Reference

  • S

  • Sacramento State University (2006) Trees and Shrubs Growing in the University Arboretum Sacramento State University August 30, 2006 [link] (accessed 2018-09-03)
  • Saito, Y. et al. (2017) Genetic Variation in Quercus acutissima Carruth., in Traditional Japanese Rural Forests and Agricultural Landscapes, Revealed by Chloroplast Microsatellite Markers in Forests 8:11 451
  • Sakai, A., Paton, D.M. & Wardle, P. (1981) Freezing Resistance of Trees of the South Temperate Zone, Especially Subalpine Species of Australasia in Ecology 62:3 563-70 [link] (accessed 2021-09-01)
  • Salas Pascual, M., Acebes Ginovés, J.R. & del Arco Aguilar, M. (1993) Arbutus ×androsterilis, a New Interspecific Hybrid between A. canariensis and A. unedo from the Canary Islands. in Taxon 42:4 789-792 [link] (accessed 2021-02-03)
  • Salmon, J.T. (1980) The Native Trees of New Zealand, A.H. & A.W. Read Ltd, Wellington
  • Salmon, J.T. (1996) The Native Trees of New Zealand 3rd edn, Reed Books, Auckland
  • Samuel, R. et al. (2005) Molecular phylogenetics of Phyllanthaceae: evidence from plastid matK and nuclear PHYC sequences in American Journal of Botany 92 132–141
  • San Marcos Growers (2001 onwards) [nursery website] [link] (accessed 2021-02-04)
  • San Marcos Growers (2020) Lyonothamnus [link] (accessed 2020-07-31)
  • Sánchez de Lorenzo-Cáceres, J.M. (2001) Guia de las plantas ornamentales, Ediciones Mundi-Prensa, Madrid
  • Sands, M.J.S. (1974) Tab. 669 Maytenus magellanica (Celastraceae) in Curtis’s Botanical Magazine 180 37–43
  • Sang, T., Crawford, D.J. & Stuessy, T.F. (1997) Chloroplast DNA phylogeny, reticulate evolution, and biogeography of Paeonia (Paeoniaceae). in American Journal of Botany 84 1120-1136 [link] (accessed 2020-10-02)
  • Santamour, F. S. & McArdle, A. J. (1984) Cultivar Checklist for Liquidambar and Liriodendron in Journal of Arboriculture 10:11 309
  • Santamour, F. S. & McArdle, A. J. (1985) Checklists of Cultivars of Linden (Tilia) Species in Journal of Arboriculture 11:5
  • Santini, A. et al. (2007) Fiorente and Arno elm trees in HortScience 42 712–714
  • Santiso, X. et al. (2016) Population Structure of a Widespread Species under Balancing Selection: The Case of Arbutus unedo L. in Frontiers in Plant Science 6 1264 [link] (accessed 2021-01-21)
  • Saratoga Horticultural Research Foundation (2003) Arbutus ‘Marina’ [link] (accessed 2008-03-22)
  • Sargent, C. S. (1894) Forest Flora of Japan, The Riverside Press, Cambridge, Massachusetts
  • Sargent, C. S. (1894) Forest Flora of Japan - Notes on the Forest Flora of Japan, The Riverside Press, Cambridge, Massachusetts
  • Sargent, C. S. (1905) Trees and shrubs : illustrations of new or little known ligneous plants, prepared chiefly from material at the Arnold Arboreum of Harvard University 1, Houghton, Mifflin and Company, Boston
  • Sargent, C.S. (1913) Plantae Wilsonianae: An Enumeration of the Woody Plants Collected in Western China for the Arnold Arboretum of Harvard University during the Years 1907, 1908, and 1910 by E.H. Wilson, vol. 1, Cambridge University Press, Cambridge
  • Sargent, C.S. (1916) Plantae Wilsonianae: An Enumeration of the Woody Plants Collected in Western China for the Arnold Arboretum of Harvard University during the Years 1907, 1908, and 1910 by E.H. Wilson, vol. 2, Cambridge University Press, Cambridge
  • Sargent, C.S. (1917) Plantae Wilsonianae: An Enumeration of the Woody Plants Collected in Western China for the Arnold Arboretum of Harvard University during the Years 1907, 1908, and 1910 by E.H. Wilson, vol. 3, Cambridge University Press, Cambridge
  • Sargent, C.S. (1918) Notes on North American Trees. II. Carya. Bot. Gaz. 66:229 258. in Botanical Gazette 66 229-258 [link] (accessed 2019-11-11)
  • Sargent, C.S. (1919) Notes on North American Trees IV in Botanical Gazette 67 208-242 [link] (accessed 2021-06-17)
  • Sargent, C. S. (1965) Manual of the Trees of North America 2, Dover Publications Inc. , New York
  • Sargent, C.S. (ed) (1917) Plantae Wilsonianae III, Harvard University Press, Cambridge
