Rhododendron hemitrichotum Balf. f. & Forr.

TSO logo

Sponsor

Kindly sponsored by Peter Norris, enabling the use of The Rhododendron Handbook 1998

Credits

Article from Bean's Trees and Shrubs Hardy in the British Isles

Recommended citation
'Rhododendron hemitrichotum' from the website Trees and Shrubs Online (treesandshrubsonline.org/articles/rhododendron/rhododendron-hemitrichotum/). Accessed 2020-04-02.

Genus

Other species in genus

Glossary

calyx
(pl. calyces) Outer whorl of the perianth. Composed of several sepals.
corolla
The inner whorl of the perianth. Composed of free or united petals often showy.
glabrous
Lacking hairs smooth. glabrescent Becoming hairless.
glaucous
Grey-blue often from superficial layer of wax (bloom).
midrib
midveinCentral and principal vein in a leaf.
oblanceolate
Inversely lanceolate; broadest towards apex.
ovary
Lowest part of the carpel containing the ovules; later developing into the fruit.
ovate
Egg-shaped; broadest towards the stem.
style
Generally an elongated structure arising from the ovary bearing the stigma at its tip.

References

There are currently no active references in this article.

Credits

Article from Bean's Trees and Shrubs Hardy in the British Isles

Recommended citation
'Rhododendron hemitrichotum' from the website Trees and Shrubs Online (treesandshrubsonline.org/articles/rhododendron/rhododendron-hemitrichotum/). Accessed 2020-04-02.

Shrub, 0.6-2 m; young shoots scaly, also covered with filiform hairs. Leaves 2.5-4 x 0.7-1.3 cm, narrowly elliptic, upper surface covered with filiform hairs only, lower surface shining, white-papillose, glabrous except for a few hairs along the midrib, scales scattered, rimless. Flowers 2-3, in an axillary inflorescence; calyx rim-like, scaly, ciliate; corolla pink or white edged with pink, openly funnel-shaped, 10-15 mm, outer surface glabrous and lacking scales; stamens 10; ovary densely scaly, sparsely pilose, style impressed, declinate. Flowering April-May. Royal Horticultural Society (1997)

Distribution  China N Yunnan, SW Sichuan

Habitat 2,900-4,300 m

RHS Hardiness Rating H5

Conservation status Near threatened (NT)

Taxonomic note This species is closely allied to R. mollicomum but differs in its smaller flowers and in the less densely hairy leaf lower surfaces. Royal Horticultural Society (1997)

An evergreen shrub 2 to 3 (sometimes 4 or 5) ft high, with slender, softly downy young shoots. Leaves oblong to narrowly ovate or oblanceolate, pointed, tapered at the base to a very short stalk; margins recurved; 1 to 112 (sometimes 2) in. long, 14 to 12 (sometimes 34) in. wide; dull green and downy above, glaucous and scaly but downy only on the midrib beneath. Flowers produced in April usually in pairs from several of the terminal leaf-axils, constituting altogether a crowded cluster 112 to 2 in. wide. Calyx saucer-shaped, not lobed, scaly like the flower-stalk which is 14 in. long. Corolla white to pale rose, 12 to 34 in. wide, funnel-shaped at the base with five broadly ovate lobes. Stamens ten, slightly downy towards the base; ovary scaly, style glabrous. (s. Scabrifolium)

R. hemitrichotum was described from a specimen collected by Forrest in the Muli mountains of S.W. Szechwan at 12,000 ft in July 1918 and was introduced by him the following winter (F.16250). Kingdon Ward sent seeds from the same area three years later (KW 4050), and there have been later sendings from S.W. Szechwan and also from Yunnan. In describing this species, Balfour compared it with R. mollicomum (q.v.), from which it differs in the white underside of the leaves. This character it shares with R. racemosum, and Davidian has pointed out that the two are closely allied. The chief distinction is that R. hemitrichotum is a more downy species; typically, too, it has the leaves much narrower than in R. racemosum, but this is a less reliable character for distinguishing the two species. It flowers quite young when raised from seed, sometimes in three or four years. It is hardy at Kew, having grown there in the open air since 1922.


Feedback

A site produced by the International Dendrology Society.

For copyright and licence information, see the Licence page.

To contact the editors: info@treesandshrubsonline.org.