Juncus tenuis |
Juncus georgianus |
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path rush, poverty or slender rush, poverty rush, slender rush |
Georgia rush |
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Habit | Herbs, perennial, tufted, 1.5–5 dm. | Herbs, short-lived perennial, cespitose, to 4 dm. |
Rhizomes | densely branching. |
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Culms | few–20. |
3–40. |
Leaves | basal, (1–)2–3; auricles 2–5 mm, apex acute, membranous; blade flat, 3–12 cm × 0.5–1 mm, margins entire. |
basal, 2–3; auricles 0.2–0.3 mm, scarious to membranous; blade flat, 5–15 cm × 0.4–0.7 mm, margins entire. |
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. |
(3–)8–30(–45)-flowered, diffuse, 3–11 cm; primary bract rarely surpassing inflorescence. |
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. |
bracteoles 2; tepals greenish to tan, lanceolate, (3.3–)3.6–5.1(–5.7) mm; outer and inner series nearly equal, apex acuminate; stamens 6, filaments 0.2–0.4 mm, anthers (0.8–)1.2–1.5(–1.7) mm; style 0.6–0.8 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. |
tan, 3-locular, ellipsoid to narrowly so, 2.7–4 × 1.2–1.7 mm. |
Seeds | tan, ellipsoid to lunate, (0.52–)5.5–0.65(–0.7) mm, not tailed. |
tan, ellipsoid or widely so, 0.364–0.45 mm, not tailed. |
2n | = 80. |
= ca. 80. |
Juncus tenuis |
Juncus georgianus |
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Phenology | Flowering spring–early summer. | Flowering and fruiting spring. |
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) | Exposed sites with thin, usually sandy soil over surfacing granite (flatrocks), the soil in these areas may be moist in the spring from seepage or for a short period after rainfalls |
Elevation | 300–600 m (1000–2000 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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AL; GA; NC; SC |
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.) |
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Source | FNA vol. 22. | FNA vol. 22. |
Parent taxa | Juncaceae > Juncus > subg. Poiophylli | Juncaceae > Juncus > subg. Poiophylli |
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) | Coville: Bulletin of the Torrey Botanical Club 22:44. (1895) |
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