Rhododendron tomentosum Harmaja

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New article for Trees and Shrubs Online.

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'Rhododendron tomentosum' from the website Trees and Shrubs Online (treesandshrubsonline.org/articles/rhododendron/rhododendron-tomentosum/). Accessed 2020-01-28.

Genus

Infraspecifics

Other species in genus

Glossary

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Credits

New article for Trees and Shrubs Online.

Recommended citation
'Rhododendron tomentosum' from the website Trees and Shrubs Online (treesandshrubsonline.org/articles/rhododendron/rhododendron-tomentosum/). Accessed 2020-01-28.

Small, erect or decumbent shrub, 0.3-1.2m; young shoots ferruginous-lanate, glandular. Leaves 0.6-5 x 0.1-0.5(-1.2)cm, linear to narrowly elliptic-oblong, margin strongly revolute, upper surface dark green, dull, lower surface densely ferrugineous-lanate, epidermis with or without short setulose hairs, sometimes also with reddish glands, scales rimless, golden. Flowers many, in a loose terminal umbellate corymb; calyx minute; corolla white, rotate, 4-8mm; stamens 7-10; ovary glandular, style glabrous.

Season June-July.

Distribution Holarctic.

Habitat s.l.-2,000m.

RHS Hardiness H4.


subsp. subarcticum (Harmaja) G.Wallace

Leaves 0.6-2 x 0.1-0.3cm, lower epidermis with few or no setulose hairs.

Distribution Arctic regions of Europe, America and Russia, also Japan (Hokkaido) and Korea.

subsp. tomentosum

Leaves 1.2-5 x 0.2-0.5(-1.2)cm, lower epidermis covered with short setulose hairs.

Distribution N & C Europe, Russia (European part, extending to S Siberia).

Habitat s.l.-2,000m.

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