Juncus stygius var. americanus

Buchenau

Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie 12: 393. 1890.

Common names: American moor rush
Synonyms: Juncus stygius subsp. americanus (Buchenau) Hultén
Treatment appears in FNA Volume 22.

Herbs, perennial, loosely cespitose, 2–4 dm. Rhizomes short, sparingly branched. Cataphylls 0–1. Leaves: basal 1–3, cauline 1–2; auricles rounded, scarcely prolonged, scarious; blade imperfectly septate (often inconspicuous), ascending, terete to slightly flattened, 8–18 cm × 0.5–1 mm, much reduced distally. Inflorescences glomerules, 1–3, each with 1–3 flowers; peduncles 0.2–1 cm, primary bracts nearly equal to or slightly surpassing glomerules. Flowers: bracteoles absent; tepals pale to reddish brown, lanceolate to lanceolate-ovate, 4–5 mm × 1 mm, apex acutish; outer and inner series nearly equal; stamens 6, filaments 2.5–3.5 mm, anthers 0.4–0.5 mm; style 1–1.2 mm. Capsules greenish to tan, pseudo-3-locular, ellipsoid, 5.5–9 × 1.8–2.6 mm. Seeds pale yellow, fusiform, body 0.8–1.1 mm, tails 1–1.4 mm.


Phenology: Flowering and fruiting mid-- to late summer.
Habitat: Wet moss, bogs, and bog-pools

Distribution

V22 182-distribution-map.jpg

Alta., B.C., N.B., Nfld. and Labr., Man., N.S., N.W.T., Nunavut, Ont., P.E.I., Que., Sask., Yukon, Alaska, Maine, Mich., Minn., N.Y., e Asia.Eurasia.

Discussion

Selected References

None.

Lower Taxa

None.
Ralph E. Brooks* +  and Steven E. Clemants* +
Buchenau +
American moor rush +
Alta. +, B.C. +, N.B. +, Nfld. and Labr. +, Man. +, N.S. +, N.W.T. +, Nunavut +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Alaska +, Maine +, Mich. +, Minn. +, N.Y. +  and e Asia.Eurasia. +
Wet moss, bogs, and bog-pools +
Flowering and fruiting mid-- to late summer. +
Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie +
Juncus stygius subsp. americanus +
Juncus stygius var. americanus +
Juncus stygius +
variety +