Rhynchospora fascicularis (Michx.) Vahl

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.

Plants perennial, cespitose, 100–150 cm; rhizomes absent. Culms erect to excurved ascending, 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 red brown, 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 triangular subulate, 0.5–0.7(–0.9) mm.

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

Fruiting late spring–fall or all year (south).

Sands and peats of interdunal swales, depressions in savannas, open flatwoods, and seep-bog edges; 0–100m.

Schoenus fascicularis Michaux, Fl. Bor.-Amer. 1: 37. 1803; Dichromena distans (Michaux) J. F. Macbride; Phaeocephalum fasciculare (Michaux) House; P. distans (Michaux) House; Rhynchospora distans (Michaux) Vahl; R. distans var. fascicularis (Michaux) Kükenthal; R. dommucensis A. H. Moore; R. fascicularis var. distans (Michaux) Chapman; Schoenus distans Michaux

Rhynchospora fascicularis là loài thực vật có hoa trong họ Cói. Loài này được (Michx.) Vahl miêu tả khoa học đầu tiên năm 1805.