Juncus tenuis |
Juncus luciensis |
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path rush, poverty or slender rush, poverty rush, slender rush |
Santa Lucia dwarf rush, Santa Lucia rush |
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Habit | Herbs, perennial, tufted, 1.5–5 dm. | Herbs, annual, cespitose, 0.07–0.6 dm. |
Rhizomes | densely branching. |
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Culms | few–20. |
to 160. |
Leaves | basal, (1–)2–3; auricles 2–5 mm, apex acute, membranous; blade flat, 3–12 cm × 0.5–1 mm, margins entire. |
to 1.5 cm × 0.1–0.3 mm. |
Inflorescences | 5–40-flowered, borne congested or branch internodes ca. as long as tepals, ssomewhat loose, 1–5 cm; primary bract usually longer than inflorescence. |
1(–2) flowers; bracts subtending inflorescence 2, round to acutely ovate, inconspicuous, 0.4–1.6 mm, membranous. |
Flowers | bracteoles 2; tepals greenish, lanceolate, 3.3–4.4 mm; outer and inner series nearly equal; stamens 6, filaments 0.5–0.9 mm, anthers 0.1–0.2 mm; style 0.1–0.2 mm. |
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 | tan or light brown, 1-locular to pseudo-3-locular, ellipsoid, (3.3–)3.8–4.7 × (1.1–)1.3–1.7 mm, nearly equal to tepals. |
pale yellow-green to reddish tinged until seeds ripen, 3-locular, ovoid to ellipsoid, 1.3–2.9 × 0.9–1.6 mm. |
Seeds | tan, ellipsoid to lunate, (0.52–)5.5–0.65(–0.7) mm, not tailed. |
globose-ovoid, 0.3–0.4 mm. |
n | = 16. |
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2n | = 80. |
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Juncus tenuis |
Juncus luciensis |
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Phenology | Flowering spring–early summer. | Flowering and fruiting spring-- to early summer. |
Habitat | Exposed or shaded sites in soils ranging from sandy to clayey under moist or drier conditions, oftentimes these sites naturally or otherwise disturbed (e.g., game or human trails) | Wet sandy soil of seepage areas on sandstone, depressions in meadows, vernal pools, and streamsides |
Elevation | 300–1900 m (1000–6200 ft) | |
Distribution |
AK; AL; AR; AZ; CA; CO; CT; DC; DE; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NS; ON; PE; QC; SK [Introduced worldwide]
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CA |
Discussion | Juncus tenuis occurs throughout North America. It is particularly abundant in northeastern United States and eastern Canada, although infrequent in the south and west. Through the use of isozyme electrophoresis, hybridization can be demonstrated between various members of the Juncus tenuis complex, including Juncus tenuis, J. anthelatus, J. interior, J. secundus, and J. dichotomus (R. E. Brooks, unpubl.). Juncus ××oronensis is thought to be a hybrid between J. tenuis and J. vaseyi in the northeast. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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. Poiophylli | Juncaceae > Juncus > subg. Graminifolii |
Sibling taxa | ||
Synonyms | J. bicornis, J. bicornis var. williamsii, J. macer, J. macer, J. macer var. williamsii, J. tenuis var. bicornis, J. tenuis var. multicornis, J. tenuis var. williamsii | |
Name authority | Willdenow: Sp. Pl. 2(1): 214. (1799) | Ertter: Memoirs of the New York Botanical Garden 39: 58, figs. 13c–e, 14. (1986) |
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