Rhododendron stewartianum Diels

Notes R.B.G. Edinb. 5: 211 (1912).

WFO ID: wfo-0001048891

IPNI ID: urn:lsid:ipni.org:names:333409-1

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Description

Shrub, 0.5-2.5m; bark smooth or rough, peeling on smaller branches; young shoots often glandular. Leaves obovate to elliptic, 4-12 x 2-6.5cm, 1.8-2.5 x as long as broad, apex rounded, apiculate, base rounded, upper surface glabrous, lower surface with mammillate epidermis and a thin ± persistent to evanescent fawn indumentum interspersed with sessile glands, especially towards the base; petioles 0.5-2cm, usually glabrous, occasionally with a few glands, with or without wings. Inflorescence 3-7-flowered; rhachis usually less than 5mm; pedicels c.20mm, glabrous to sparsely stipitate-glandular. Calyx (2-)5-15mm, cupular, lobes broadly ovate, glandular-ciliate or glabrous. Corolla campanulate to tubular-campanulate, white or cream to pale (rarely deep) rose, with or without purple flecks, 35—55mm. Ovary usually densely glandular; style glabrous. Capsule 15—30 x c.6mm.

Distribution

China (SE Xizang, NW Yunnan), NE Upper Burma

Altitude

Habitat

Cane brakes, stony slopes

Nomenclatural History

R. nipholobum Balfour f. & Farrer, Notes R.B.G. Edinb. 13:

277 (1922) Type: NE Upper Burma, Chawchi Pass, etc., 10500ft, 15 v 1920,Farrer 1552b (holo. E;

iso. K). R. aiolosalpinx Balfour f. & Farrer, ibid. 13:227 (1922). Type: NE Upper Burma,

Chimili Pass, 11-12000ft, 16 v 1919, Farrer 926 (holo. E; iso. BM). R. stewartianum Diels var.

aiolosalpinx (Balfour f. & Farrer) Cowan & Davidian, Rhododendron Yearbook 6: 177

(1951). R. stewartianum Diels var. tantulum Cowan & Davidian, ibid. 6: 177 (1951). Type:

China, SE Xizang, Salween/Kiu-chiang divide, W of Si K’ai, vi 1922, Forrest 21918 (holo. E)

Notes

References

Chamberlain, D.F. (1982) A Revision of Rhododendron II. Subgenus Hymenanthes. Notes From the Royal Botanic Garden Edinburgh 39(2):426