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Wahlenberg's wood rush

northern wood-rush

Rhizomes

short.

0.5–1 cm.

Culms

cespitose, 15–30(–35) cm.

cespitose, stiffly erect, 3–28 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.

sheaths reddish;

basal leaves (persisting for several seasons,) reddish, exceeding inflorescence to as short as cauline leaves, glabrous;

cauline leaves 2–3, reddish, rarely to 6 cm, often reaching or exceeding inflorescence, 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.

glomerules 1–4, pedunculate;

main branches 1–3(–4), arching in 1 direction, 1–4 cm, terminated by 2–several peduncles each bearing 1–5 flowers;

peduncles 2 mm;

;

proximal inflorescence bract usually inconspicuous, though variable in size and shape;

bracts and bracteoles conspicuous, clear to deep brown, margins lacerate to fimbriate to abundantly ciliate.

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 dark brown with clear apex, 1.6–2.6 mm;

outer whorl longer than inner whorl;

anthers ca. 2 times filament length;

stigmas much exceeding styles.

Capsules

dark brown, less than 2.5 mm, slightly longer than tepals;

beak absent.

dark brown, ovoid, ± equaling to shorter than tepals.

Seeds

dark reddish brown, cylindric, 1.2–1.6 mm;

caruncle essentially absent.

dark brown, (with tuft of fine tangled hairs), ellipsoid, 0.8–1.2 mm.

2n

= 24.

= 36.

Luzula wahlenbergii

Luzula confusa

Phenology Flowering and fruiting late summer. Flowering and fruiting late summer.
Habitat Wet mossy arctic and alpine tundra, lake shores, alluvial rivers, shores of alpine creeks, gneissic seashores Wet, exposed rocky and sandy hillsides, lichen tundra, and mountain summits, growing where it may be practically only vascular plant
Elevation 40–600 m (100–2000 ft) circumpolar; 500–1300 m (circumpolar; 1600–4300 ft)
Distribution
from FNA
AK; BC; MB; NT; NU; QC; YT; Greenland; Eurasia
[BONAP county map]
from FNA
AK; ME; NH; VT; BC; LB; MB; NT; NU; ON; QC; SK; YT; Greenland; Eurasia
[BONAP county map]
Discussion

Basal leaves and cauline leaves (numbering 2 or 3) are reddish and glabrous in Luzula confusa. Inflorescences have 1–3(–4) main branches terminated by 2–several peduncles, each bearing 1–5 flowers. The flowers are characterized by stigmas that much exceed the styles in length.

(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
L. acuminata, L. arctica, L. arcuata, L. bulbosa, L. campestris, L. comosa, L. confusa, L. divaricata, L. echinata, L. groenlandica, L. hitchcockii, L. kjellmaniana, L. luzuloides, L. multiflora, L. orestera, L. pallidula, L. parviflora, L. piperi, L. rufescens, L. spicata, L. subcapitata, L. subcongesta
L. acuminata, L. arctica, L. arcuata, L. bulbosa, L. campestris, L. comosa, L. divaricata, L. echinata, L. groenlandica, L. hitchcockii, L. kjellmaniana, L. luzuloides, L. multiflora, L. orestera, L. pallidula, L. parviflora, L. piperi, L. rufescens, L. spicata, L. subcapitata, L. subcongesta, L. wahlenbergii
Name authority Ruprecht: Fl. Samojed. Cisural. 58. (1845) Lindeberg: Bot. Not. 1855: 9. (1856)
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