Andreaea heinemannii

Hampe & Müller Hal.

Bot. Zeitung (Berlin) 4: 324, plate 2. 1846,

Synonyms: Andreaea blyttii var. angustata (Limpricht) Schultze-Motel Andreaea blyttii var. obtusifolia (Berggren) Sharp Andreaea crassinervia var. obtusifolia Berggren
Treatment appears in FNA Volume 27. Treatment on page 106. Mentioned on page 103.
Plants brown to black. Leaves erect to spreading, occasionally secund, broadly subulate from an ovate base, widest in proximal half of leaf, apex symmetric; costa present, percurrent and filling the leaf apices, weak, flattened distally, often not reaching the leaf insertion; leaf margins entire or occasionally weakly crenulate; basal laminal cells quadrate to occasionally short-rectangular, a few marginal cells rectangular, walls usually sinuose; medial laminal cells quadrate, 1-stratose or sometimes 2-stratose in patches, lumens rounded-quadrate; laminal papillae rare, low. Sexual condition apparently autoicous; perichaetial leaves differentiated, convolute-sheathing. Spores 20–30(–40) µm.

Habitat: Acidic rocks
Elevation: low to moderate elevations

Distribution

V27 118-distribution-map.gif

Greenland, B.C., Yukon, Alaska, Calif., Colo., Oreg., s Europe, se Asia, Atlantic Islands (Canary Islands, Kerguelen Island, Madiera Island).

Discussion

Andreaea heinemannii is a relatively small species in the genus, having irregularly divergent leaf apices of a flat subula. The weak costa commonly does not reach the leaf insertion, and this species may be mistaken for A. rupestris.

References

None.

Lower Taxa

No lower taxa listed.