Fimbristylis puberula |
Fimbristylis schoenoides |
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hairy fimbry |
ditch fimbry |
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Habit | Plants perennial, mostly loosely cespitose, to 100 cm, bases swollen; rhizomes short, knotty, or scaly, slender, contorted. | Plants annual, cespitose, 10–35(–40) cm, glabrous; rhizomes absent. | ||||
Culms | sometimes solitary, narrowly linear, distally angular, glabrous. |
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Leaves | ascending, from 1/3 as long to equally as long as culms, glabrous to pubescent; sheaths apically ciliate; ligule essentially absent or (in rhizomatous individuals) present, complete or incomplete; blades narrowly linear, 1–2 mm wide, mostly strongly involute, scabrid-ciliate. |
polystichous, mostly spreading to ascending; sheath margins entire; ligule present, complete; blades narrowly linear, to 1 mm wide, flat to shallowly involute, margins distantly scabrid, surface glabrous. |
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Inflorescences | anthelae simple or compound, compact or diffuse, mostly broad, ascending-branching; scapes slender, wandlike, 1 mm thick; lower leafy involucral bracts exceeded by or exceeding panicle. |
spikelets 1, terminal or 2–3 in simple anthela longer than broad, laterals subsessile; scapes narrowly linear, coarsely ribbed, distally compressed; involucral bracts usually 1 per spikelet, exceeding or exceeded by it. |
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Spikelets | variously red-brown, broadly ovoid to lance-cylindric, 5–10 mm; fertile scales broadly ovate, obtuse or obtuse-angled, 2.5–3.5 mm, abaxially glabrous or variously puberulent, midrib excurrent as mucro. |
yellowish, mostly turgidly ovoid, 5–8 mm; fertile scales broadly ovate, 2–3 mm, apex obtuse, entire, midrib excurrent or not. |
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Flowers | stamens 3; styles 2-fid, flat, fimbriate. |
stamens 3, styles 2-fid, flattened, fimbriate. |
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Achenes | yellowish to dark brown, lenticular-obovoid, 1 mm, with 11–20 vertical lines of horizontally rectangular or isodiametric, distinct or indistinct pits. |
near white to pale brown, lenticular-obovoid to obpyriform, 2 mm, appearing smooth under 10–20X magnification, under higher power finely longitudinally ribbed, with fine, isodiametric pits in vertical lines. |
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2n | = 20. |
= 10. |
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Fimbristylis puberula |
Fimbristylis schoenoides |
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Phenology | Fruiting summer–fall, all year in south. | |||||
Habitat | Moist sands or sandy peats of roadsides, ditches, flatwoods clearings, savanna, and particularly, disturbed low, open areas | |||||
Elevation | 1–100 m (0–300 ft) | |||||
Distribution |
AL; AR; AZ; DE; FL; GA; IL; IN; KS; KY; LA; MD; MI; MO; MS; NC; NE; NJ; NM; NY; OH; OK; SC; TN; TX; UT; VA; ON
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AL; FL; GA; LA; MS; tropical Asia; Africa [Introduced in North America]
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Fimbristylis schoenoides is an unusual Fimbristylis for us, with a smooth, “eleocharis-like” appearance. The plants are mostly low and spreading-culmed, glabrous annuals of Asian origin. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 23. | FNA vol. 23, p. 124. | ||||
Parent taxa | Cyperaceae > Fimbristylis | Cyperaceae > Fimbristylis | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Scirpus puberulus | Scirpus schoenoides, F. inconstans | ||||
Name authority | (Michaux) Vahl: Enum. Pl. 2: 289. (1805) | (Retzius) Vahl: Enum. Pl. 2: 286. (1805) | ||||
Web links |