Juncus capitatus |
Juncus scirpoides |
|
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capitate rush, dwarf rush, leafy-bract dwarf rush |
needlepod rush, scirpuslike rush |
|
Habit | Herbs, annual, cespitose, 0.3–1 dm. | Herbs, perennial, rhizomatous, tosometimes nearly cespitose, 0.8–7 dm. |
Rhizomes | usually tuberous, 2–4 mm diam. |
|
Culms | to 20. |
erect, terete, 1–3 mm diam., smooth. |
Cataphylls | 0–1. |
|
Leaves | basal; auricles absent; blade 0.5–2.5 cm × 0.5 mm. |
basal 1–2, cauline 2–3, green; auricles 1–2 mm, apex rounded, membranaceous; blade terete, 2–23 cm × 1–2 mm, distal cauline leaf blade 1.6–26 cm, equaling or longer than sheath. |
Inflorescences | glomerules 1–2, each with 2–10(–14) flowers; bracts subtending inflorescence 1(–2), foliose, clearly surpassing inflorescence. |
terminal panicles of 1–23(–32) heads, 2.5–9 cm, branches ascending to erect; primary bracts erect; heads 20–60-flowered, spheric or usually lobed, 6–11 mm diam. |
Flowers | tepals 6, tan to brownish, subulate, lanceolate-ovate, 3.5–4.5(–5) mm, 2 times length of inner tepals, margins scarious; inner series delicate, shorter, apex acute; stamens 3, filaments 1 mm, anthers 0.5 mm; style 0.4–0.7 mm. |
tepals green to straw-colored, lance-subulate, 2–3.5 mm, nearly equal, apex acuminate; stamens 3, anthers 1/3 filament length. |
Capsules | tan to reddish brown, 3-locular, globose to obovoid, 1.2–1.7 mm, shorter than tepals. |
exserted, straw-colored, 1-locular, lance-subulate, 3–4 mm, apex tapering, remaining attached at tip, valves not separating at dehiscence, fertile throughout or only proximal to middle. |
Seeds | ellipsoid-ovoid, 0.3–0.4 mm. |
oblong, 0.4 mm, not tailed; body clear yellow-brown. |
2n | = 18. |
|
Juncus capitatus |
Juncus scirpoides |
|
Phenology | Flowering and fruiting spring. | Fruiting early summer–fall. |
Habitat | Moist to wet areas, usually in sandy, often disturbed soil such as roadsides or along trails | Wet sandy soil, salt marshes, lake shores, ditches, meadows, wet woods |
Elevation | below 1000 m (below 3300 ft) | 0–1400 m (0–4600 ft) |
Distribution |
CA; LA; OK; TX; native; Africa (north); Europe; Asia (Near East) [Introduced in North America]
|
AL; AR; DC; DE; FL; GA; IL; IN; KS; KY; LA; MD; MI; MO; MS; NC; NE; NJ; NY; OK; PA; SC; TN; TX; WV; Va
|
Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Juncaceae > Juncus > subg. Graminifolii | Juncaceae > Juncus > subg. Septati |
Sibling taxa | ||
Synonyms | J. echinatus, J. scirpoides var. compositus, J. scirpoides var. genuinus, J. scirpoides var. macrostemon, J. scirpoides var. meridionalis | |
Name authority | Weigel: Observ. Bot. 28. (1772) | Lamarck: in J. Lamarck et al., Encycl. 3: 267. (1789) |
Web links |