  • Sargent, C.S. & Wilson, E.H. (1913-1917) Plantae Wilsonianae; an enumeration of the woody plants collected in western China for the Arnold arboretum of Harvard university during the years 1907, 1908, and 1910, The University Press, Cambridge [link] (accessed 2021-02-16)
  • Sato, T. et al. (2006) Effect of gene flow on spatial genetic structure in the riparian canopy tree Cercidiphyllum japonicum revealed by microsatellite analysis. in Heredity 96 79-84 [link] (accessed 2021-04-27)
  • Satoh, K. (1998) Metasequoia Travels the Globe in Arnoldia 58:4 72-75
  • Savill, P. (2013) The silviculture of trees used in British forestry, CABI, Wallingford, UK
  • Savill, P. (2019) The Silviculture of Trees Used in British Forestry., CABI, Wallingford, Oxfordshire
  • Savill, P. et al. (2016) Silver Firs (Abies spp) of Europe and the Near East in Quarterly Journal of Forestry 110:1 18-30
  • Savill, P. & Wilson, S.M. (2015) Cedrus; True Cedars - silviculture and properties 109:3 in Quarterly Journal of Forestry 168-173
  • Sax, K. (1959) The cytogenetics of facultative apomixis in Malus species in Journal of the Arnold Arboretum 15 289-297 [link] (accessed 2020-05-13)
  • Sax, M. (2011) A Year With the Apples of the Arnold Arboretum in Arnoldia 69:2 29-39 [link] (accessed 2020-05-08)
  • Scaltsoyannes, A. (1999) Allozyme differentiation and phylogeny of cedar species in Silvae Genet 48 61-68
  • Schaarschmidt, H. (1999) Beitrag zur Sand-Hickory, Carya pallida (Ashe) Engl & Graebn. (Juglandaceae) in Gleditschia 27 19–24
  • Schaarschmidt, H. (2002) Hickories (Carya spp., Juglandaceae) im Südosten der USA und ihr Bezug zu Kulturstandorten in Mitteleuropa in Mitteilungen der deutschen dendrologischen Gesellschaft 87 163–177
  • Schäfer, H. (2002) Flora of the Azores: A Field Guide, Margraf Verlag, Weikersheim
  • Schicchi, R., Knees, S.G. & Gardner, M.F. (2019) Abies nebrodensis, from the website: ‘Threatened Conifers of The World’, Royal Botanic Garden Edinburgh [link] (accessed 2020-11-11)
  • Schilling, T. (1999) Populus jacquemontii var glauca in The New Plantsman 6 96–98
  • Schilling, T. (2007) Prunus himalaica forty years on in The Plantsman (n.s.) 6: 240–241. 6 240–241 (n.s.)
  • Schlarbaum, S.E. et al. (1999) Three American Tragedies: Chestnut Blight, Butternut Canker, and Dutch Elm Disease [link] (accessed 2008-12-23)
  • Schlesinger, R.C. (1990) Carya laciniosa (Michx. f.) Lould. Shellbark Hickory in Burns, R.M. (ed) Silvics of North America 2 429-435, Forest Service, United States Department of Agriculture [link] (accessed 2019-11-23)
  • Schmidt, J.F. (2019 onwards) J. Frank Schmidt & Son Co. nursery website [link] (accessed 2020-02-26)
  • Schmidt & Son, J.F (2020) Champion’s Gold™ Dogwood Cornus kousa ‘Losely’ PP 23423 [link] (accessed 2020-12-08)
  • Schneider, C.K. (1906) Illustriertes Handbuch der Laubholzkunde 1, Gustav Fischer, Jena [link] (accessed 2019-06-28)
  • Schneider, C. K. (1912) Illus. Handbuch der Laubholzkunde 2
  • Schnitzler, A. et al. (2014) Wild European Apple (Malus sylvestris (L.) Mill.) Population Dynamics: Insight from Genetics and Ecology in the Rhine Valley. Priorities for a Future Conservation Programme in PLoS ONE 9:5 e96596 [link] (accessed 2020-05-26)
  • Schönbeck-Temesy, E. (1969) Pyrus in Rechinger, K.H. (ed) Flora Iranica 66 27–36, Akademische Druck und Verlagsanstalt, Graz
  • Schonland, S. (1930) The South African species of Rhus L in Bothalia 3 1–115
  • Schrader, J. & Graves, W. (2002) Infraspecific Systematics of Alnus maritima (Betulaceae) from Three Widely Disjunct Provenances in Castanea 67:4 380-401 [link] (accessed 2020-11-20)
  • Schrader, J. & Graves, W. (2004) Systematics of Alnus maritima (Seaside Alder) Resolved by ISSR Polymorphisms and Morphological Characters in Journal of the American Society for Horticultural Science 129 231-236
  • Schreiner, E.J. & Duffield, J.W. (1942) Metaxenia in an Oak Species Cross in Journal of Heredity 33:3 97-98
  • Schuch, U.K. et al. (1992) Properties of Persea indica, an ornamental for Southern California in Proceedings of Second World Avocado Congress 1992 191–198
  • Schultz, J. (2003) Conservation Assessment for Butternut or White walnut (Juglans cinerea L.), USDA Forest Service, Eastern Region, Milwaukee, Wisconsin [link] (accessed 2019-10-01)
