Rhynchospora harveyi |
Rhynchospora torreyana |
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Harvey's beaksedge |
Torrey's beaksedge |
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Habit | Plants perennial, cespitose, 70–110 cm; rhizomes absent. | Plants perennial, cespitose, 50–100 cm; rhizomes absent. | ||||
Culms | erect to excurved, leafy, obscurely trigonous, slender. |
ascending-excurved, leafy, ± terete, slender. |
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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. |
ascending, overtopped by culm; blades narrowly linear, proximally flat, 2–3 mm wide, apex trigonous, tapering. |
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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–)2–3, widely spaced, open to dense, broadly to narrowly turbinate, branches ascending to slightly spreading, capillary; leafy bracts setaceous-tipped, overtopping all but distal 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. |
light red-brown, ovoid, 3.5–5 mm, apex acuminate; fertile scales ovate, 2.5–3.5 mm, apex acute, midrib excurrent as cusp or mucro. |
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Flowers | perianth bristles mostly 6, rarely reaching fruit midbody, antrorsely barbellate. |
perianth bristles 6, reaching at most 2/3 length of fruit body, antrorsely barbellate. |
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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. |
1–4(–5) per spikelet, 2 mm; body brown, strongly compressed, obovoid-ellipsoid, 1.4–1.6 × 1–1.2 mm, margins flowing to tubercle; surfaces finely transversely rugose, intervals with narrow vertical alveolae; tubercle flat, low-triangular, 0.2–0.3(–0.5) mm. |
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Rhynchospora harveyi |
Rhynchospora torreyana |
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Phenology | Fruiting summer–fall. | |||||
Habitat | Sands and peats of low meadows, savannas, flatwoods, pond shores, ditch banks | |||||
Elevation | 0–200 m (0–700 ft) | |||||
Distribution |
AL; AR; FL; GA; KS; LA; MO; MS; NC; OK; SC; TN; TX; VA; se United States; Midwestern |
AL; CT; DE; FL; GA; MA; MD; NC; NJ; NY; RI; SC; VA |
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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. 224. | ||||
Parent taxa | Cyperaceae > Rhynchospora | Cyperaceae > Rhynchospora | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Phaeocephalum torreyanum | |||||
Name authority | W. Boott: Bot. Gaz. 9: 85. (1884) | A. Gray: Ann. Lyceum Nat. Hist. New York 3: 197. (1835) | ||||
Web links |