Juncus filiformis

Linnaeus

Sp. Pl. 1: 326. 1753. 1753

Common names: Thread rush
Illustrated
Treatment appears in FNA Volume 22.

Herbs, perennial, 0.2–3.5 dm. Rhizomes widely creeping, sparingly branched, 1.5–2 mm diam., nodes closely set. Culms terete, 1 mm diam. Cataphylls several. Leaves: blade absent. Inflorescences 3–10(–12)-flowered, loosely congested, 1–2 cm; primary bract terete, nearly equaling to much longer than culm. Flowers pedicellate; bracteoles broadly ovate, tepals light brown or green, lanceolate, 2.5–4.2 mm; inner series loosely subtending capsule at maturity, slightly shorter, margins scarious; stamens 6, filaments 0.5–0.9 mm, anthers 0.5–0.7 mm; style 0.2 mm. Capsules tan, 3-locular, nearly globose, 2.5–3 × 1.8–2.1 mm, shorter than perianth. Seeds amber, 0.5–0.6 mm, not tailed. 2n = 40, 70, 80, 84.


Phenology: Flowering and fruiting summer.
Habitat: Usually sandy, moist or wet soil along stream banks, pools, lakes or in meadow depressions, rarely in bogs, frequently hidden by larger vegetation
Elevation: 0–3000 m

Distribution

V22 470-distribution-map.jpg

Greenland, St. Pierre and Miquelon, Alta., B.C., Man., Nfld. and Labr., N.B., N.S., N.W.T., Nunavut, Ont., P.E.I., Que., Sask., Yukon, Alaska, Colo., Idaho, Maine, Mass., Mich., Minn., Mont., Nebr., N.H., N.J., N.Y., Oreg., Pa., Utah, Vt., Wash., W.Va., Wis., Wyo., Eurasia, Atlantic Islands (Iceland).

Discussion

Selected References

None.

Lower Taxa

None.

... more about "Juncus filiformis"
Ralph E. Brooks* +  and Steven E. Clemants* +
Linnaeus +
Thread rush +
Greenland +, St. Pierre and Miquelon +, Alta. +, B.C. +, Man. +, Nfld. and Labr. +, N.B. +, N.S. +, N.W.T. +, Nunavut +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Alaska +, Colo. +, Idaho +, Maine +, Mass. +, Mich. +, Minn. +, Mont. +, Nebr. +, N.H. +, N.J. +, N.Y. +, Oreg. +, Pa. +, Utah +, Vt. +, Wash. +, W.Va. +, Wis. +, Wyo. +, Eurasia +  and Atlantic Islands (Iceland). +
0–3000 m +
Usually sandy, moist or wet soil along stream banks, pools, lakes or in meadow depressions, rarely in bogs, frequently hidden by larger vegetation +
Flowering and fruiting summer. +
Illustrated +
Juncus sect. Genuini +, Juncus sect. Juncotypus +  and Juncus subg. Juncotypus +
Juncus filiformis +
Juncus subg. Genuini +
species +