Luzula arcuata subsp. unalaschkensis

(Buchenau) Hulten

Arkiv for Botanik utgivet av K. Svenska Vetenskapsakademien n.s. 7:32. 1968.

Illustrated
Basionym: Luzula arcuata var. unalaschkensis Buchenau Bot. Jahrb. Syst. 12: 124. 1890
Synonyms: Luzula arcuata var. kamtschadalorum Samuelsson Luzula beringensis Luzula kamtschadolarum Luzula unalaschkensis Luzula unalaschkensis subsp. kamtschdalorum (Samuelsson) Tolmachev
Treatment appears in FNA Volume 22.

Stolons short to (rarely) 15 cm. Culms loosely cespitose, usually slightly arched, 15–30 cm, thin. Leaves: sheaths brownish purple, throats rounded, densely pilose; basal leaves flat, 8–15 cm × 3–5 mm, not reaching inflorescences, margins pubescent; cauline leaves 1–3, smaller than basal, not reaching inflorescences. Inflorescences corymbose, proximal branch longest; glomerules 8–15 (each with 3–5 flowers, sometimes reduced to 1–2 flowers), pedunculate, capitate or spicate; branches mostly arching in same direction (often branching at apex); proximal inflorescence bract bladeless; bracts and bracteoles brown, ciliate. Flowers: tepals light brown, (margins ± ciliate, apex acuminate, usually distinctly awned), 1.8–3 mm; anthers ± equaling filament length. Capsules brown, ellipsoid, shorter than tepals; (beak short). Seeds brown (with few hairs present), 1 mm, few hairs present; caruncle generally indistinct. 2n = 36.


Phenology: Flowering and fruiting summer.
Habitat: Rocky to gravelly snow patches on mountains, dry to mesic meadows, and patches of bare soil in heaths
Elevation: 50–2500 m

Distribution

V22 217-distribution-map.jpg

Alta., B.C., N.W.T., Yukon, Alaska, Mont., Wash., e Asia.

Discussion

In Luzula arcuata subsp. unalaschkensis the sheath throats are rounded and densely pilose; basal leaves are flat with pubescent margins.

Selected References

None.

Lower Taxa

None.
Janice Coffey Swab +
(Buchenau) Hulten +
Luzula arcuata var. unalaschkensis +
Alta. +, B.C. +, N.W.T. +, Yukon +, Alaska +, Mont. +, Wash. +  and e Asia. +
50–2500 m +
Rocky to gravelly snow patches on mountains, dry to mesic meadows, and patches of bare soil in heaths +
Flowering and fruiting summer. +
Arkiv for Botanik utgivet av K. Svenska Vetenskapsakademien +
Illustrated +
Luzula arcuata var. kamtschadalorum +, Luzula beringensis +, Luzula kamtschadolarum +, Luzula unalaschkensis +  and Luzula unalaschkensis subsp. kamtschdalorum +
Luzula arcuata subsp. unalaschkensis +
Luzula arcuata +
subspecies +