  • Schulz, B. (2018) Identification of Trees and Shrubs in Winter using Buds and Twigs, Kew Publishing, Richmond
  • Schuster, M. & Büttner, R. (1995) Chromosome numbers in the Malus wild species collection of the genebank Dresden-Pillnitz in Genetic Resources and Crop Evolution 42 353-361 [link] (accessed 2020-05-15)
  • Schwartz, M. (2005) Conservationists should not move Torreya taxifolia in Wild Earth:January 2005 1–4
  • Scobie, A.R. & Wilcock, C.C. (2009) Limited mate availability decreases reproductive success of fragmented populations of Linnaea borealis, a rare, clonal self-incompatible plant. in Annals of Botany 103:6 835-846
  • Scott Arboretum (2021) Scott Arboretum: Plant of the Month: Cladrastis kentukea [link] (accessed 2021-01-20)
  • Scott, R. & Sullivan, W.C. (2007) A review of suitable companion crops for black walnut 71 185-193 in Agroforestry Systems [link] (accessed 2019-09-13)
  • Seaforde Gardens (2007) Eucryphias [link] (accessed 1970-01-01)
  • Seager, R. (2006) The source of Europe’s mild climate in American Scientist 94 334–341
  • Seager, R. (2008) Setting the record straight on Europe’s mild winters in The Plantsman 7 22–27 (n.s.)
  • Sealy, J.R. (1949) Arbutus unedo in Journal of Ecology 37:2 365-388 [link] (accessed 2021-01-21)
  • Sealy, J.R. (1958) A Revision of the Genus Camellia, Royal Horticultural Society, London
  • Sedbrook, J. (2007) A tree for all seasons [link] (accessed 2008-03-22)
  • Senior, R. (2004) Some uncommon, untried or tender plants in McMillan Browse, P. (ed) Gardening on the Edge: Drawing on the Cornwall Experience, Alison Hodge, Penzance
  • Seybold, S.J. (2017) Wingnut trees at risk to thousand cankers disease US Forest Service Research Highlights (accessed 2019-06-28)
  • Shah, A. et al. (2008) Delimitation of Taxus fuana Nan Li & R.R. Mill (Taxaceae) based on morphological and molecular data in Taxon 57 211–222
  • Shang, C.-B. (1974) A new species of Phoebe from Chekiang in Acta Phytotaxonomica Sinica 12 295–297
  • Shao, Y-Z. et al. (2020) Species delimitation and phylogeography of Abies delavayi complex: Inferred from morphological, molecular, and climatic data in Journal of Systematics and Evolution 58:3 234-246
  • Shao, Y-Z. & Xiang, Q-P. (2015) Species delimitation and phylogeography of the Abies chensiensis complex inferred from morphological and molecular data in Botanical Journal of the Linnean Society 177 175-188
  • Shaw, K. et al. (2014) The Red List of Betulaceae, Botanic Gardens Conservation International, Richmond, Kew
  • Shaw, K. & Herd, A. (2014) Global Survey of Ex Situ Conifer Collections, BGCI
  • Sheffield's Seeds Company (2018) Sheffield's Seeds Company Catalog 2018 [link] (accessed 2018-11-23)
  • Shemluck, M.J. et al. (2003) A preliminary study of the taxane chemistry and natural history of the Mexican Yew, Taxus globosa Schltdl in Boletín de la Sociedad Botánica de México 72 119–127
  • Shen, P. et al. (2020) Genetic analysis of main flower characteristics in the F1 generation derived from intraspecific hybridization between Plumbago auriculata and Plumbago auriculata f. alba in Scientia Horticulturae 274 109652 [link] (accessed 2021-04-14)
  • Shephard, S. (2012) Seeds of Fortune: A gardening dynasty 320, A&C Black
  • Sherman-Broyles, S.L., Barker, W.T. & Schulz, L.M. (1997) Ulmaceae Mirbel–Elm Family in Flora of North America Editorial Committee (ed) Flora of North America North of Mexico 3 368–380, Oxford University Press, New York
  • Shi, S. et al. (2001) Phylogeny of the Altingiaceae based on cpDNA matK, PY-IGS and nrDNA ITS sequences in Plant Systematics and Evolution 230 13–24
  • Shin, H.S., Hwang, J.H. & Yoon, K.J. (2011) Distribution of Vascular Plants in the Ulleung Forest Trail Area (Seokpo to Naesujeon). in Journal of Korean Nature 4:2 79-85
  • Shirazi, A.M. & Ware, G.H. (2004) Evaluation of new elms from China for cold hardiness in northern latitudes in International Symposium on Asian Plant Diversity and Systematics 2004, Sakura, Japan
  • Shishkin, B. K. (1974) Flora of the USSR 17, Israel Program for Scientific Translations, Jerusalem
  • Shu, Z. et al. (2016) Natural Hybridization between Persian Walnut and Chinese Walnut Revealed by Simple Sequence Repeat Markers in Journal of the American Society for Horticultural Science 141:2 146-150 [link] (accessed 2019-09-30)
