Rhododendron tutcherae var. glabrifolium

Billeder af Rhododendron tutcherae var. glabrifolium

Beskrivelse

R. tutcherae var. glabrifolium (Choniastrum). Buske eller små træer, op til 15 m med duftende rør-, tragt- formede blomster (marts-april). Kun i N. Vietnam.
Hans Eiberg

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RBGE Herbarium; R. tutcherae
www.plantsoftheworldonline.org Herbarium; R. tutcherae

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Flora of China

Trees, up to 15 m tall; branches slender, sparsely setose and pubescent when young, shortly setose or glabrescent when mature. Petiole stout, ca. 10 mm, sparsely setose; leaf blade thickly leathery, narrowly oblanceolate or oblong-lanceolate, 8–13 × 1.8–3 cm; base cuneate or broadly cuneate; margin slightly revolute; apex shortly caudate-acuminate; abaxial surface entirely glabrous or sparsely short-setose; midrib and lateral veins impressed above, prominent below. Inflorescence subapical, 1–3-flowered, rachis ca. 4 mm, puberulent. Pedicel 1.5–2 cm, sparsely reddish setose or glabrous; calyx shallowly lobed, small; corolla narrowly funnelform, cherry-red, 3–4.5 cm, tube subcylindrical, ca. 10 mm; lobes spreading, elliptic, ca. 2.5 cm, apex obtuse or rounded; stamens 10, unequal, slightly shorter than corolla, filaments puberulent below; ovary cylindric, truncate at apex ca. 9 mm, glabrous or upper part coarsely appressed-puberulent; style glabrous. Capsule cylindric, apex truncate, 30–40 × 5–6 mm. Fl. Mar–Apr, fr. Sep–Nov. Evergreen broad-leaved forests, subalpine forests, woods; 1200–2000 m. S Yunnan [N Vietnam]. The label of the type specimen describes the corolla as violet.

1 Abaxial leaf surface glabrous. 483c var. glabrifolium
+ Abaxial leaf surface sparsely short-setose. (2)

2 (1) Ovary coarsely puberulent; pedicel sparsely setose or glabrous. 483a var. tutcherae
+ Ovary and pedicels glabrous. 483b var. gymnocarpum