Tayloria acuminata

Plants 0.5–1 cm, in loose tufts, bright green. Stems sometimes branched. Leaves crowded at stem and branch apices, slightly crisped, erect and moderately contorted when dry, ovate-lanceolate, 3 × 0.7–1 mm; margins recurved and entire proximally, irregularly serrate distally; apex long-acuminate; costa ending 5–9 cells before apex. Specialized asexual reproduction by brood bodies on radicles. Sexual condition autoicous. Seta yellow, red with age, 0.6–1.5 cm, slightly twisted when dry, slender. Capsule cylindric, urn 0.5–1.5 mm when dry, 0.8–2 mm when moist; hypophysis same color as urn or somewhat more pale, 3 mm; columella not or barely exserted when dry; operculum deciduous, short-conic, apex blunt, often slightly oblique; peristome inserted below mouth; exostome teeth 16, split into 32 linear-lanceolate filaments, reflexed inrolled when dry, red-brown, narrowly lanceolate. Spores 15–18 µm, finely papillose.

Phenology: Capsules mature summer.
Habitat: Damp places, humus, rotten logs, rock
Elevation: low to high elevations

Alta., B.C., Man., N.W.T., Nunavut, Ont., Que., Yukon, Alaska, Idaho, Mont., Nev., Wash., Wyo., n, c Europe, n, c Asia.

Discussion

Tayloria acuminata has more slender gametophytes and sporophytes than T. splachnoides, which bears a close resemblance. The leaves of T. acuminata are also more pointed, the columella is not or barely exserted upon drying of the capsule, and the operculum is short-conic and only 0.5–0.6 mm high. The exostome of T. acuminata is tightly rolled inside the urn and usually hidden when moist, loosely rolled and more or less reflexed when dry; the brood bodies are small, clavate, of 2–4 cells, and papillose.

Selected References

None.

Lower Taxa