  • Siahkolaee, S. N. et al. (2017) Do we have different varieties in Acer velutinum (Sapindaceae): Morphological and molecular studies in Phytotaxa 321:2 151-165
  • Sigma-Aldrich (2021) Plumbagin from Plumbago indica [from online chemical catalogue] [link] (accessed 2021-03-30)
  • Silba, J. (1981b) A long-misunderstood Asiatic cypress: Cupressus chengiana Hu (Cupressaceae) in Baileya 21 143–144
  • Silba, J. (1981a) A revision of the genus Cupressus L (Cupressaceae) in Phytologia 49 390–399
  • Silba, J. (1983) Addendum to a revision of Cupressus L (Cupressaceae) in Phytologia 52 349–361
  • Silba, J. (1986) Encyclopaedia Coniferae in Phytologia Memoirs 8 1–217
  • Silba, J. (1990) A supplement to the International Census of the Coniferae II in Phytologia 68 7–78
  • Silba, J. (1994) The trans-Pacific relationships of Cupressus in India in Journal of the International Conifer Preservation Society 1 1–28
  • Silba, J. (1996) A new species of Pseudotaxus (Cheng) Cheng (Taxaceae) from China 322-328 in Phytologia
  • Silba, J. (1998) A monograph of the genus Cupressus L in Journal of the International Conifer Preservation Society 5 1–98
  • Silba, J. (2005) A monograph of the genus Cupressus L in the twenty-first century in Journal of the International Conifer Preservation Society 12:2 31–103
  • Sima, Y.K. et al. (2006) Magnolia amabilis, a New Species of Magnoliaceae from Yunnan, China in Novon 16 133-135
  • Sima, Y.K. et al. (2019) Magnolia amabilis, a New Species of Magnoliaceae from Yunnan, China 16 133-135 in Novon 16 133-135
  • Simeone, M.C. et al. (2018) Comparative systematics and phylogeography of Quercus Section Cerris in western Eurasia: inferences from plastid and nuclear DNA variation in PeerJ – Life & Environment 6 e5793 [link] (accessed 2020-11-20)
  • Simmons, S.L. (2007) Staphyleaceae. in Kubitzki, K. (ed) Flowering Plants · Eudicots. The Families and Genera of Vascular Plants 9, Springer, Berlin, Heidelberg
  • Simpson, B.B. (1979) A revision of the genus Polylepis (Rosaceae: Sanguisorbeae) in Smithsonian Contributions to Botany 43 1–62
  • Sims, J. (1819) Plumbago capensis. Phlox-like Lead-Wort. in Curtis's Botanical Magazine 47 t. 2110 [link] (accessed 2021-04-14)
  • Sims, J. (1822) Arbutus unedo var. δ. integerrima in Curtis's Botanical Magazine 44 t. 2319 [link] (accessed 2021-01-27)
  • Singh, K., Naidoo, Y. & Baijnath, H. (2018) A comprehensive review of the genus Plumbago with focus on Plumbago auriculata (Plumbaginaceae) in African Journal of Traditional, Complementary and Alternative Medicines 15:1 199-215 [link] (accessed 2021-04-13)
  • Singing tree gardens nursery (2021) Snow Tower [link] (accessed 2021-02-03)
  • Siriri, D. et al. (2010) Tree species and pruning regime affect crop yield on bench terraces in SW Uganda in Agroforestry Systems 78 65–77 [link] (accessed 2020-11-18)
  • Sjölund, M.J. et al. (2017) Understanding the legacy of widespread population translocations on the post‐glacial genetic structure of the European beech, Fagus sylvatica L. in Journal of Biogeography 44:11
  • Skelton, P. & Smith, A. (2002) Cladistics: A Practical Primer on CD-ROM, Cambridge University Press, Cambridge
  • Skvortsov, A.K. (1998) Two Chinese birches described by A Franchet in 1899 and misunderstood by subsequent authors in Harvard Papers in Botany 3 109–112
  • Skvortsov, A.K. (2002) A new system of the genus Betula in Bulletin of Moscow Society of Naturalists (Biological Series) 107 73–76
  • Slavin, A.D. (1932) Some Conifers Cultivated in the United States in Chittenden, F.J. (ed) Conifers In Cultivation: The report of the conifer conference held by the Royal Horticultural Society, Nov. 10–12, 1931, Royal Horticultural Society
  • Sleumer, H. (1954) Flacourtiaceae in Flora Malesiana, Series I 5 1–106
  • Sleumer, H. (1967) Monographia Clethraceum, Parts 1, 2 in Botanische Jahr bücher 87 36–116, 117–175
  • Small, J.K. (1927) A new Nyssa from Florida in Torreya 27 92–93
  • Smalley, E.B. & Guries, R.P. (2000) Asian elms: sources of disease and insect resistance in Dunn, C.P. (ed) The Elms 215–230 (q.v.)
