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Rhododendron oreogenum R. ef Til O R. fø

Rhododendron oreogenum

 R. oreogenum,from  frps.eflora.cn/frps/Rhododendron oreogenum

http://frps.eflora.cn/frps/Rhododendron oreogenum
R. oreogenum (Grandia ?) Bemærk de lange blomsterstilke som ikke ligner arter i Grandia og Arborea (meget korte i disse subsec.). De 5 kronblade passer heller ikke til Grandia. De lange blomsterstilke peger på Argyrophylla (H. Eiberg)
Flora of China
RBGE herbarium. R. oreogenum (no data)
241. Rhododendron oreogenum L. C. Hu, Acta Phytotax. Sin. 30: 541. 1992. ???? zang dong du juan Small trees, 4–5 m tall; young shoots ca. 6 mm in diam., sparsely grayish tomentose, soon glabrescent. Petiole terete, 15–20 mm, sparsely floccose; leaf blade leathery, oblong to ovate-oblong, 15–17 × 4–4.8 cm; base cuneate or broadly cuneate; margin slightly revolute; apex obtuse or acute and mucronate; abaxial surface silvery-white indumentum thin, compacted and agglutinated; adaxial surface glabrous, midrib markedly elevated abaxially, impressed adaxially; lateral veins 22–23-paired, conspicuous abaxially. Inflorescence racemose-umbellate, ca. 16-flowered; rachis ca. 25 mm, floccose. Pedicel 1–1.5 cm, densely pale brown-tomentose; calyx lobes 5, 1–1.5 mm, sparsely tomentose; corolla campanulate, bright crimson, purple within at base of tube, ca. 4 cm, lobes 5, suborbicular, emarginate; stamens 10, unequal, filaments glabrous; ovary 6–7 × ca. 3.5 mm, 6-locular, densely pale brown-tomentose; style slightly shorter than corolla and longer than stamens, glabrous; stigma slightly lobulate. Fl. May. Abies forests on mountain slopes; 2800–2900 m. SE Xizang (Mêdog). The 5-lobed corolla suggests that this species is only doubtfully a member of Rhododendron subsect. Grandia. It may be related to, or a synonym of, R. lanigerum in R. subsect. Arborea.