Rhynchospora glomerata

(Linnaeus) Vahl

Enum. Pl. 2: 234. 1805.

Basionym: Schoenus glomeratus Linnaeus Sp. Pl. 1: 44. 1753
Synonyms: Phaeocephalum glomeratum (Linnaeus) House Rhynchospora cymosa Muhlenberg ex Elliott Rhynchospora glomerata var. angusta Gale Rhynchospora glomerata var. paniculata (A. Gray) Chapman Rhynchospora glomerata var. robustior Kunth Rhynchospora paniculata Triodon glomeratus
Treatment appears in FNA Volume 23. Treatment on page 211. Mentioned on page 202, 210, 213.
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Plants perennial, cespitose, 80–150 cm; rhizomes absent. Culms excurvednodding, leafy, triangular, slender; principal leaves overtopped by culm; blades flat, 2.5–5 mm wide, apex attenuate, trigonous. Inflorescences terminal and axillary, spikelet clusters mostly 2–6, compact, turbinate to hemispheric, 1.5–2 cm wide; peduncles progressively shorter distally on culm; bracteal leaves mostly exceeding subtended groups. Spikelets crowded, deep redbrown, lanceellipsoid, 4.5–6.5 mm; fertile scales ovatelanceolate, 3.5–4(–4.5) mm, apex acute, midrib mostly shortexcurrent. Flowers: perianth bristles 6, overtopping tubercle, antrorsely barbellate. Fruits (1–)2(–3) per spikelet, 3–4 mm; body dark redbrown with pale center, stipitate, lenticular, obovoid, or orbicular, 1.5–2 × 1.2–1.4 mm, base narrowed, margins pale, wirelike; surfaces slick; tubercle triangular-subulate, 1.3–1.5(–1.8) mm.

Phenology: Fruiting summer–fall.
Habitat: Moist to wet meadows, swales, fens, flatwoods, and bogs, 0–500 m


V23 362-distribution-map.jpg

Ala., Ark., Del., Fla., Ga., Ill., Ky., La., Md., Miss., N.J., N.C., Okla., S.C., Tenn., Tex., Va., W.Va.


Rhynchospora glomerata is often associated with R. capitellata and is distinguishable by its taller, slightly stouter habit; longer, slightly paler spikelets; and longer and broader fruit body. It is a common lowland weed in the southern Piedmont, Atlantic coastal plain, and Gulf coastal plain, where it is often more associated with R. inexpansa.

Selected References


Lower Taxa

... more about "Rhynchospora glomerata"
Robert Kral +
(Linnaeus) Vahl +
Schoenus glomeratus +
Ala. +, Ark. +, Del. +, Fla. +, Ga. +, Ill. +, Ky. +, La. +, Md. +, Miss. +, N.J. +, N.C. +, Okla. +, S.C. +, Tenn. +, Tex. +, Va. +  and W.Va. +
Moist to wet meadows, swales, fens, flatwoods, and bogs, 0–500 m +
Fruiting summer–fall. +
Illustrated +  and Endemic +
Phaeocephalum glomeratum +, Rhynchospora cymosa +, Rhynchospora glomerata var. angusta +, Rhynchospora glomerata var. paniculata +, Rhynchospora glomerata var. robustior +, Rhynchospora paniculata +  and Triodon glomeratus +
Rhynchospora glomerata +
Rhynchospora +
species +