Juncus polycephalus |
Juncus squarrosus |
|
---|---|---|
flatleaf rush, manyhead rush |
heath rush, mosquito rush, mosquito rush (vascan) |
|
Habit | Herbs, perennial, cespitose, 6–10 dm. | Herbs, perennial, cespitose to mat-forming, 2–5 dm. |
Rhizomes | short, nearly erect, branching. |
|
Culms | erect, 3–14 mm diam. |
1(–2). |
Cataphylls | absent. |
2–4. |
Leaves | basal 2–3(–6), cauline 1–4, brownish green; auricles absent; blade 8–70 cm × 4–8 mm. |
basal, 3–6; auricles 0.2–0.4 mm, membranous to scarious; blade arcuate, spreading, grayish green, channeled, 7–30 cm × 1–2 mm, nearly leathery, margins entire. |
Inflorescences | panicles of 16–82 heads, 10–30 cm; primary bract erect; heads 20–30-flowered, spheric, 8–12 mm diam. |
terminal, 7–40-flowered, somewhat loose, 3–10 × 1–2 cm; primary bract usually shorter than inflorescence. |
Flowers | tepals green to reddish, lance-subulate, 3–4 mm, nearly equal, apex acuminate; stamens 3, anthers 1/3–1/2 length of filaments. |
pedicels 0.5–2 mm; bracteoles 2; tepals brown to blackish, 4–5.5 mm; outer and inner series nearly equal, apex obtuse to nearly acute; stamens 6, filaments 0.5 mm, anthers 1.5–2 mm; style 0.2 mm. |
Capsules | exserted, straw-colored, 1-locular, narrowly ovoid, 4–5 mm, apex tapering to beak, remaining after dehiscence. |
brownish, 3-locular, ovoid to ellipsoid, 4–5 × 2.3–3 mm, nearly equal to perianth. |
Seeds | lance-ellipsoid, 0.5–0.6 mm, not tailed. |
brownish, ellipsoid, 0.6–0.9 mm, not tailed. |
2n | = 42. |
|
Juncus polycephalus |
Juncus squarrosus |
|
Phenology | Fruiting spring–fall. | Flowering and fruiting late spring–summer. |
Habitat | Wet or seasonally wet shores, depressions, occasionally in fairly deep water of streams, usually with a peaty or mucky substrate, occasionally sandy to gravelly | Moist, open sites and bogs, occasionally disturbed areas |
Elevation | 0–100 m (0–300 ft) | 20–200 m (100–700 ft) |
Distribution |
AL; FL; GA; LA; MD; MS; NC; SC; TX
|
WI; Greenland; native; Europe [Introduced in North America] |
Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Juncaceae > Juncus > subg. Ensifolii | Juncaceae > Juncus > subg. Poiophylli |
Sibling taxa | ||
Synonyms | J. echinatus, J. engelmannii | |
Name authority | Michaux: Flora Boreali-Americana 1: 192. 1803 (as polycephalos) | Linnaeus: Sp. Pl. 1: 327. (1753) |
Web links |