Juncus filiformis |
Juncus georgianus |
|
---|---|---|
thread rush |
Georgia rush |
|
Habit | Herbs, perennial, 0.2–3.5 dm. | Herbs, short-lived perennial, cespitose, to 4 dm. |
Rhizomes | widely creeping, sparingly branched, 1.5–2 mm diam., nodes closely set. |
|
Culms | terete, 1 mm diam. |
3–40. |
Cataphylls | several. |
|
Leaves | blade absent. |
basal, 2–3; auricles 0.2–0.3 mm, scarious to membranous; blade flat, 5–15 cm × 0.4–0.7 mm, margins entire. |
Inflorescences | 3–10(–12)-flowered, loosely congested, 1–2 cm; primary bract terete, nearly equaling to much longer than culm. |
(3–)8–30(–45)-flowered, diffuse, 3–11 cm; primary bract rarely surpassing inflorescence. |
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. |
bracteoles 2; tepals greenish to tan, lanceolate, (3.3–)3.6–5.1(–5.7) mm; outer and inner series nearly equal, apex acuminate; stamens 6, filaments 0.2–0.4 mm, anthers (0.8–)1.2–1.5(–1.7) mm; style 0.6–0.8 mm. |
Capsules | tan, 3-locular, nearly globose, 2.5–3 × 1.8–2.1 mm, shorter than perianth. |
tan, 3-locular, ellipsoid to narrowly so, 2.7–4 × 1.2–1.7 mm. |
Seeds | amber, 0.5–0.6 mm, not tailed. |
tan, ellipsoid or widely so, 0.364–0.45 mm, not tailed. |
2n | = 40, 70, 80, 84. |
= ca. 80. |
Juncus filiformis |
Juncus georgianus |
|
Phenology | Flowering and fruiting summer. | Flowering and fruiting spring. |
Habitat | Usually sandy, moist or wet soil along stream banks, pools, lakes or in meadow depressions, rarely in bogs, frequently hidden by larger vegetation | Exposed sites with thin, usually sandy soil over surfacing granite (flatrocks), the soil in these areas may be moist in the spring from seepage or for a short period after rainfalls |
Elevation | 0–3000 m (0–9800 ft) | 300–600 m (1000–2000 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)
|
AL; GA; NC; SC |
Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Juncaceae > Juncus > subg. Genuini | Juncaceae > Juncus > subg. Poiophylli |
Sibling taxa | ||
Name authority | Linnaeus: Sp. Pl. 1: 326. (1753) | Coville: Bulletin of the Torrey Botanical Club 22:44. (1895) |
Web links |