Flora of North America species comparison

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Schoenus

blackhead sedge, bogrush
Habit Herbs, perennial, cespitose, rhizomatous.
Culms

distally branched, terete.
Leaves

basal;

ligules absent;

blades involute or subcylindric.
Inflorescences

terminal, sometimes pseudolateral, capitate [diffusely branched];

spikelets (1–)10–25, black or very dark purple;

involucral bracts 1–2, spreading or erect, leaflike.
Spikelets

scales 3–8, distichous, black or very dark purple, 2–3 proximal scales empty, distal scales each subtending flower.
Flowers

bisexual;

perianth bristles 0–6, shorter or longer than achene, smooth or scabrous;

stamens 3;

styles deciduous, linear, 3-fid.
Achenes

rounded-trigonous to subterete.

Schoenus
Distribution
from USDA
Worldwide in warm-temperate and tropical regions
[BONAP county map]
Discussion

Species ca. 80 (1 in the flora).

Schoenus is restricted mostly to Australasia; a few species occur in Africa, Eurasia, and the New World.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 23, p. 239. Author: Gordon C. Tucker.
Parent taxa Cyperaceae
Subordinate taxa
S. nigricans
Name authority Linnaeus: Sp. Pl. 1: 42. (1753): Gen. Pl. ed. 5, 26. (1754)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Apiaceae, Boraginaceae, and Polemoniaceae.)

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