Juncus brachycephalus |
Juncus secundus |
|
---|---|---|
small-head rush |
lopside rush |
|
Habit | Herbs, perennial, cespitose, 2–7 dm. | Herbs, short-lived perennial, cespitose, 1.5–7 dm. |
Culms | erect, 1–4 mm diam., smooth. |
1–30. |
Cataphylls | 1–2, straw-colored to pink, apex acute. |
|
Leaves | basal 1–3, cauline 1–2; auricles 0.6–1.5 mm, apex rounded, scarious; blade terete to compressed, 0.2–12 cm × 0.5–2 mm. |
basal, (1–)2–3; auricles 0.2–0.4(–0.6) mm, scarious; blade flat, 10–30 cm × 0.5–1 mm, margins entire. |
Inflorescences | panicles of 5–80 heads, 5–25 cm, branches ascending; primary bract erect; heads 2–6-flowered, ellipsoid to obovoid, 2–5 mm diam. |
5–15(–30)-flowered, usually somewhat loose, 1–5 cm; primary bract usually shorter than inflorescence. |
Flowers | tepals green to light brown, lanceolate; outer tepals 1.8–2.5 mm, apex obtuse to nearly acute; inner tepals 2–2.8 mm, apex obtuse to nearly acute; stamens 3 or 6, anthers 1/2 filament length. |
chiefly along inner side of branches; bracteoles 2; tepals greenish, lanceolate, 3.3–4.4 mm; outer and inner series equal, apex acuminate; stamens 6, filaments 0.5–0.9 mm, anthers 0.4–0.8 mm; style 0.1–0.2 mm. |
Capsules | exserted, chestnut to dark brown, imperfectly 3-locular, obconic, 2.4–3.8 mm, apex acute proximal to beak, valves separating at dehiscence. |
tan or light brown, 3-locular, ellipsoid, (3.3–)3.8–4.7 mm, nearly equal to tepals. |
Seeds | ellipsoid to fusiform, 0.8–1.2 mm, tailed; body covered with whitish translucent veil. |
tan, ellipsoid to lunate, 0.5–0.6(–0.7) mm, not tailed. |
2n | = 80. |
= ca. 80. |
Juncus brachycephalus |
Juncus secundus |
|
Phenology | Fruiting summer–early fall. | Flowering and fruiting spring. |
Habitat | Calcareous marshes, wet meadows, and wetland shores | Exposed sites, usually with well-drained sandy soil, often associated with shallow bedrock |
Elevation | 100–200 m (300–700 ft) | |
Distribution |
AL; CO; CT; GA; IL; IN; MA; ME; MI; MN; NC; ND; NH; NJ; NY; OH; OK; PA; TN; VA; VT; WI; WV; NB; NS; ON; QC;
|
AL; AR; CT; DE; GA; IL; IN; KY; LA; MA; MD; ME; MO; NC; NH; NJ; NY; OH; OK; PA; RI; TN; VA; VT; WV; NS; ON
|
Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Juncaceae > Juncus > subg. Septati | Juncaceae > Juncus > subg. Poiophylli |
Sibling taxa | ||
Synonyms | J. canadensis var. brachycephalus | |
Name authority | (Engelmann) Buchenau: Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie 12: 268. (1890) | P.. Beauvois ex Poiret: in J. Lamarck et al., Encyclopedie Methodique. Botanique... Supplement 3: 160. (1813) |
Web links |