Rhynchospora harveyi |
Rhynchospora recognita |
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Harvey's beaksedge |
globe beaksedge |
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Habit | Plants perennial, cespitose, 70–110 cm; rhizomes absent. | Plants perennial, cespitose, 60–100(–120) cm; rhizomes absent. | ||||
Culms | erect to excurved, leafy, obscurely trigonous, slender. |
leafiest at base, trigonous, slender, somewhat stiff. |
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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. |
exceeded by culms; basal blades spreading, blunt, distal ascending, linear, proximally flat, 2–5 mm wide, apex trigonous, subulate, 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 3–5 or more, compact, proximalmost widely spaced, turbinate to hemispheric or lobed; peduncles ascending, branches ascending; leafy bracts setaceous at apex, exceeding compounds, setaceous bracts often exceeding ultimate clusters, imparting bristly aspect. |
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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. |
redbrown, ovoid to lanceoloid, (2.7–)3–4 mm, apex acuminate; fertile scales ovate, 2.5–3 mm, apex acute, shortacuminate, or notched, midrib usually excurrent as cusp or awn. |
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Flowers | perianth bristles mostly 6, rarely reaching fruit midbody, antrorsely barbellate. |
perianth bristles 6, not reaching further than fruit midbody. |
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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 per spikelet, (1.8–)2–2.3(–2.5) mm; body brown, tumidly lenticular, obovoid to suborbicular, 1.4–1.6(–1.8) × 1.2–1.5 mm; surfaces transversely sharply rugose, intervals of rows of vertical, variously rectangular alveolae; tubercle somewhat compressed, triangular to shortconic, 0.5–0.7 mm, shortsubulate, basal rim often present. |
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Rhynchospora harveyi |
Rhynchospora recognita |
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Phenology | Fruiting spring–summer(–early fall). | |||||
Habitat | Sands, silts, clays, and peats of low meadows, ditches, low clearings, savannas | |||||
Elevation | 0–400 m (0–1300 ft) | |||||
Distribution |
AL; AR; FL; GA; KS; LA; MO; MS; NC; OK; SC; TN; TX; VA; se United States; Midwestern |
AL; AR; CA; DC; DE; FL; GA; IL; IN; KS; KY; LA; MD; MI; MO; MS; NC; NJ; OK; PA; SC; TN; TX; VA; WV; Central America; West Indies
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Rhynchospora recognita has larger fruit and tubercles than is consistent with the varietal rank it has held under R. globularis. The two are often observed in the same locality, and in such cases, R. recognita is taller, stiffer, broader leaved, with spikelet clusters wider, denser, and bristlier, and with distinct orange tints in comparison with the darker, less dense, narrower, and less bristly spikelet clusters of plants of R. globularis. (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. 225. | ||||
Parent taxa | Cyperaceae > Rhynchospora | Cyperaceae > Rhynchospora | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | R. globularis var. recognita, Dichromena cymosa, Phaeocephalum cymosum | |||||
Name authority | W. Boott: Bot. Gaz. 9: 85. (1884) | (Gale) Kral: Novon 9: 205. (1999) | ||||
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