Juncus filiformis |
Juncus bryoides |
|
---|---|---|
thread rush |
moss rush, mosslike dwarf rush |
|
Habit | Herbs, perennial, 0.2–3.5 dm. | Herbs, annual, cespitose, 0.03–0.25 dm. |
Rhizomes | widely creeping, sparingly branched, 1.5–2 mm diam., nodes closely set. |
|
Culms | terete, 1 mm diam. |
to 150, 0.1–0.2 mm wide. |
Cataphylls | several. |
|
Leaves | blade absent. |
to 0.9 cm, 1/4–1 times height of plant. |
Inflorescences | 3–10(–12)-flowered, loosely congested, 1–2 cm; primary bract terete, nearly equaling to much longer than culm. |
terminal solitary flowers; bracts subtending inflorescence (1–)2, ovate, inconspicuous, 0.3–0.9 mm, membranous, apex acute. |
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. |
3-merous; : tepals (4–)6(–8), turning inward to enwrap shorter capsule at maturity, chestnut brown to black, lanceolate to oblong, 1.2–2.3(–2.8) × 0.4–0.6 mm; ; outer and inner series nearly equal, acute to acuminate; stamens 3, filaments 0.3–0.6 mm, anthers 0.15–0.25 mm; style 0.1 mm, stigma 0.2–0.3 mm. |
Capsules | tan, 3-locular, nearly globose, 2.5–3 × 1.8–2.1 mm, shorter than perianth. |
pale reddish, 3-locular, ovoid to ellipsoid, 1–1.9 mm × 0.5–1 mm. |
Seeds | amber, 0.5–0.6 mm, not tailed. |
ovoid to globose, 0.3–0.5 mm. |
2n | = 40, 70, 80, 84. |
= ca. 38. |
Juncus filiformis |
Juncus bryoides |
|
Phenology | Flowering and fruiting summer. | Flowering and fruiting spring–mid 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 | Usually fine, sandy soil of washes, swales in meadows, and seepage areas on rock outcrops |
Elevation | 0–3000 m (0–9800 ft) | 600–3600 m (2000–11800 ft) |
Distribution |
AK; CO; ID; MA; ME; MI; MN; MT; NE; NH; NJ; NY; OR; PA; UT; VT; WA; WI; WV; WY; AB; BC; MB; NB; NL; NS; NT; NU; ON; PE; QC; SK; YT; SPM; Greenland; Eurasia; Atlantic Islands (Iceland)
|
CA; CO; ID; NV; OR; UT; Mexico
|
Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Juncaceae > Juncus > subg. Genuini | Juncaceae > Juncus > subg. Graminifolii |
Sibling taxa | ||
Name authority | Linnaeus: Sp. Pl. 1: 326. (1753) | F. J. Hermann: Leaflets of Western Botany 5: 117. (1948) |
Web links |