Andreaea megistospora

Andreaea megistospora B.M. Murray:
Canada (North America)
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.

Canada

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

Global Range: Subspecies megistospora is disjunct known from Europe and western North America: Scotland, England, Ireland, Norway, British Columbia, Alaska, Washington. Subspecies epapillosa is a western North American endemic known only from British Columbia and Alaska.

Plants brown to black. Leaves erect-spreading or secund, subulate-lanceolate from an ovate base, widest in proximal half of leaf, apex symmetric; costa present, percurrent and sometimes filling the leaf apices, strong but narrow, bulging abaxially, usually reaching the leaf insertion; leaf margins entire or occasionally weakly crenulate; basal laminal cells quadrate to short-rectangular, marginal cells mostly rounded-quadrate, walls weakly pitted-sinuose; medial laminal cells rounded-quadrate, 1-stratose or 2-stratose in patches or completely, lumens rounded; laminal papillae smooth to papillose. Sexual condition cladautoicous or gonioatoicous; perichaetial leaves differentiated, convolute-sheathing. Spores (40-)50-90(-110) µm.

Andreaea megistospora var. epapillosa (B. M. Murray) H. A. Crum & L. E. Anderson; A. megistospora subsp. epapillosa B. M. Murray

Comments: Murray (1987) summarizes the overall habitat as, ". occurs on acidic rock from near sea level to subalpine elevations in regions with a cool, hyperoceanic climate. It has been found at elevations from near 0 to 60 m in North America and from 10-700 m (one collection from 1,100 m) in Scotland. At a finer scale, the species occurs on dry, open, sunny or exposed rock surfaces, usually acidic (eg. granite, granodiorite, quartzite, and sandstone), often in bogs. According to Schofield (1976), (as A. rothii), in British Columbia is grows "on dryish acidic rock from near sea-level to sub-alpine elevations, normally in exposed sites that dry out rapidly."

Canada

Rounded National Status Rank: NNR - Unranked

United States

Rounded National Status Rank: NNR - Unranked

Rounded Global Status Rank: G4 - Apparently Secure

Reasons: Andreaea megistospora is known from at least 176 locations worldwide.