Rhynchospora harveyi |
Rhynchospora divergens |
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Harvey's beaksedge |
spreading beaksedge |
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Habit | Plants perennial, cespitose, 70–110 cm; rhizomes absent. | Plants perennial, densely cespitose, 10–60 cm; rhizomes absent. | ||||
Culms | erect to excurved, leafy, obscurely trigonous, slender. |
erect or spreadingarching, linearfiliform, terete, leafy toward base. |
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Leaves | spreading to ascending, shorter than culm, crowded toward culm base; blades linear, proximally flat, 1–3 mm wide, gradually involute, apically trigonous, subulate. |
overtopped by culm; blades ascending, filiform, 0.3–0.5 mm wide, margins deeply involute, then channeled, apex trigonous, setaceous. |
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Inflorescences | spikelet clusters 1–4, dense to open, mostly irregularly turbinate; peduncles ascending, branches spreading to erect, ultimate branches with many spikelets; leafy bracts setaceoustipped, usually exceeding all clusters, or at least all but the distal. |
spikelet clusters 1–2(–4), dense(–open), narrowly to broadly turbinate; branches capillary, variously elongate; leafy bracts setaceous, proximal exceeding clusters. |
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Spikelets | light redbrown or brown, broadly ellipsoid to lanceoloid, 3–4 mm, apex acute to acuminate; fertile scales ovate to obovate or suborbiculate, 2–3.5 mm apex acute to rounded or emarginate, midrib included or exserted as mucro. |
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. |
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Flowers | perianth bristles mostly 6, rarely reaching fruit midbody, antrorsely barbellate. |
perianth absent. |
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Fruits | mostly 1 per spikelet, 2–2.5 mm, body dark brown, obovoid to subglobose, tumid or lenticular, 1.5–1.7 mm, transversely finely rugose to nearly level, intervals with very small, pitlike alveoli. |
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. |
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Rhynchospora harveyi |
Rhynchospora divergens |
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Phenology | Fruiting summer–fall or all year (south). | |||||
Habitat | Moist sands, peats, silts or clays of low meadows, bogs, flatwoods, sometimes seeps over calcareous rock | |||||
Elevation | 0–300 m (0–1000 ft) | |||||
Distribution |
AL; AR; FL; GA; KS; LA; MO; MS; NC; OK; SC; TN; TX; VA; se United States; Midwestern |
AL; FL; GA; LA; MS; NC; SC; TX; Central America; West Indies (Bahamas, Cuba, Dominican Republic) |
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 23, p. 231. | FNA vol. 23, p. 220. | ||||
Parent taxa | Cyperaceae > Rhynchospora | Cyperaceae > Rhynchospora | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | W. Boott: Bot. Gaz. 9: 85. (1884) | Chapman ex M. A. Curtis: Amer. J. Sci. Arts, ser. 2, 7: 409. (1849) | ||||
Web links |