Rhynchospora fascicularis |
Rhynchospora baldwinii |
|
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fascicled beaksedge |
Baldwin's beaksedge |
|
Habit | Plants perennial, cespitose, 100–150 cm; rhizomes absent. | Plants perennial, cespitose, 40–100 cm; rhizomes absent. |
Culms | erect to excurvedascending, narrowly linear to ± filiform, terete to obscurely trigonous, leafy, densely so toward base, stiff to rather lax. |
stiffly erect to ascending, linear, leafy toward base, sharply trigonous, angles scabrid. |
Leaves | overtopped by culm; blades linear, ascending, proximally flat, 1–4 mm wide, apex trigonous, subulate, tapering gradually. |
shorter than culm; basal leaves forming strong rosette, shortlinear, flat, 3–5 mm wide, distal more widely spaced, narrower, apex shortacuminate, trigonous. |
Inflorescences | spikelet clusters 1–3(–4), proximal mostly widely spaced, dense, broadly turbinate to hemispheric, to 2 cm broad; leafy bracts subulate, exceeding proximal spikelets, slightly or not exceeding most distal clusters. |
spikelet clusters 1(–2), if 2 then closely set; terminal cluster mostly dense, hemispheric; proximalmost leafy bract subulate, much exceeding clusters. |
Spikelets | redbrown, narrowly ovoid, (3–)3.5–5 mm, apex acute; fertile scales ovate, 3–3.5(–4) mm, apex acute, mostly with cusp or mucro 0.5–1 mm. |
dark redbrown, ovoid, (4–)5–6 mm, apex acute; fertile scales ovate, mostly 4–4.5 mm, apex excurvedcuspidate. |
Flowers | bristles 5–6, from rudimentary to reaching tubercle tip, or (rarely) beyond, antrorsely barbellate. |
bristles 12, reaching to or slightly beyond tubercle tip, antrorsely barbellate. |
Fruits | 1–3 per spikelet, (1.5–)2–2.2(–2.5) mm; body dark brown with pale center, lenticular, broadly ellipsoid to ± orbicular, (1.3–)1.5–1.7(–1.9) × 1–1.5 mm, margins pale, narrow or narrowly rounded, flowing to tubercle; surfaces dull, minutely longitudinally striate; tubercle compressed, triangular to triangularsubulate, 0.5–0.7(–0.9) mm. |
1–2 per spikelet, 3–3.5(–3.7) mm; body dark brown with paler center, dull, broadly ellipsoid-lenticular, 2–2.5 × 1.8–2 mm, smooth, margins flowing to tubercle; tubercle flat, concavely triangular, 0.7–1(–1.2) mm. |
Rhynchospora fascicularis |
Rhynchospora baldwinii |
|
Phenology | Fruiting late spring–fall or all year (south). | Fruiting spring–fall. |
Habitat | Sands and peats of interdunal swales, depressions in savannas, open flatwoods, and seep-bog edges | Sandy peats in low savannas, pine flatwoods, seeps, and bogs |
Elevation | 0–100 m (0–300 ft) | 0–100 m (0–300 ft) |
Distribution |
AL; FL; GA; LA; MS; NC; SC; TX; VA; Central America; Bermuda
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AL; FL; GA; LA; MS; NC; SC |
Discussion | In her revision, S. Gale (1944) treated var. distans as the more slender version of the species, one with a smaller inflorescence, more distinctly margined fruit body, and consistently elongate perianth bristles. All those character states appear to vary independently over the total range of the species. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 23, p. 239. | FNA vol. 23, p. 237. |
Parent taxa | Cyperaceae > Rhynchospora | Cyperaceae > Rhynchospora |
Sibling taxa | ||
Synonyms | Schoenus fascicularis, Dichromena distans, Phaeocephalum fasciculare, Phaeocephalum distans, R. distans, R. distans var. fascicularis, R. dommucensis, R. fascicularis var. distans, Schoenus distans | Phaeocephalum baldwinii |
Name authority | (Michaux) Vahl: Enum. Pl. 2: 234. (1805) | A. Gray: Ann. Lyceum Nat. Hist. New York 3: 210. (1835) |
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