  • Smalley, G.W. (1990) Carya glabra (Mill.) Sweet Pignut Hickory in Burns, R.M. (ed) Silvics of North America 2 404-417, U.S. Department of Agriculture, Forest Service, Washington, DC [link] (accessed 2019-11-24)
  • Smissen, R. D. et al. (2014) Relationships, gene flow and species boundaries among New Zealand Fuscospora (Nothofagaceae: southern beech) in New Zealand Journal of Botany 52:4 389-406 [link] (accessed 2020-10-08)
  • Smith, A.C. (1943) The American species of Drimys in Journal of the Arnold Arboretum 24 1–33
  • Smith, A.C. (1947) The families Illiciaceae and Schisandraceae in Sargentia 7 1–224
  • Smith, A.C. (1969) A reconsideration of the genus Tasmannia (Winteraceae) in Taxon 18 286–290
  • Smith College (2005a) Conservation of Amentotaxus [link] (accessed 2008-03-22)
  • Smith College (2005b) Conservation of Cupressus dupreziana [link] (accessed 2008-03-22)
  • Smith, D. (2019) Some Popular Itoh Varieties American Peony Society (accessed 2020-08-28)
  • Smith, H.C. (1990) Carya cordiformis (Wangenh.) K. Koch Bitternut Hickory in Silvics of North America 2 190-197 [link] (accessed 2019-11-09)
  • Smith, H.C. (1990) Carya tomentosa (Poir.)Nutt. Mockernut Hickory in Burns, R.M. Silvics of North America 2 455-469, United States Department of Agriculture, Forest Service, Washington, DC [link] (accessed 2019-11-24)
  • Smith, J.E. (1819) The Cyclopaedia, or, Universal Dictionary of Arts, Sciences and Literature 29 Quercus no. 27, London
  • Smith, N.W. (2018) Lyonothamnus floribundus subsp. aspleniifolia [link] (accessed 2020-08-07)
  • Smith, R.E. (1909) . in University of California Agricultural Experiment Station Bulletin 203 27
  • Smith, S.E. & Read, D.J. (2008) Mycorrhizal Symbiosis (3rd edition), Academic Press, New York
  • Smith, T. (1994) Carya pallida, a new hickory for Missouri in Missouriensis 15:1 5-7 [link] (accessed 2019-11-25)
  • Smith, W. W. (1914) Buddleia caryopteridifolia 8 179 in Notes Royal Botanic Gardens Edinburgh 8 179
  • Smith, W.W. (1921) Phoebe forrestii W.W. Sm. in Notes from the Royal Botanic Garden Edinburgh 13 176
  • Smithers, P. (1995) Adventures of a Gardener, Harvill Press, London
  • Snell, R. (1989) From the Bare Stem: Making Dorothy Elmhirst's Garden at Dartington Hall, Devon Books, Exeter
  • Snyers, C. (2014) A Natural Hybrid? International Oak Society (accessed 2020-11-10)
  • Society of Ontario Nut Growers (2013) Nut trees that grow in Ontario [link] (accessed 2019-09-26)
  • Soepadmo, E. (1972) Fagaceae in Flora Malesiana, Series I t 265–403 Part 2, Series 1, Wolters-Noordhoff Publishing, Groningen, The Netherlands Biodiversity Heritage Library (accessed 2021-07-18)
  • Solaris Farms (2020 onwards) Solaris Farms [nursery website] [link] (accessed 2020-09-10)
  • Søndergaard, P. (1985) Tour in Nepal in International Dendrology Society Yearbook 1984 36–51
  • Søndergaard, P. (1997) Experiences with Nothofagus in East Norway and West Denmark in Dansk. Dendrologisk Arsskrift 15 61-90
  • Søndergaard, P. (2004) Araucaria araucana in Norway. in International Dendrology Society Yearbook 90-101 2003
  • Song Sparrow Nursery (2020) Acer truncatum 'Velazquez' Song Sparrow Farm and Nursery (accessed 2020-03-31)
  • Sophora (2020 onwards) Nursery website SZKÓŁKA ROŚLIN OZDOBNYCH (accessed 2020-03-19)
