Arctoa hyperborea

(Gunnerus ex Withering) Bruch & Schimper

Bryol. Europ. 1: 157. 1846,

Basionyms: Bryum hyperboreum Gunnerus ex Withering Syst. Arr. Brit. Pl. ed. 4, 3: 811. 1801
Synonyms: Cynodontium hyperboreum (Gunnerus ex Withering) Hagen Dicranum hyperboreum (Gunnerus ex Withering) Smith
Treatment appears in FNA Volume 27. Treatment on page 363. Mentioned on page 362.
Click plate for higher resolution version.
Illustrator: Patricia M. Eckel
Plants in compact, dark green tufts. Stems 1–3(–5) cm. Leaves erect-spreading, lanceolate, subulate, 2–3 mm; costa 30–55 µm wide at base, short-excurrent, rough near tip; distal laminal cells mostly subquadrate (1–2:1), incrassate; basal laminal cells elongate, alar cells differentiated, quadrate or slightly enlarged. Seta 4–6(–8) mm. Capsule exserted, slightly curved, obscurely to distinctly ribbed when dry, annulus developed, separating; peristome large, not spreading outward when dry. Spores 18–30 µm.

Phenology: Capsules mature summer.
Habitat: Siliceous rock or soil
Elevation: high-alpine elevations

Discussion

Arctoa hyperborea is a rare arctic-alpine moss found on rock ledges or crevices at high elevations. It is distinguished from other species of the genus by its short-excurrent costa, shorter seta (the length is highly variable), and peristome not spreading when dry.

References

None.

Lower Taxa

No lower taxa listed.

Facts about "Arctoa hyperborea"
AuthorSteven G. Newmaster +
Authority(Gunnerus ex Withering) Bruch & Schimper +
BasionymsBryum hyperboreum +
DistributionGreenland + and Europe. +
Elevationhigh-alpine elevations +
HabitatSiliceous rock or soil +
IllustratorPatricia M. Eckel +
PhenologyCapsules mature summer. +
Publication titleBryol. Europ. +
ReferenceNone +
Source xmlhttps://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse grained fna xml/V27/V27 508.xml +
SynonymsCynodontium hyperboreum + and Dicranum hyperboreum +
Taxon familyDicranaceae +
Taxon nameArctoa hyperborea +
Taxon parentArctoa +
Taxon rankspecies +
VolumeVolume 27 +