Difference between revisions of "Oplismenus hirtellus"
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|distribution=Md.;Okla.;Miss.;Ala.;N.C.;La.;Puerto Rico;Virgin Islands;Va.;S.C.;Ark.;Fla.;Ga.;Pacific Islands (Hawaii);Mo.;Tex. | |distribution=Md.;Okla.;Miss.;Ala.;N.C.;La.;Puerto Rico;Virgin Islands;Va.;S.C.;Ark.;Fla.;Ga.;Pacific Islands (Hawaii);Mo.;Tex. | ||
| − | |discussion=<p | + | |discussion=<p>Oplismenus hirtellus grows at scattered locations in the southeastern United States, extending south in subtropical and tropical habitats to Argentina. Scholz (1981) recognized 11 subspecies and two forms within the species, but they overlap, both morphologically and geographically. The key below is included for convenience. It includes the three subspecies attributed to the Flora region. In addition, a variegated form culti</p> |
|tables= | |tables= | ||
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|basionyms= | |basionyms= | ||
|family=Poaceae | |family=Poaceae | ||
| + | |illustrator=Linda A. Vorobik and Karen Klitz | ||
|distribution=Md.;Okla.;Miss.;Ala.;N.C.;La.;Puerto Rico;Virgin Islands;Va.;S.C.;Ark.;Fla.;Ga.;Pacific Islands (Hawaii);Mo.;Tex. | |distribution=Md.;Okla.;Miss.;Ala.;N.C.;La.;Puerto Rico;Virgin Islands;Va.;S.C.;Ark.;Fla.;Ga.;Pacific Islands (Hawaii);Mo.;Tex. | ||
|reference=None | |reference=None | ||
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|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_1104.xml |
|subfamily=Poaceae subfam. Panicoideae | |subfamily=Poaceae subfam. Panicoideae | ||
|tribe=Poaceae tribe Paniceae | |tribe=Poaceae tribe Paniceae | ||
Revision as of 16:13, 30 October 2019
Plants perennial. Culms to 90 cm, mostly decumbent and rooting at the nodes, distal 15-35 cm ascending when flowering; nodes usually pubescent; internodes usually pubescent along 1 side (sometimes glabrous). Sheaths conspicuously ciliate on the margins; ligules 0.4-1.6(2.3) mm, ciliate; blades (0.6)1.3-11.5 cm long, 2-20 mm wide, glabrous, scabrous, or pubescent, margin(s) usually undu-lating. Panicles (1.5)2.5-16.5 cm, with 2-10 primary branches; branches 0.1-2.5 cm. Spikelets 2.2-3.5(4.5) mm; calluses shortly pubescent at the base awns usually purplish. Lower glumes 1.5-3 mm, scabridulous and/or pubescent, 3-5-veined, awns (1.6)3.2-14.5 mm; upper glumes 1.5-2.5 mm, sparsely pubescent, 5-7-veined, awns 0.8-6(10) mm; lower florets usually sterile, occasionally staminate; lower lemmas 2.2-3.1 mm, sparsely pubescent above, (5)7-9-veined, awns 0.1-1.2 mm; lower paleas absent or to 2.3 mm, hyaline; upper lemmas (2.1)2.3-3 mm, glabrous, weakly cartilaginous, white to cream-colored; anthers 3, 1.3-1.7 mm. Caryopses 1.7-1.8 mm long, 0.5-0.9 mm wide, glabrous. 2n = 36, (54), 72, (90).
Distribution
Md., Okla., Miss., Ala., N.C., La., Puerto Rico, Virgin Islands, Va., S.C., Ark., Fla., Ga., Pacific Islands (Hawaii), Mo., Tex.
Discussion
Oplismenus hirtellus grows at scattered locations in the southeastern United States, extending south in subtropical and tropical habitats to Argentina. Scholz (1981) recognized 11 subspecies and two forms within the species, but they overlap, both morphologically and geographically. The key below is included for convenience. It includes the three subspecies attributed to the Flora region. In addition, a variegated form culti
Selected References
None.
Lower Taxa
Key
| 1 | Sheaths and culms noticeably pilose, the hairs 1-3 mm long; lemmas 7-veined | Oplismenus hirtellus subsp. undulatifolius |
| 1 | Sheaths and culms glabrous or with a few, scattered hairs less than 1 mm long; lemmas (7)9-11-veined. | > 2 |
| 2 | Spikelets 2.2-2.7(3.3) mm long; lowest panicle branches 0.1-0.5 cm long | Oplismenus hirtellus subsp. setarius |
| 2 | Spikelets 3-3.4(4.5) mm long; lowest panicle branches 0.5-0.7 cm long | Oplismenus hirtellus subsp. fasciculatus |