Muscol. Recent., suppl. 4: 79. 1818,
Illustrator: Patricia M. Eckel
Habitat: Dry, exposed areas, mostly with high light intensity, acidic or seldom calciferous soil and rocks, boulders, cliffs, ledges, scree and in fellfields, polar tundra and tundra-like barrens in mountains, hummocks in peatland and moorland, over raw earth of bog margins
Elevation: low to high elevations (0-2300 m)
Greenland, Alta., B.C., Man., Nfld. and Labr., N.W.T., N.S., Nunavut, Ont., Que., Yukon, Alaska, Calif., Idaho, Maine, Mont., N.H., Oreg., Wash., Central America (Costa Rica), South America (Argentina, Chile, Colombia, Ecuador, Peru), Europe, arctic and temperate Asia (including Borneo, Java, New Guinea, Sumatra), South Africa, Atlantic Islands (Azores, Canary Islands, Falkland Islands, Gough Island, Iceland, Madeira, South Georgia, Tristan da Cunha), Indian Ocean Islands (Heard Island, Îles Crozet, Îles Kerguelen, Prince Edward Islands, Réunion), Pacific Islands (Hawaiian Islands, New Zealand), Australia, Antarctica (Deception Island).
Racomitrium lanuginosum is widely distributed throughout the Nearctic and Greenland, where it reaches the highest possible latitudes, becoming rare and scattered southwards. It usually occupies habitats of varying moisture regimes, but exhibits a tendency for growing in exposed, dry, and insolated situations. The often extensive and tumid patches of it found on rocks and soil are mostly hoary when dry. This is due to the very long hyaline awns that at once separate it from all other species of the broadly conceived Racomitrium. The shape of the hair-points is unique not only in the Grimmiaceae but among the mosses. Niphotrichum species often have a similar hoary appearance due to their long, papillose, hair-pointed leaves, but they differ from R. lanuginosum in having non-decurrent awns and tall, stout, conical papillae distributed over the leaf cell lumina, as well as large and often decurrent hyaline alar cells.
The laminal papillae of Racomitrium lanuginosum are identical to those of the genus Codriophorus, but species of that genus are usually readily distinguished by their muticous leaves. The only exception is C. varius, which often has pilose leaves but the awns are non-decurrent, smooth to faintly denticulate, and never papillose. Moreover, it has long-cylindric capsules, smooth setae, and very long, 1–1.8 mm peristome teeth, but in general sporophytes are produced infrequently in R. lanuginosum.
|Author||Ryszard Ochyra + and Halina Bednarek-Ochyra +|
|Authority||(Hedwig) Bridel +|
|Basionyms||Trichostomum lanuginosum +|
|Distribution||Greenland +, Alta. +, B.C. +, Man. +, Nfld. and Labr. +, N.W.T. +, N.S. +, Nunavut +, Ont. +, Que. +, Yukon +, Alaska +, Calif. +, Idaho +, Maine +, Mont. +, N.H. +, Oreg. +, Wash. +, Central America (Costa Rica) +, South America (Argentina +, Chile +, Colombia +, Ecuador +, Peru) +, Europe +, arctic and temperate Asia (including Borneo +, Java +, New Guinea +, Sumatra) +, South Africa +, Atlantic Islands (Azores +, Canary Islands +, Falkland Islands +, Gough Island +, Iceland +, Madeira +, South Georgia +, Tristan da Cunha) +, Indian Ocean Islands (Heard Island +, Îles Crozet +, Îles Kerguelen +, Prince Edward Islands +, Réunion) +, Pacific Islands (Hawaiian Islands +, New Zealand) +, Australia + and Antarctica (Deception Island). +|
|Elevation||low to high elevations (0-2300 m) +|
|Habitat||Dry, exposed areas, mostly with high light … |
Dry, exposed areas, mostly with high light intensity, acidic or seldom calciferous soil and rocks, boulders, cliffs, ledges, scree and in fellfields, polar tundra and tundra-like barrens in mountains, hummocks in peatland and moorland, over raw earth of bog marginsnd moorland, over raw earth of bog margins +
|Illustrator||Patricia M. Eckel +|
|Publication title||Muscol. Recent., suppl. +|
|Source xml||https://email@example.com/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse grained fna xml/V27/V27 403.xml +|
|Synonyms||Grimmia sect. Racomitrium +, Racomitrium sect. Lanuginosa + and Trichostomum sect. Racomitrium +|
|Taxon family||Grimmiaceae +|
|Taxon name||Racomitrium lanuginosum +|
|Taxon parent||Racomitrium +|
|Taxon rank||species +|
|Volume||Volume 27 +|