Rhododendron tomentosum Harmaja

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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 2021-08-02.

Genus

Other taxa in genus

Glossary

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 2021-08-02.

Small, erect or decumbent shrub, 0.3-1.2 m; 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, 4-8 mm; stamens 7-10; ovary glandular, style glabrous. Flowering June-July. Royal Horticultural Society (1997)

Distribution  Holarctic

Habitat s.l.-2,000 m

RHS Hardiness Rating H6

Conservation status Least concern (LC)


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.

Taxonomic note (Ledum minus hort., L. palustre L. var. decumbens Aiton, R. subarcticum Harmaja)


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.

Taxonomic note (Ledum palustre L.)