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Andropogon
Family: Poaceae
Andropogon image
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Christopher S. Campbell. Flora of North America
Plants perennial; usually cespitose, sometimes rhizomatous. Culms 20-310 cm, erect, much-branched distally. Leaves not aromatic; ligules membranous, sometimes ciliate; blades linear, flat, folded, or convolute. Inflorescences terminal and axillary or a false panicle; inflorescence units 1-600+ per culm; peduncles initially concealed by the subtending leaf sheaths, sometimes exserted beyond the sheaths at maturity, with (1)2-5(13) rames; rames not reflexed at maturity, axes slender, terete to flattened, not longitudinally grooved, usually conspicuously pubescent, with spikelets in heterogamous sessile-pedicellate pairs (the terminal spikelets sometimes in triplets of 1 sessile and 2 pedicellate spikelets), apices of the internodes neither cupulate nor fimbriate; disarticulation in the rames, below the sessile spikelets. Sessile spikelets bisexual, awned, with short, blunt calluses; lower glumes 2-keeled, flat or concave, usually not veined between the keels, sometimes 2-9-veined; anthers 1, 3(2). Pedicels usually longer than 3 mm, similar to the rame internodes in shape, length, and pubescence color, not fused to the rame axes. Pedicellate spikelets usually vestigial or absent, sometimes well-developed and staminate. x = 10. Name from the Greek andro, man, and pogon, beard, referring to the pubescent pedicels of the staminate spikelets.
Vascular plants of NE US and adjacent Canada
Spikelets of 2 kinds, in pairs (or trios) at joints of the rachis, one sessile and perfect, the other(s) pediceled and either staminate, neuter, abortive, or completely suppressed; glumes of the fertile spikelet equal or subequal, coriaceous, flat to concave on the back, lacking a midvein; fertile spikelet with 2 narrow, hyaline lemmas shorter than the glumes, the lower one empty and awnless, the upper one fertile and usually with an evident terminal awn; palea reduced and hyaline, or wanting; perennial, usually tufted, often glaucous, with elongate lvs; spikelets in racemes or spikes, these solitary, paired, digitate, or panicled, in our spp. mostly long-villous, the common peduncle usually subtended and often partly enclosed by a spathe-like lf. 100, widespread, mostly in warm reg.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.
Species within inventory project: SERNEC State Inventories
Andropogon arctatus
Image of Andropogon arctatus
Andropogon brachystachyus
Image of Andropogon brachystachyus
Andropogon capillipes
Image of Andropogon capillipes
Andropogon cretaceous
Image of Andropogon cretaceous
Andropogon floridanus
Image of Andropogon floridanus
Andropogon gerardi
Image of Andropogon gerardi
Andropogon glomeratus
Image of Andropogon glomeratus
Andropogon gyrans
Image of Andropogon gyrans
Andropogon hallii
Image of Andropogon hallii
Andropogon longiberbis
Image of Andropogon longiberbis
Andropogon mohrii
Image of Andropogon mohrii
Andropogon perangustatus
Image of Andropogon perangustatus
Andropogon ternarius
Image of Andropogon ternarius
Andropogon tracyi
Image of Andropogon tracyi
Andropogon virginicus
Image of Andropogon virginicus
The National Science Foundation
This project made possible by National Science Foundation Award 1410069
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