Rhynchospora tracyi |
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Tracy's beaksedge |
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Habit | Plants perennial, clonal, to 120 cm; rhizomes scaly, slender, less than 2 mm thick. |
Culms | erect, leafybased, wandlike, nearly terete, multiribbed. |
Leaves | ascending or erect, longest nearly equaling culm; principal blades linear, involutecylindric, to 3 mm wide, apex tapering, subulate. |
Inflorescences | terminal, heads 1–4, dense, macelike, 1–1.5 mm thick; involucral bracts leafy, proximalmost overtopping inflorescence. |
Spikelets | greenish, lanceovoid, 5–6 mm, apex acuminate; fertile scales boat-shaped, 5 mm, apex acute to shortacuminate, midrib slightly excurrent or not. |
Flowers | perianth bristles 6, exceeding fruit body, antrorsely barbellate. |
Fruits | 1 per spikelet, 6–8(–8.7) mm; body pale greenbrown, laterally compressed, obcordiform, 2.5–3(–4) mm, margins thick, rounded, not crimped, apex barely exserted, setulose, surfaces nearly plane, minutely cancellate (latticed); tubercle (style base) linear, angled, 4–6 mm, much narrower than fruit summit, setulose. |
Rhynchospora tracyi |
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Phenology | Fruiting late spring–fall. |
Habitat | Emergent in shallows of cypress domes, marshes and swales, ditches and ponds |
Elevation | 0–100 m (0–300 ft) |
Distribution |
AL; FL; GA; LA; MS; NC; SC; TX; West Indies; Central America (Belize)
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Discussion | Rhynchospora tracyi frequently forms clones extending for acres by means of its long slender rhizomes. Its wandlike, terete, supple culms, and round-capitate clusters of spikelets suggest a rush more than a sedge. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 23, p. 207. |
Parent taxa | Cyperaceae > Rhynchospora |
Sibling taxa | |
Synonyms | Ceratoschoenus capitatus, Phaeocephalum tracyi, Schoenus triceps |
Name authority | Britton: Trans. New York Acad. Sci. 11: 84. (1892) |
Web links |