  • Sørensen, P.D. (1995) Ericaceae – Part II. The Superior-Ovaried Genera (Monotropoideae, Pyroloideae, Rhododendroideae, and Vaccinioideae p.p.) in Flora Neotropica 66:194-221
  • Sørensen, P.D. (2009) Arbutus Linnaeus in Flora of North America Editorial Committee (ed) Flora of North America 8 398-400, Oxford University Press, New York
  • Sosa, V. (1978) Cornaceae in Gómez-Pompa, A. & Sosa, V. (eds) Flora de Veracruz 2, INIREB, Xalapa
  • Sotiropoulos, T. et al. (2011) ‘Ntoulia 1’ and ‘Ntoulia 2’ Cornelian Cherries (Cornus mas L.) in Hortscience 46:6 955-957
  • Soto-García, D., García Viñas, J.I. & Pérez Bujarrabal, E. (2004) Descripción del híbrido Abies × masjoannis in Investigación Agraria: Sistemas y Recursos Forestales 13:2 347-356
  • Souček, J. (2018) Oaks in Iran, September 28-October 16, 2016 in International Oaks 29 151-161 [link] (accessed 2020-11-13)
  • Sourzat, P. (2013) Black Trufles and Oak Trees in France and in Europe in International Oaks 24 77-87 [link] (accessed 2021-02-05)
  • Southern Woods Nursery Ltd. (2020) Southern Woods Plant Nursery [link] (accessed 2020-08-04)
  • Spach, E. (1834) Histoire Naturelle des Végétaux 2, Paris [link] (accessed 2021-04-07)
  • Spampinato, G. (2014) Guida alla flora dell'Aspromonte, Laruffa Editore, Reggio Calabria
  • Späth (2020 onwards) Späth Baumenschule [link] (accessed 2020-02-24)
  • Speciality Trees (2021 onwards) Speciality Trees [nursery website] [link] (accessed 2021-01-15)
  • Spencer, R. (2002) Horticultural Flora of South-Eastern Australia, Volume 3 3 656, University of New South Wales
  • Spencer, R.D. & Lumley, P.F. (2002) Callistemon in Harden, G.J. (ed) Flora of New South Wales 2 193–198. Revised edn, University of New South Wales Press, Sydney
  • Spengler, R.N. (2019) Origins of the Apple: The Role of Megafaunal Mutualism in the Domestication of Malus and Rosaceous Trees in Frontiers in Plant Science 10 617 [link] (accessed 2020-05-26)
  • Spjut, R.J. (2007) Taxonomy and nomenclature of Taxus (Taxaceae) in Journal of the Botanical Research Institute of Texas 1 203–289
  • Spongberg, S.A. (1974) A review of deciduous-leaved species of Stewartia (Theaceae) in Journal of the Arnold Arboretum 55:2 182-214
  • Spongberg, S.A. (1976) Magnoliaceae hardy in temperate North America in Journal of the Arnold Arboretum 57 250-311 [link] (accessed 2021-05-18)
  • Spongberg, S.A. (1976) Styracaceae hardy in temperate North America in Journal of the Arnold Arboretum 57 54–73
  • Spongberg, S.A. (1979) Cercidiphyllaceae hardy in temperate North America. in Journal of the Arnold Arboretum 60 367-376
  • Spongberg, S.A. (1990) A Reunion of Trees: The Discovery of Exotic Plants and Their Introduction into North American and European Landscapes, Harvard University Press, Cambridge, MA
  • Spongberg, S.A. (1991) A Sino-American sampler in Arnoldia 51 2–14
  • Spongberg, S.A. (1998) Magnoliaceae hardy in cooler temperate regions in Hunt, D. Magnolias and their Allies 81–144, International Dendrology Society/The Magnolia Society, Sherborne, Dorset
  • Spongberg, S A & Ma, J (1997) Cladrastis (Leguminosae subfamily Faboideae tribe Sophoreae): A Historic and Taxonomic Overview in International Dendrology Society Yearbook 1996 27 -35
  • St Lawrence Nurseries (2020 onwards) Nursery Website [link] (accessed 2020-06-11)
  • Stace, C. (1997) New Flora of the British Isles, Cambridge University Press, Cambridge
