Difference between revisions of "Rhynchospora chapmanii"
Amer. J. Sci. Arts, ser. 2, 7: 409. 1849.
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|name=Phaeocephalum chapmanii | |name=Phaeocephalum chapmanii | ||
|authority=(M. A. Curtis) House | |authority=(M. A. Curtis) House | ||
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|hierarchy=Cyperaceae;Rhynchospora;Rhynchospora chapmanii | |hierarchy=Cyperaceae;Rhynchospora;Rhynchospora chapmanii | ||
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name=Rhynchospora chapmanii | name=Rhynchospora chapmanii | ||
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|authority=M. A. Curtis | |authority=M. A. Curtis | ||
|rank=species | |rank=species | ||
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|publication year=1849 | |publication year=1849 | ||
|special status= | |special status= | ||
− | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V23/V23_417.xml |
|genus=Rhynchospora | |genus=Rhynchospora | ||
|species=Rhynchospora chapmanii | |species=Rhynchospora chapmanii |
Revision as of 21:08, 16 December 2019
Plants perennial, densely cespitose, 30–50(–70) cm; rhizomes absent. Culms erect to excurved, filiform, leafy, stiff to lax. Leaves mostly slightly exceeded by culm; blades ± filiform, proximally flat to concave, distally tapering, to 1 mm wide, margins involute, apex trigonous, subulate. Inflorescences terminal; spikelet clusters 1(–2), dense, broadly turbinate to hemispheric; longer leafy bracts 1–2(–several), setaceous, overtopping inflorescence. Spikelets light brown, narrowly ovoid, 2–2.5(–3) mm, apex acute or acuminate; fertile scales 1.5–2(–2.5) mm, apex acute, midrib excurrent as cusp or awn 0.5–0.9 mm. Flowers: bristles absent, rarely reduced to nubbins, or rarely 1, then shorter than fruit body. Fruits 1 per spikelet, 1–1.8 mm; body with dark brown ends, broad pale midzone, lenticular, ± orbicular, 1–1.2 × 0.8–1 mm, surfaces smooth; margins sharp, flowing to tubercle; tubercle lowtriangular, 0.2–0.3(–0.5) mm, sometimes apiculate.
Phenology: Fruiting summer–fall; 0–200 m; Ala.
Distribution
Fla., Ga., La., Miss., N.C., S.C.
Discussion
Rhynchospora chapmanii is a frequent invader of logged or otherwise disturbed pine savannas, often an aspect dominant. Its pale inflorescences are conspicuous masses in autumn.
Selected References
None.