Juncus ensifolius

Wikstrom

Kongl. Vetenskaps Academiens Handlingar 2: 274. 1823.

Illustrated
Treatment appears in FNA Volume 22.

Herbs, perennial, rhizomatous, 2–6 dm. Rhizomes 2–3 mm diam. Culms erect, 2–6 mm diam. Cataphylls 0 or 1–2, straw-colored, apex narrowly acute. Leaves: basal 1–3, cauline 2–6, straw-colored; auricles absent; blade 2–25 cdm x 1.5–6 mm. Inflorescences panicles or racemes of 2–50 heads or heads solitary, 2–14 cm, erect or ascending branches; primary bract erect; heads 3–70-flowered, obovoid to globose, 7–11 mm diam. Flowers: tepals green to brown or reddish brown, lanceolate; outer tepals 2.7–3.6(–4) mm, apex acuminate; inner tepals 2.2–3(–3.5) mm, nearly equal, apex acuminate; stamens 3 or 6; anthers ½1/2 to equal filament length. Capsules included to slightly exserted, chestnut to dark brown, 1-locular, oblong, 2.4–4.3 mm, apex obtuse proximal to beak. Seeds elliptic to obovate, 0.4–1 mm, occasionally tailed.

Distribution

Alta., B.C., Ont., Que., Sask., Alaska, Ariz., Calif., Colo., Idaho, Mont., N.Mex., N.Y., Nev., Oreg., S.Dak., Tex., Utah, Wash., Wis., Wyo., introduced in Europe and East Asia.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

... more about "Juncus ensifolius"
Ralph E. Brooks* +  and Steven E. Clemants* +
Wikstrom +
Juncus sect. Ensifolii +
Alta. +, B.C. +, Ont. +, Que. +, Sask. +, Alaska +, Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, N.Mex. +, N.Y. +, Nev. +, Oreg. +, S.Dak. +, Tex. +, Utah +, Wash. +, Wis. +, Wyo. +  and introduced in Europe and East Asia. +
Kongl. Vetenskaps Academiens Handlingar +
Illustrated +
Juncus ensifolius +
Juncus subg. Ensifolii +
species +