  • Stace, C. (2010) New Flora of the British Isles, Cambridge University Press, Cambridge
  • Stace, C. (2019) New Flora of the British Isles Fourth Edition, C & M Floristics
  • Stace, C.A. & Crawley, M.J. (2015) Alien Plants, William Collins, London
  • Standley, P.C. (1920–1924) Trees and shrubs of Mexico in Contributions from the United States National Herbarium 23 parts 1–4
  • Standley, P.C. (1922) Trees and shrubs of Mexico (Fagaceae – Fabaceae) in Contributions from the United States National Herbarium 23 171–515
  • Standley, P.C. (1924) Trees and shrubs of Mexico (Passifloraceae – Scrophulariaceae) in Contributions from the United States National Herbarium 23 849–1312
  • Standley, P.C. & Steyermark, J.A. (1952) Flora of Guatemala in Fieldiana 24 3
  • Stanford, A.M., Harden, R. & Parks, C.R. (2000) Phylogeny and biogeography of Juglans (Juglandaceae) based on matK and ITS sequence data in American Journal of Botany 87 872–882
  • Stapf, O. (1914) Ceratostigma willmottianum in Curtis's Botanical Magazine 140 t. 8591 [link] (accessed 2021-03-30)
  • Stapf, O. (1920) The Botanical History of the 'Sindian' and the Age of Abraham's Oak in Bulletin of Miscellaneous Information (Royal Botanic Gardens, Kew) 1920:8 258-64 [link] (accessed 2020-07-01)
  • Stavanger Botanic Garden (2020) Stavanger Botanic Garden [link] (accessed 2020-07-19)
  • Stearn, W.T. (1983) Botanical Latin, David & Charles, Newton Abbot, Devon
  • Stecconi et al, M (2004) Annals of Botany 94:6 775 - 786
  • Stennes, M.A. (2000) Dutch elm disease chemotherapy with Arbotect 20-S® and Alamo® in Dunn, C.P. (ed) The Elms 173–188 (q.v.)
  • Stephan, J. (2017) Species Spotlight: Quercus ithaburensis Decne., International Oak Society [link] (accessed 2021-02-01)
  • Stephan, J. (2018) Quercus brantii. The IUCN Red List of Threatened Species 2018 [link] (accessed 2020-08-07)
  • Stephan, J. (2018a) Quercus look. The IUCN Red List of Threatened Species 2018: e.T79156563A122961496 [link] (accessed 2021-02-08)
  • Stephen F. Austin State University (2001) University Receives Patent for New Anti-Cancer Crop [link] (accessed 2008-03-22)
  • Stern, F.C. (1946) A Study of the Genus Paeonia, Royal Horticultural Society, London
  • Stern, F.C. (1974) A Chalk Garden (2nd Edition), Faber & Faber, London
  • Stern, F.C. & Taylor, G. (1953) Paeonia lutea var. ludlowii in Botanical Magazine 169 t.209
  • Stern, M. (2002) Rhus lancea (L. f.) [link] (accessed 2008-05-10)
  • Sternberg, G. (1995) Oak images from temperate North America in Journal of the International Oak Society 6 9–17
  • Sternberg, G. (2004) Native Trees for North American Landscapes (with Jim Wilson), Timber Press, Portland, Oregon
  • Stevens, P.F. (2001–2008) Angiosperm Phylogeny Website Version 9, June 2008 [link] (accessed 2008-07-17)
  • Stevens, P.F., Dressler, S. & Weitzman, A.L. (2004) Theaceae in Kubitzki, K. (ed) The Families and Genera of Vascular Plants 6 463–471 (q.v.)
  • Stewart, P. (1970) Cupressus dupreziana, threatened conifer of the Sahara in Biological Conservation 2 10–12
  • Stewart, R. (2010) Dipelta, little known Weigela relative [link]
  • Stewart, R. (2021) Future Plants: Abelia [link] (accessed 2021-04-02)
  • Stewart, R (ed) (2021) Future Plants (Cladrastis) [link] (accessed 2021-01-20)
  • Stipes, R.J. (2000) The management of Dutch Elm Disease in Dunn, C.P. (ed) The Elms 157–172 (q.v.)
