Rhynchospora harveyi |
Rhynchospora macra |
|||||
---|---|---|---|---|---|---|
Harvey's beaksedge |
large beaksedge |
|||||
Habit | Plants perennial, cespitose, 70–110 cm; rhizomes absent. | Plants perennial, cespitose, 40–80 cm; rhizomes absent. | ||||
Culms | erect to excurved, leafy, obscurely trigonous, slender. |
erect, trigonous, multiribbed, rather stiff. |
||||
Leaves | spreading to ascending, shorter than culm, crowded toward culm base; blades linear, proximally flat, 1–3 mm wide, gradually involute, apically trigonous, subulate. |
|||||
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 1–3, turbinate to hemispheric, 1.5–3 cm wide; subtending leafy bracts mostly exceeded by distal compound. |
||||
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. |
pale brown to nearly white, fusiform, 4–5(–7) mm, apex narrowly acute; fertile scales elliptic, 3.5–4 mm, apex narrowly acute, midrib excurrent as mucro. |
||||
Flowers | perianth bristles mostly 6, rarely reaching fruit midbody, antrorsely barbellate. |
perianth bristles (15–)18–20, reaching tubercle tip, retrorsely barbellate. |
||||
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 per spikelet, 2.5–3.2 mm; body brown with pale center, obovoid distal to short stipe, lenticular, 1.7–2.2 × 0.8–1.5, margins narrow, wirelike, flowing into tubercle edges; tubercle flat, narrowly triangular-subulate, 0.8–1 mm. |
||||
Principal | leaves overtopped by culm; blades narrowly linear, proximally flat, (1.5–)2–3.5 mm wide, apex tapering, trigonous. |
|||||
Rhynchospora harveyi |
Rhynchospora macra |
|||||
Phenology | Fruiting late summer–fall. | |||||
Habitat | Sands and sandy peats of savanna bogs and seeps, pinelands | |||||
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; FL; GA; LA; MS; NC; SC; TX; Central America (Nicaragua) |
||||
Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|||||
Key |
|
|||||
Source | FNA vol. 23, p. 231. | FNA vol. 23, p. 214. | ||||
Parent taxa | Cyperaceae > Rhynchospora | Cyperaceae > Rhynchospora | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | R. alba var. macra, Phaeocephalum album var. macrum, Triodon albus var. macer | |||||
Name authority | W. Boott: Bot. Gaz. 9: 85. (1884) | (C. B. Clarke ex Britton) Small: Man. S.E. Fl., 180. (1933) | ||||
Web links |