Luzula wahlenbergii |
Luzula bulbosa |
|
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Wahlenberg's wood rush |
bulbous wood rush |
|
Rhizomes | short. |
short, slender, bearing few to several white, swollen (storage) leaf bases. |
Culms | cespitose, 15–30(–35) cm. |
weakly cespitose or solitary, 8–40 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 few; cauline leaves 2–3, to 17 cm × 7 mm, margins scarcely to densely ciliate. |
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. |
glomerules 3–20 (each with 6–20 flowers), central glomerules sessile or nearly sessile, cylindric, 5–12 × 5–7 mm; peduncles straight, erect, 0.5–7 cm; proximal inflorescence bract leaflike (margins pilose), shorter than inflorescence, margins pilose; bracts purplish with long clear apex, sheathing, margins sparsely to densely ciliate; bracteoles white-clear, shining, margins fimbriate. |
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 with shining chestnut centers and usually wide clear margins and apex, 2–3 mm; outer whorl usually exceeding inner whorl, at least by awned tip; anthers 1–2 times filament length; stigmas 3–4 times length of styles. |
Capsules | dark brown, less than 2.5 mm, slightly longer than tepals; beak absent. |
brown, shining, obovoid (apex truncate), equal or longer than tepals, apex truncate. |
Seeds | dark reddish brown, cylindric, 1.2–1.6 mm; caruncle essentially absent. |
dark brown, ellipsoid, 0.9–1.3 mm; caruncle 0.5–0.7 mm. |
2n | = 24. |
= 12. |
Luzula wahlenbergii |
Luzula bulbosa |
|
Phenology | Flowering and fruiting late summer. | Flowering and fruiting spring–early summer. |
Habitat | Wet mossy arctic and alpine tundra, lake shores, alluvial rivers, shores of alpine creeks, gneissic seashores | Dry situations in woods and fields 50–600 m |
Elevation | 40–600 m (100–2000 ft) | |
Distribution |
AK; BC; MB; NT; NU; QC; YT; Greenland; Eurasia |
AL; AR; CT; DC; DE; FL; GA; IL; IN; KS; KY; LA; MA; MD; MO; MS; NC; NJ; NY; OH; OK; PA; SC; TN; TX; VA; WV
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Discussion | Luzula bulbosa has slender rhizomes that bear few to several white, swollen (storage) leaf bases; cauline leaves (numbering 2–3) have scarcely to densely ciliate margins; flowers have stigmas 3–4 times the length of the styles. (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. bulbosa | |
Name authority | Ruprecht: Fl. Samojed. Cisural. 58. (1845) | (A. Wood) B. B. Rydberg: Brittonia 1: 85. 1931Smyth, B. B. & L. C. R. Smyth, Trans. Kansas A |
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