  • Stone, D.E. & Whittemore, A.T. (1997) Juglandaceae A Richard ex Kunth. Walnut Family. in Flora of North America Editorial Committee (ed) Flora of North America North of Mexico 3 416–428, Oxford University Press, New York
  • Straley, G. B. (1992) Trees of Vancouver: A Guide to the Common and Unusual Trees of the City, Vancouver
  • Strandby, U., Christensen, K.I. & Sørensen, M. (2009) A morphometric study of the Abies religiosa—hickelii—guatemalensis complex (Pinaceae)in Guatemala and Mexico in Plant Systematics and Evolution 280:1 59-76
  • Strandby, U. et al. (2006) Conservation and utilisation of Abies guatemalensis Rehder (Pinaceae) – an endangered endemic conifer in Central America in Biodiversity and Conservation 15 3131-3151
  • Strijk, J. (2020) Species Spotlight: Quercus tarokoensis Hayata, International Oak Society International Oak Society (accessed 2020-08-26)
  • Strijk, J.S. (2018) The Oaks of Hong Kong: Evolutionary and Morphological Diversity on a Continental Margin in International Oaks 29 77–90 International Oak Society (accessed 2021-07-16)
  • Strother, J.L. (2014) Flora of North America in Flora of North America 9 Rosaceae
  • Strother, J.L. (2015) Tilia Linnaeus in Flora of North America Editorial Committee (ed) Flora of North America 6, Oxford University Press, New York and Oxford [link] (accessed 2020-02-06)
  • Stuart, D.D. (2006) Buddlejas, Timber Press, Portland, Oregon
  • Stuart, D.D. (2006) Buddlejas (Royal Horticultural Society Plant Collector Guide), Timber Press, Portland, OR, USA
  • Sturdza, I. & Willery, D. (2021) Selections Great Star [link] (accessed 2021-02-02)
  • Su, R. & Su, Z. (2005) Study on Relations of Seed Dispersal, Germination and Age-Class Distribution of Population in Davidia involucrata. in Scientia Silvae Sinicae 41:3 192-195
  • Sudworth, G.B. (1916) The Spruce and Balsam Fir Trees of the Rocky Mountain region. in United States Department of Agriculture Bulletin 327
  • Sun, J. et al. (2018) Phylogeny of Maleae (Rosaceae) Based on Multiple Chloroplast Regions: Implications to Genera Circumscription in BioMed Research International 2018 Article ID 7627191 [link] (accessed 2020-05-04)
  • Sun, J.-F. et al. (2008) Multifunctional bracts in the dove tree Davidia involucrata (Nyssaceae: Cornales): rain protection and pollinator attraction. in The American Naturalist 171 119-124
  • Sun, J.-F. & Huang, S.-Q. (2011) White Bracts of the Dove Tree (Davidia involucrata): Umbrella and Pollinator Lure? in Arnoldia 68:3 2-10
  • Sun, S.-G., Lu, Y. & Huang, S.-Q. (2006) Floral phenology and sex expression in functionally monoecious Rhoiptelea chiliantha (Rhoipteleaceae) in Botanical Journal of the Linnean Society 152 145-151 [link] (accessed 2019-12-15)
  • Sunshine Nursery (2008) Elm Leaf Beetle Survey [link] (accessed 2008-05-31)
  • Superoots (2008) Website on Air-Pots [link] (accessed 2008-12-23)
  • Suprin, B (2011) Florilège des plantes en Nouvelle-Calédonie 1-2 520, Photosynthèse, Noumea
  • Sutton, J.J. (2019) For the Love of Wingnuts in Plant Heritage Devon Group Newsletter Summer 2019 8
  • Swamy, B.G.L. & Bailey, I.W. (1949) The Morphology and Relationships of Cercidiphyllum in Journal of the Arnold Arboretum 30:2 187-210 [link] (accessed 2021-04-26)
  • Swearingen, J. & Bargeron, C. (2016) Invasive Plant Atlas of the United States, University of Georgia Center for Invasive Species and Ecosystem Health [link] (accessed 2020-07-31)
  • Swingle, W.T. (1913) Citrus ichangensis, a promising, hardy, new species from southwestern China and Assam in Journal of Agricultural Research 1 1–15
  • Swingle, W.T. (1944) The history, botany and breeding I–III in Webber, H.J. & Batchelor, L.D. (eds) The Citrus Industry I Three volumes., University of California Press, Berkeley
  • Sykes, W.R. (1987) Kermadec ngaio (Myoporum, Myoporaceae) in New Zealand Journal of Botany 25 595–601
  • Syring, J. et al. (2005) Evolutionary relationships among Pinus (Pinaceae) subsections inferred from multiple low-copy nuclear loci in American Journal of Botany 92 2086–2100
  • Syring, J. et al. (2007) Widespread genealogical nonmonophyly in species of Pinus subgenus Strobus in Systematic Biology 56 163–181
  • Sytsma, K.J. et al. (2002) Urticalean Rosids: circumscription, Rosid ancestry, and phylogenetics based on rbcL, trnL-F, and ndhF sequences in American Journal of Botany 89 1531–1546
  • Szent István Egyetem (2020 onwards) Budai Arboretum website [link] (accessed 2020-03-20)
  • Szkółka Szmit (2020 onwards) Nursery website [link] (accessed 2020-03-24)