Juncus uncialis |
Juncus dichotomus |
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inch high dwarf rush, inch-high rush, twelfth rush |
dichotomous rush, fork rush |
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Habit | Herbs, annual, cespitose, 0.8–3.5 cm. | Herbs, perennial, to 10 dm. |
Rhizomes | densely branched to short- creeping. |
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Culms | to 70, more than 0.2 mm diam.. |
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Cataphylls | 1–3. |
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Leaves | to 2.2 cm, 1/2–3/4 height of plant. |
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 | terminal solitary flowers; bracts subtending inflorescence 1, widely truncate, enwrapping culm, inconspicuous, 0.25–0.9 mm, membranous, apex widely truncate, completely sheathing culm.. |
terminal, (5–)10–85(–100)-flowered, congested to somewhat loose, (1-)2.5-10(-13) cm; primary bract usually exceeding inflorescence. |
Flowers | 3-merous, : tepals erect to recurved at maturity, greenish or tinged red, 2–4 × 0.6–0.9 mm; outer and inner series nearly equal, apex acutish; stamens usually 3, filaments 0.9–1.6 mm, anthers 0.3–0.4 mm, 1/3 length of filaments; style 0.1–0.3 mm, stigma 0.4–1.3 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 | reddish to maroon, 3-locular, ovoid to ellipsoid, 1.8–3.2 × 1–2.5 mm, nearly equal or shorter than the 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 | ovoid, 0.3–0.4 mm. |
brownish to amber, ellipsoid to lunate, 0.3-0.4 mm, not tailed. |
n | = 16. |
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2n | = ca. 80. |
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Juncus uncialis |
Juncus dichotomus |
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Phenology | Flowering and fruiting spring–early summer. | Flowering and fruiting late spring–summer. |
Habitat | Margins of vernal pools and ponds | Ditches, shores, clearings, and other typically open areas, usually in sandy, well-drained (but frequently wet) soil |
Elevation | 0–1700 m (0–5600 ft) | |
Distribution |
CA; NV; OR
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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
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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 | Greene: Pittonia 2: 105. (1890) | Elliott |
Web links |
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