Rhynchospora fascicularis

(Michaux) Vahl

Enum. Pl. 2: 234. 1805.

Basionym: Schoenus fascicularis Michaux Fl. Bor.-Amer. 1: 37. 1803
Synonyms: Dichromena distans (Michaux) J. F. Macbride Phaeocephalum fasciculare (Michaux) House Phaeocephalum distans (Michaux) House Rhynchospora distans (Michaux) Vahl Rhynchospora distans var. fascicularis (Michaux) Kükenthal Rhynchospora dommucensis Michaux Rhynchospora fascicularis var. distans (Michaux) Chapman Schoenus distans
Treatment appears in FNA Volume 23. Treatment on page 239. Mentioned on page 207, 236, 238.
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Plants perennial, cespitose, 100–150 cm; rhizomes absent. Culms erect to excurvedascending, narrowly linear to ± filiform, terete to obscurely trigonous, leafy, densely so toward base, stiff to rather lax. Leaves overtopped by culm; blades linear, ascending, proximally flat, 1–4 mm wide, apex trigonous, subulate, tapering gradually. 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. 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. Flowers: bristles 5–6, from rudimentary to reaching tubercle tip, or (rarely) beyond, 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.

Phenology: Fruiting late spring–fall or all year (south).
Habitat: Sands and peats of interdunal swales, depressions in savannas, open flatwoods, and seep-bog edges
Elevation: 0–100 m


V23 427-distribution-map.jpg

Ala., Fla., Ga., La., Miss., N.C., S.C., Tex., Va., Bermuda, Central America.


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.

Selected References


Lower Taxa

... more about "Rhynchospora fascicularis"
Robert Kral +
(Michaux) Vahl +
Schoenus fascicularis +
Ala. +, Fla. +, Ga. +, La. +, Miss. +, N.C. +, S.C. +, Tex. +, Va. +, Bermuda +  and Central America. +
0–100 m +
Sands and peats of interdunal swales, depressions in savannas, open flatwoods, and seep-bog edges +
Fruiting late spring–fall or all year (south). +
Illustrated +
Dichromena distans +, Phaeocephalum fasciculare +, Phaeocephalum distans +, Rhynchospora distans +, Rhynchospora distans var. fascicularis +, Rhynchospora dommucensis +, Rhynchospora fascicularis var. distans +  and Schoenus distans +
Rhynchospora fascicularis +
Rhynchospora +
species +