Difference between revisions of "Schoenus"

Linnaeus

Sp. Pl. 1: 42. 1753.

,

Gen. Pl. ed. 5, 26. 1754.

Common names: Blackhead sedge
Etymology: Greek schoinos, rushlike plant
Treatment appears in FNA Volume 23. Treatment on page 239. Mentioned on page 6, 7.
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|family=Cyperaceae
 
|family=Cyperaceae
 
|illustrator=Yevonn Wilson-Ramsey
 
|illustrator=Yevonn Wilson-Ramsey
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|illustration copyright=Flora of North America Association
 
|distribution=Worldwide in warm-temperate and tropical regions.
 
|distribution=Worldwide in warm-temperate and tropical regions.
 
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|publication year=1753;1754
 
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|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V23/V23_428.xml
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|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V23/V23_428.xml
 
|genus=Schoenus
 
|genus=Schoenus
 
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Revision as of 20:08, 16 December 2019

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.

Distribution

Worldwide in warm-temperate and tropical regions.

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.

Lower Taxa