Rhododendron tschonoskii var. trinerve / tetramerum

Billeder af Rhododendron tschonoskii var. trinerve

Beskrivelse

R. (tschonoskii var.) trinerve (Tsutsusi) har større blade op til 3.5 cm og findes kun på Honshu, Japan ved 700-1000 m.
Hans Eiberg

R. (tschonoskii var.) tetramerum

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ARS
Flora of China
Kew’s Herbarium
R. tschonoskii-alliance
RBGE Herbarium; R. tschonoskyi (no data)
R. tschonoskyi in Japan page 56

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Trees and Shrubs Online; R. tschonoskyi Maxim.

Much-branched shrub, 0.3–1.5 m; young shoots and petioles densely covered with adpressed flattened rufous hairs. Leaves of one kind, 1–3.5 × 0.3–1 cm, lanceolate to elliptic, apex acute, both surfaces with scattered adpressed whitish to pale brown villose hairs, especially on the midrib. Pedicels covered with adpressed whitish hairs. Flowers 3–6 per inflorescence; calyx minute; corolla white, funnel-shaped, 7–9 mm; stamens 4–5; ovary densely covered with pale brown bristles, style glabrous. Flowering May. Royal Horticultural Society (1997)

Distribution  Japan South Korea Russia Kamschatka

Habitat 700–1,800 m

RHS Hardiness Rating H6

Conservation status Least concern (LC)

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var. trinerve (Franch.) Makino

Leaves 3-nerved, 2–3.5cm.

Habitat 700–1,000m.

Both varieties of this distinctive species are cultivated.

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var. tschonoskyi

Leaves 4–5-nerved, 1–2cm.

Distribution S Korea, Japan, Russia (Kamschatka).

Habitat 1,500–1,800m.