Luzula wahlenbergii |
Luzula orestera |
|
---|---|---|
Wahlenberg's wood rush |
alpine woodrush, heath wood rush, Sierra woodrush |
|
Rhizomes | short. |
|
Culms | cespitose, 15–30(–35) cm. |
densely cespitose, stiffly erect, reddish brown, 3–26 cm. |
Leaves | sheath throat acutely angled, pilose; basal leaf blade 5–10 cm × 3–8 mm, apex short acuminate, mostly glabrous; cauline leaves (1–)2–4, 3–5 cm × 2–4 mm. |
basal leaves reddish, 2.5–7 cm × 2–5 mm, firm, apex callous, glabrous. |
Inflorescences | anthelate, few flowered; main branches generally 2–4, spreading less than 90°, lax, usually arching; proximal inflorescence bract 1 cm or less; bracts and bracteoles brown; margins with long curly cilia. |
pyramidal, 5–10 mm wide; glomerules 1–5, sessile, sometimes with 1–2 smaller glomerules on short peduncles; proximal inflorescence bract conspicuous, reddish, usually exceeding inflorescence, generally stiff; bracteoles clear. |
Flowers | solitary on short pedicels; tepals dark purplish brown (margins finely lacerate toward apex), 2–2.5 mm, margins finely lacerate toward apex, apex acute, not reflexed; anthers ± equaling filament length; stigmas 2 times style length. |
tepals very dark with clear margins, 2–3 mm; outer whorl slightly exceeding inner whorl; anthers ± equaling filaments. |
Capsules | dark brown, less than 2.5 mm, slightly longer than tepals; beak absent. |
dark brown to black in distal portion, much shorter than tepals; (beak 0.3 mm). |
Seeds | dark reddish brown, cylindric, 1.2–1.6 mm; caruncle essentially absent. |
dark brown, oval, 0.8 mm; caruncle about 0.2 mm. |
2n | = 24. |
= 20, 22. |
Luzula wahlenbergii |
Luzula orestera |
|
Phenology | Flowering and fruiting late summer. | Flowering and fruiting summer. |
Habitat | Wet mossy arctic and alpine tundra, lake shores, alluvial rivers, shores of alpine creeks, gneissic seashores | Alpine and subalpine meadows, fell-fields |
Elevation | 40–600 m (100–2000 ft) | 2700–3600 m (8900–11800 ft) |
Distribution |
AK; BC; MB; NT; NU; QC; YT; Greenland; Eurasia |
CA
|
Discussion | The culms of Luzula orestera are reddish brown and stiffly erect; basal leaves are reddish, firm, and glabrous with an overlapping arrangement. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Juncaceae > Luzula > subg. Anthelaea | Juncaceae > Luzula > subg. Luzula |
Sibling taxa | ||
Synonyms | L. campestris var. congesta, L. campestris var. sudetica | |
Name authority | Ruprecht: Fl. Samojed. Cisural. 58. (1845) | Sharsmith: Aliso 4: 125. (1958) |
Web links |