Log In New Account Sitemap
  • Home
  • Specimen Search
    • Search Collections
    • Map Search
    • Exsiccati Search
  • Images
    • Image Browser
    • Search Images
  • Flora Projects
    • Arizona
    • New Mexico
    • Colorado Plateau
    • Plant Atlas of Arizona (PAPAZ)
    • Sonoran Desert
    • Teaching Checklists
  • Agency Floras
    • NPS - Intermountain
    • USFWS - Region 2
    • BLM Flora
    • Coronado NF
    • Tonto NF
  • Dynamic Floras
    • Dynamic Checklist
    • Dynamic Key
  • Additional Websites
    • New Mexico Flores
    • Plant Atlas Project of Arizona (PAPAZ)
    • Southwest Colorado Wildflowers
    • Vascular Plants of the Gila Wilderness
    • Consortium of Midwest Herbaria
    • Consortium of Southern Rocky Mountain Herbaria
    • Intermountain Region Herbaria Network (IRHN)
    • Mid-Atlantic Herbaria
    • North American Network of Small Herbaria (NANSH)
    • Northern Great Plains Herbaria
    • Red de Herbarios del Noroeste de México (northern Mexico)
    • SERNEC - Southeastern USA
    • Texas Oklahoma Regional Consortium of Herbaria (TORCH)
  • Resources
    • Symbiota Docs
    • Video Tutorials
    • Collections in SEINet
    • Joining a Portal
Rhododendron tomentosum Harmaja  
Family: Ericaceae
Marsh Labrador-Tea
[Ledum palustre L., moreLedum palustre subsp. decumbens (Aiton) Hultén, Ledum palustre var. decumbens Aiton, Ledum palustre var. dilatatum Wahlenb., Ledum palustre var. palustre , Rhododendron tomentosum subsp. subacrticum (Harmaja) G. Wallace]
Rhododendron tomentosum image
  • FNA
  • Resources
Walter S. Judd, Kathleen A. Kron in Flora of North America (vol. 8)
Shrubs, to 0.5 m, rhizomatous. Stems creeping or prostrate; bark ± smooth; twigs unicellular-hairy and with flattened, glandular scales, scales often obscured by dense, ferruginous, long-crisped, multicellular hairs. Leaves persistent, (fragrant when crushed); petiole with unicellular and/or peltate scales and, sometimes, ferruginous, long-crisped hairs; blade ± linear, 2-5 × 1-4 cm (often much longer than wide), coriaceous, margins entire, revolute, glabrous, apex acute, abaxial surface with sparse to dense, glandular-peltate scales without broad rim, scales often obscured by dense (to sparse), ferruginous, long-crisped, multicellular hairs sometimes forming dense, ± uniform mat, adaxial surface rugose with scattered, lepidote scales and sometimes also with white, unicellular hairs along impressed midrib, midrib usually lanate. Floral bud scales with lepidote scales and unicellular-hairy abaxially, margins unicellular-hairy. Inflorescences slightly rounded, 10-35-flowered; bracts lepidote abaxially, margins ciliate, long-crisped-hairy, sometimes also unicellular-hairy. Pedicels 5-26 mm, sparsely eglandular-hairy (hairs ferruginous, elongated), with ferruginous, long-crisped, unicellular and/or peltate scales, sometimes also long-stalked, multicellular glandular-hairy. Flowers radially symmetric, opening after leaves (of flowering shoots), ± erect, not fragrant; calyx lobes ca. 1 mm, outer surface densely to sparsely unicellular-hairy (hairs tan), and multicellular, stipitate-glandular-hairy (hairs red) on margins; corolla white to cream, without blotch, ± rotate, 2-8 mm, inner surface often densely unicellular-hairy, petals appearing distinct or only slightly connate basally, lobes 5-7 mm; stamens 10, exserted, ± equal, 4.4-8.5 mm. Capsules borne on apex of sharply recurved pedicels, 2.5-5 × 1-3 mm (only slightly longer than wide), with sparse to dense, lepidote scales, acropetally dehiscent. Seeds somewhat elongated beyond narrow ends; testa closely appressed. 2n = 26, 52. Flowering spring-summer. Bogs, muskeg, tundra, raised beach ridges; 0-1800 m; Greenland; Alta., B.C., Man., Nfld. and Labr. (Nfld.), N.W.T., Nunavut, Ont., Que., Sask., Yukon; Alaska; Europe; Asia.
Rhododendron tomentosum
Open Interactive Map
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Rhododendron tomentosum image
Click to Display
100 Initial Images
- - - - -
View All Images
The National Science Foundation
Development supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)
Powered by Symbiota