Juncus brachycephalus |
Juncus luciensis |
|
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small-head rush |
Santa Lucia dwarf rush, Santa Lucia rush |
|
Habit | Herbs, perennial, cespitose, 2–7 dm. | Herbs, annual, cespitose, 0.07–0.6 dm. |
Culms | erect, 1–4 mm diam., smooth. |
to 160. |
Cataphylls | 1–2, straw-colored to pink, apex acute. |
|
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. |
to 1.5 cm × 0.1–0.3 mm. |
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. |
1(–2) flowers; bracts subtending inflorescence 2, round to acutely ovate, inconspicuous, 0.4–1.6 mm, membranous. |
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. |
tepals pale yellow-green until seeds ripen, tip darker, 1.6–3(–4.2) mm; ; outer and inner series nearly equal or outer slightly longer; stamens 2–3, filaments 0.6–0.9 mm, anthers 0.3–0.5 mm; style 0.2–0.4 mm, stigma 0.6–1.1 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. |
pale yellow-green to reddish tinged until seeds ripen, 3-locular, ovoid to ellipsoid, 1.3–2.9 × 0.9–1.6 mm. |
Seeds | ellipsoid to fusiform, 0.8–1.2 mm, tailed; body covered with whitish translucent veil. |
globose-ovoid, 0.3–0.4 mm. |
n | = 16. |
|
2n | = 80. |
|
Juncus brachycephalus |
Juncus luciensis |
|
Phenology | Fruiting summer–early fall. | Flowering and fruiting spring-- to early summer. |
Habitat | Calcareous marshes, wet meadows, and wetland shores | Wet sandy soil of seepage areas on sandstone, depressions in meadows, vernal pools, and streamsides |
Elevation | 100–200 m (300–700 ft) | 300–1900 m (1000–6200 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;
|
CA |
Discussion | Juncus luciensis occurs in California in the Diamond and Santa Lucia mountains and the Transverse and Peninsular ranges. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Juncaceae > Juncus > subg. Septati | Juncaceae > Juncus > subg. Graminifolii |
Sibling taxa | ||
Synonyms | J. canadensis var. brachycephalus | |
Name authority | (Engelmann) Buchenau: Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie 12: 268. (1890) | Ertter: Memoirs of the New York Botanical Garden 39: 58, figs. 13c–e, 14. (1986) |
Web links |