Rhynchospora pusilla |
Rhynchospora divergens |
|
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|
spreading beaksedge |
|
Habit | Plants perennial, densely cespitose, 15–50(–60) cm; rhizomes absent. | Plants perennial, densely cespitose, 10–60 cm; rhizomes absent. |
Culms | erect or arching, leafy toward base, filiform, terete, wiry. |
erect or spreadingarching, linearfiliform, terete, leafy toward base. |
Leaves | overtopped by culm; blades linear to filiform, channeled, 0.3–0.5 mm wide, margins deeply involute, apex setaceous. |
overtopped by culm; blades ascending, filiform, 0.3–0.5 mm wide, margins deeply involute, then channeled, apex trigonous, setaceous. |
Inflorescences | spikelet clusters 1–2(–3), dense to open, narrowly to broadly turbinate; branches capillary, variously elongate; leafy bracts setaceous, equaling or exceeding clusters. |
spikelet clusters 1–2(–4), dense(–open), narrowly to broadly turbinate; branches capillary, variously elongate; leafy bracts setaceous, proximal exceeding clusters. |
Spikelets | variously brown, ellipsoid, 2–3 mm, apex sharply acute; fertile scales ovate to nearly orbiculate, rounded, 1.2–1.8 mm, apiculate, convexcupulate, midrib slender, mostly included. |
brownish, lanceellipsoid to fusiform, 2–2.5(–3) mm, apex acute; fertile scales broadly elliptic, 1.5 mm, apex narrowly rounded to broadly acute, apiculate, convexcupulate, midrib narrow, shortexcurrent or included. |
Flowers | perianth absent. |
perianth absent. |
Fruits | 2–3 per spikelet, 0.7–0.9(–1) mm; body pale, obovoid-lenticular, (0.5–)0.6–0.9 × 0.4–0.5 mm, margin wirelike; surfaces transversely rugulose; tubercle buttonlike, depressed triangular, 0.05–0.1 mm, base lunate atop rounded fruit body. |
1–3 or more per spikelet, (0.6–)0.7–0.9(–1) mm; body pale, glassy, obovoidlenticular, 0.6–0.7 × 0.4–0.5 mm, margins narrow, wirelike; surfaces finely striate, very finely reticulate; tubercle button depressedtriangular or patelliform, 0.1–0.15 mm, apiculate. |
Rhynchospora pusilla |
Rhynchospora divergens |
|
Phenology | Fruiting summer–fall. | Fruiting summer–fall or all year (south). |
Habitat | Moist sands, peats and silts of low meadows, savannas, bogs, seeps, pond shores | Moist sands, peats, silts or clays of low meadows, bogs, flatwoods, sometimes seeps over calcareous rock |
Elevation | 0–300 m (0–1000 ft) | 0–300 m (0–1000 ft) |
Distribution |
AL; FL; GA; LA; MS; NC; SC; TX; Mexico; Central America; West Indies |
AL; FL; GA; LA; MS; NC; SC; TX; Central America; West Indies (Bahamas, Cuba, Dominican Republic) |
Source | FNA vol. 23, p. 220. | FNA vol. 23, p. 220. |
Parent taxa | Cyperaceae > Rhynchospora | Cyperaceae > Rhynchospora |
Sibling taxa | ||
Synonyms | Phaeocephalum pusillum, R. intermixta | |
Name authority | Chapman ex M. A. Curtis: Amer. J. Sci. Arts, ser. 2, 7: 409. (1849) | Chapman ex M. A. Curtis: Amer. J. Sci. Arts, ser. 2, 7: 409. (1849) |
Web links |