Juncus capitatus |
Juncus dichotomus |
|
---|---|---|
capitate rush, dwarf rush, leafy-bract dwarf rush |
dichotomous rush, fork rush |
|
Habit | Herbs, annual, cespitose, 0.3–1 dm. | Herbs, perennial, to 10 dm. |
Rhizomes | densely branched to short- creeping. |
|
Culms | to 20. |
|
Cataphylls | 1–3. |
|
Leaves | basal; auricles absent; blade 0.5–2.5 cm × 0.5 mm. |
basal, (1-)2-3; auricles 0.2-0.5(-0.6) mm, scarious to leathery; blade nearly terete, channeled or flat, 10-25(-40) cm × (0.5-)0.7-1(-1.2) mm, margins entire. |
Inflorescences | glomerules 1–2, each with 2–10(–14) flowers; bracts subtending inflorescence 1(–2), foliose, clearly surpassing inflorescence. |
terminal, (5–)10–85(–100)-flowered, congested to somewhat loose, (1-)2.5-10(-13) cm; primary bract usually exceeding inflorescence. |
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. |
bracteoles 2; tepals green, lanceolate, (3-)3.3-4.5(-5.5) mm; outer and inner series nearly equal; stamens 6, filaments 0.6–1.2 mm, anthers 0.4-0.8(-1) mm; style 0.2 mm. |
Capsules | tan to reddish brown, 3-locular, globose to obovoid, 1.2–1.7 mm, shorter than tepals. |
tan to brown, 1-locular to pseudo-3-locular, ellipsoid to widely so, (2.5-)2.8-3.5(-4.5) × 1x 1.6-2.2 mm. |
Seeds | ellipsoid-ovoid, 0.3–0.4 mm. |
brownish to amber, ellipsoid to lunate, 0.3-0.4 mm, not tailed. |
2n | = 18. |
= ca. 80. |
Juncus capitatus |
Juncus dichotomus |
|
Phenology | Flowering and fruiting spring. | Flowering and fruiting late spring–summer. |
Habitat | Moist to wet areas, usually in sandy, often disturbed soil such as roadsides or along trails | Ditches, shores, clearings, and other typically open areas, usually in sandy, well-drained (but frequently wet) soil |
Elevation | below 1000 m (below 3300 ft) | |
Distribution |
CA; LA; OK; TX; native; Africa (north); Europe; Asia (Near East) [Introduced in North America]
|
AL; AR; CO; CT; DC; DE; FL; GA; KY; LA; MA; MD; MS; NC; NJ; NY; OH; PA; RI; SC; TN; VA; WV; Mexico; Central America; South America; Texas
|
Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Juncaceae > Juncus > subg. Graminifolii | Juncaceae > Juncus > subg. Poiophylli |
Sibling taxa | ||
Synonyms | J. dichotomus var. platyphyllus, J. tenuis var. dichotomus, J. tenuis var. platyphyllus, J. platyphyllus | |
Name authority | Weigel: Observ. Bot. 28. (1772) | Elliott |
Web links |