Difference between revisions of "Heteropogon"
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|distribution=N.Mex.;Tex.;Calif.;Puerto Rico;Virgin Islands;Ala.;N.C.;S.C.;Pacific Islands (Hawaii);Ga.;Ariz.;Fla. | |distribution=N.Mex.;Tex.;Calif.;Puerto Rico;Virgin Islands;Ala.;N.C.;S.C.;Pacific Islands (Hawaii);Ga.;Ariz.;Fla. | ||
| − | |discussion=<p>Heteropogon is a pantropical genus of eight to ten species. Two species grow in the Flora region; probably both are introduced. Many grow well on poor soils.</p> | + | |discussion=<p><i>Heteropogon</i> is a pantropical genus of eight to ten species. Two species grow in the Flora region; probably both are introduced. Many grow well on poor soils.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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|publication year= | |publication year= | ||
|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/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V25/V25_1629.xml |
|subfamily=Poaceae subfam. Panicoideae | |subfamily=Poaceae subfam. Panicoideae | ||
|tribe=Poaceae tribe Andropogoneae | |tribe=Poaceae tribe Andropogoneae | ||
Revision as of 16:32, 18 September 2019
Plants annual or perennial; cespitose. Culms 20-200 cm, simple or branched. Leaves sometimes aromatic and smelling of lemon oil or citronella; sheaths keeled, sometimes with a row of glandular depressions on the keel; ligules membranous, glabrous or ciliate. Inflorescences terminal and axillary; peduncles usually with 1 rame, sometimes with several in a digitate cluster; rames with 3-10 homogamous, unawned, sessile-pedicellate spikelet pairs on the lower 1/4 - 2/3 and heterogamous, awned, sessile-pedicellate spikelet pairs distally, axes slender, without a translucent median groove; disarticulation in the rames, beneath the sessile spikelets of the heterogamous spikelet pairs, sometimes also below their pedicellate spikelets. Homogamous spikelet units sterile or staminate; calluses poorly developed; glumes membranous, many-veined, keels winged above. Heterogamous spikelet units: sessile spikelets bisexual, terete; calluses 1.5-3 mm, sharp, antrorsely strigose, hairs golden brown; glumes coriaceous, pubescent, concealing the florets; lower glumes enclosing the upper glumes, obscurely 5-9-veined; upper glumes sulcate, 3-veined; lower florets sterile, reduced to a hyaline lemma; upper florets bisexual, lemmas with conspicuous, geniculate awns; awns 5-15 cm, with hairs. Caryopses lanceolate, sulcate on 1 side. Pedicels short, free of the rame axes, not grooved; pedicellate spikelets sterile or staminate, larger than the sessile spikelets; calluses long, glabrous, functioning as pedicels; glumes membranous, many-veined, keels winged above, x = 10, 11.
Distribution
N.Mex., Tex., Calif., Puerto Rico, Virgin Islands, Ala., N.C., S.C., Pacific Islands (Hawaii), Ga., Ariz., Fla.
Discussion
Heteropogon is a pantropical genus of eight to ten species. Two species grow in the Flora region; probably both are introduced. Many grow well on poor soils.
Selected References
None.
Lower Taxa
Key
| 1 | Glumes of the pedicellate spikelets of the heterogamous spikelet units without glandular pits; plants perennial | Heteropogon contortus |
| 1 | Glumes of the pedicellate spikelets of the heterogamous spikelet units with a row of glandular pits along the midvein; plants annual | Heteropogon melanocarpus |