Stems arising singly from a slender rhizome, 2-6 dm, with 1-5 adjacent hemispheric heads, these 2-8-fld, 8-15 mm thick; lvs mostly basal; 1 or 2 short cauline lvs often developed; sep carinate, lanceolate, 4.4-5.7 mm, acuminate, narrowly scarious-margined; pet oblong with broad scarious margins, 4.5-6 mm, acute; stamens 6, considerably shorter than the tep; anthers light yellow, 2-2.5 mm, longer than the filaments; fr trilocular, ellipsoid, 4-5 mm, half as thick, with a beak 0.5-1 mm; seeds ca 0.5 mm, apiculate at both ends; 2n=40. Damp meadows and shores; widespread in the w. cordillera, e. to Neb. and nw. Minn.; w. Ont.; Nf.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
FNA 2000, Martin and Hutchins 1980, Kearney and Peebles 1969
Common Name: longstyle rush Duration: Perennial Nativity: Native Lifeform: Graminoid General: Perennial from long creeping rhizomes, 20-60 cm tall. Vegetative: Slightly compressed stems, leaves basal 2-5, cauline 1-3, with well-developed auricles 1-2.5 mm, apex truncate to obtuse; blade flat 10-30 cm long by 1.5-3 mm wide, cauline leaves shorter; sheaths scarious margined. Inflorescence: Glomerules 1-4, each with 3-12 flowers, open or aggregate, 2-6 cm, the primary bract shorter than inflorescence; tepals brown with green midstripe, lanceolate, 5-6 mm, scarious margins, sometimes papillose; outer series slightly shorter, 6 stamens, filaments 0.5-1 mm, anthers 1-2 mm, style about 0.5 mm; capsules tan, 3-locular, obovoid, 3-5 mm, shorter than perianth. Ecology: Found on moist soils in meadows from 4,500-9,500 ft (1372-2896 m); flowers July-September. Notes: Distinguished by the outer perianth segments equaling or slightly exceeding the inner ones, flat leaf blades with scarious margins, cream-colored or pale yellow anthers. Blade consistently shorter than stem, sometimes blades can be very reduced. Ethnobotany: Unknown Etymology: Juncus comes from the Latin jungere, to join or bind, while longistylis means long style. Synonyms: Juncus marginatus var. marginatus, Juncus marginatus var. setosus, Juncus setosus Editor: SBuckley, 2010