Luzula divaricata |
Luzula groenlandica |
|
---|---|---|
fork wood rush |
Greenland wood rush |
|
Rhizomes | thick. |
|
Culms | densely cespitose, reddish, 6–30 cm × 2 mm. |
cespitose, straight, 10–30 cm, stiff. |
Leaves | basal leaves numerous, blade to 20 cm × 4–6 mm, sometimes longer than stem, apex long-pointed to 12 mm, mostly glabrous; cauline leaves 2–3. |
basal leaves (with several outer dead ones usually present), to 9 cm × 3 mm, apex callous, sparingly pilose; cauline leaves to 5 cm × 2 mm. |
Inflorescences | 5–15 cm, width 1/2 to equaling length; branches widely spreading to 90°, stiff, not drooping; proximal bract inconspicuous, less than 2 cm; bracts and bracteoles clear, margins slightly lacerate, often with a few cilia. |
glomerules 1(–3); peduncles, not exceeding 5 mm; proximal inflorescence bract conspicuous, leaflike, usually conspicuously exceeding inflorescence; bracts mostly inconspicuous; bracteoles clear or light to dark brown, occasionally to 1/2 tepal length. |
Flowers | solitary; tepals pale brown with reddish tint, 1.8–2.4 mm, apex reflexed, long-acuminate; outer whorl slightly longer than inner whorl; anthers ± equaling filaments; stigmas 3 times style length. |
tepals with broad clear margins and apex (apex acute-acuminate), 1.9–2.5 mm, apex acute-acuminate; outer whorl ± equaling to exceeding inner whorl; anthers ± equaling filaments. |
Capsules | deep reddish brown, shorter to slightly longer than tepals. |
dark reddish, shining, ovoid, generally shorter than tepals. |
Seeds | light brown, 1.2 mm. |
translucent, brown, ellipsoid, 0.9–1.1 mm; caruncle barely visible. |
2n | = 24. |
|
Luzula divaricata |
Luzula groenlandica |
|
Phenology | Flowering and fruiting summer. | Flowering and fruiting summer. |
Habitat | Subalpine forest to alpine granitic slopes | Sandy sea shores with herbaceous vegetation to turfy tundra, often by water, to alpine flats |
Elevation | 2100–3700 m (6900–12100 ft) | 0–400 m (0–1300 ft) |
Distribution |
CA; ID; NV; OR; WA
|
AK; BC; LB; MB; NT; NU; QC; YT; Greenland |
Discussion | The culms of Luzula divaricata are reddish colored. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
The culms of Luzula groenlandica are straight and stiff; basal leaves are sparingly pilose. (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 | ||
Name authority | S. Watson: Proc. Amer. Acad. Arts 14:302. (1879) | Böcher: Meddelelser om Gronland 147: 18. (1950) |
Web links |