Juncus brachycephalus |
Juncus inflexus |
|
---|---|---|
small-head rush |
blue rush, European blue rush, European Meadow rush |
|
Habit | Herbs, perennial, cespitose, 2–7 dm. | Herbs, perennial, cespitose, stooling, 4–10 (–12) dm. |
Rhizomes | 3–5 mm diam. |
|
Culms | erect, 1–4 mm diam., smooth. |
terete, 1.5–3 mm diam. |
Cataphylls | 1–2, straw-colored to pink, apex acute. |
several. |
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. |
blade absent. |
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. |
many flowered, open, 2–7 cm; primary bract terete, 10–25 cm. |
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. |
pedicellate; bracteoles ovate; tepals straw-colored to reddish brown, lanceolate, 2.7–3.5 mm, margins scarious; inner series loosely subtending capsule at maturity, shorter; stamens 6, filaments 0.8–1.5 mm, anthers 0.8–1 mm; style 0.3 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. |
reddish brown to chestnut brown, 3-locular, 3-gonous-ovoid to widely ellipsoid, 3–4 mm, exceeding perianth. |
Seeds | ellipsoid to fusiform, 0.8–1.2 mm, tailed; body covered with whitish translucent veil. |
amber, obovoid, 0.3–0.5 mm, not tailed. |
2n | = 80. |
= 20, 38, 40. |
Juncus brachycephalus |
Juncus inflexus |
|
Phenology | Fruiting summer–early fall. | Flowering and fruiting summer. |
Habitat | Calcareous marshes, wet meadows, and wetland shores | Wet soils along streams, ditches, and on wet, sandy and peaty hillsides |
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;
|
MI; NY; PA; VA; ON; Europe; Asia; Africa [Introduced in North America] |
Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Juncaceae > Juncus > subg. Septati | Juncaceae > Juncus > subg. Genuini |
Sibling taxa | ||
Synonyms | J. canadensis var. brachycephalus | J. glaucus |
Name authority | (Engelmann) Buchenau: Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie 12: 268. (1890) | Linnaeus: Sp. Pl. 1: 326. (1753) |
Web links |