Difference between revisions of "Dichanthelium ravenelii"
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|distribution=Md.;Okla.;Miss.;Tex.;La.;Mo.;Del.;Ala.;D.C;Tenn.;N.C.;S.C.;Va.;Ark.;Ill.;Ga.;Iowa;Ky.;Fla. | |distribution=Md.;Okla.;Miss.;Tex.;La.;Mo.;Del.;Ala.;D.C;Tenn.;N.C.;S.C.;Va.;Ark.;Ill.;Ga.;Iowa;Ky.;Fla. | ||
| − | |discussion=<p | + | |discussion=<p>Dichanthelium ravenelii grows in dry, sandy wood¬lands of the southeastern United States. The primary panicles develop from early May through June, and are at least partly open-pollinated. The secondary panicles, which are produced from July through September, are cleistogamous. Putative hybrids with other species are very rare.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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|basionyms= | |basionyms= | ||
|family=Poaceae | |family=Poaceae | ||
| + | |illustrator=Linda A. Vorobik and Hana Pazdírková | ||
|distribution=Md.;Okla.;Miss.;Tex.;La.;Mo.;Del.;Ala.;D.C;Tenn.;N.C.;S.C.;Va.;Ark.;Ill.;Ga.;Iowa;Ky.;Fla. | |distribution=Md.;Okla.;Miss.;Tex.;La.;Mo.;Del.;Ala.;D.C;Tenn.;N.C.;S.C.;Va.;Ark.;Ill.;Ga.;Iowa;Ky.;Fla. | ||
|reference=None | |reference=None | ||
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|publication year= | |publication year= | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/314eb390f968962f596ae85f506b4b3db8683b1b/coarse_grained_fna_xml/V25/V25_1154.xml |
|subfamily=Poaceae subfam. Panicoideae | |subfamily=Poaceae subfam. Panicoideae | ||
|tribe=Poaceae tribe Paniceae | |tribe=Poaceae tribe Paniceae | ||
Revision as of 17:14, 30 October 2019
Plants cespitose, with caudices. Basal rosettes well-differentiated; blades 3-8 cm, ovate to lanceolate. Culms 25-75 cm, 2-3 mm thick, erect, purplish; nodes densely bearded with spreading to retrorse hairs above a glabrous ring; internodes pilose or ascending hirsute, hairs papillose-based, also puberulent; fall phase with nearly erect culms, branching from the mid- and upper culm nodes; branches short, ascending, bushy, with several reduced, partly enclosed secondary panicles. Cauline leaves 4-6; sheaths not overlapping, papillose-hirsute and puberulent; collars densely pubescent; ligules 2-5 mm, of hairs; blades 8-17 cm long, 8-18 mm wide, lanceolate, stiff, thick, abaxial surfaces densely soft-pubescent, velvety, adaxial surfaces glabrous or sparsely pilose, with 9-11 major veins slightly more prominent than the minor veins, bases rounded or subcordate, margins with papillose-based cilia, apices acuminate. Primary panicles 5-11 cm, almost as wide as long, shortly exserted, with few spikelets; rachises and branches scabridulous and finely pubescent, hairs papillose-based. Spikelets 3.7-4.3 mm long, 1.6-2.1 mm wide, obovoid, turgid, often shiny, sparsely pustulose-villous. Lower glumes 1.8-2.5 mm, loose, strongly veined, acute; upper glumes shorter than the spikelets, strongly veined, purplish at the base; lower florets sterile; upper florets with a minute tuft of hairs around the umbonate apices. 2n = 18.
Distribution
Md., Okla., Miss., Tex., La., Mo., Del., Ala., D.C, Tenn., N.C., S.C., Va., Ark., Ill., Ga., Iowa, Ky., Fla.
Discussion
Dichanthelium ravenelii grows in dry, sandy wood¬lands of the southeastern United States. The primary panicles develop from early May through June, and are at least partly open-pollinated. The secondary panicles, which are produced from July through September, are cleistogamous. Putative hybrids with other species are very rare.
Selected References
None.