Rhododendron pachysanthum Hayata

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'Rhododendron pachysanthum' from the website Trees and Shrubs Online (treesandshrubsonline.org/articles/rhododendron/rhododendron-pachysanthum/). Accessed 2020-01-24.

Genus

Other species in genus

Glossary

indumentum
A covering of hairs or scales.
taxon
(pl. taxa) Group of organisms sharing the same taxonomic rank (family genus species infraspecific variety).
variety
(var.) Taxonomic rank (varietas) grouping variants of a species with relatively minor differentiation in a few characters but occurring as recognisable populations. Often loosely used for rare minor variants more usefully ranked as forms.

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Credits

New article for Trees and Shrubs Online.

Recommended citation
'Rhododendron pachysanthum' from the website Trees and Shrubs Online (treesandshrubsonline.org/articles/rhododendron/rhododendron-pachysanthum/). Accessed 2020-01-24.

Shrub, young shoots tomentose, later glabrous. Leaves 6-9 x 2.5-3.5cm, oblong, apex acute to apiculate, lower surface with a whitish brown to rufous tomentum that usually persists, occasionally only over the midrib; petioles tomentose. Flowers 10-20, in a dense truss; calyx c.1mm; corolla white to pale pink, with or without purple flecks, blotch apparently absent, 40mm, widely campanulate, without nectar pouches; ovary densely stalked-glandular, style glabrous.

Season April-May.

Distribution Taiwan.

RHS Hardiness H4a-b.

Awards AM 1989 (P.A. Cox, Glendoick, Perthshire), from Rhododendron Venture, Taiwan, RV 72/001; corolla white and densely spotted. AGM 1993

Taxonomic note (syn. R. pseudochrysanthum Hayata var. rufovelutinum (T.Yamaz.) T.Yamaz.)

Cultivated plants are distinctive on account of their usually persistent leaf indumentum. However, recent Japanense authors treat this as a variety of R. pseudochrysanthum. In the wild this taxon has an extremely restricted distribution.


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