Difference between revisions of "Dissanthelium"
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| − | |discussion=<p | + | |discussion=<p>Dissanthelium contains about 20 species, and has an amphi-neotropical distribution. Most species grow in South America; two grow in North America. One of the two North American species, D. matbewsii (Ball) R.C. Foster & L.B. Sm., has a disjunct distribution, growing in both central Mexico and South America. The other, D. californicum, is discussed below.</p> |
|tables= | |tables= | ||
|references={{Treatment/Reference | |references={{Treatment/Reference | ||
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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/V24/V24_990.xml |
|subfamily=Poaceae subfam. Pooideae | |subfamily=Poaceae subfam. Pooideae | ||
|tribe=Poaceae tribe Poeae | |tribe=Poaceae tribe Poeae | ||
Revision as of 16:10, 30 October 2019
Plants annual or perennial; cespitose, sometimes rhizomatous. Culms to 10(25) cm. Sheaths open, usually glabrous, lower sheaths shorter than the upper sheaths; auricles absent; ligules 2-6 mm, membranous. Inflorescences contracted panicles, some branches longer than 1 cm. Spikelets pedicellate, 2.5-5 mm, laterally compressed, with 2(3) florets, all florets bisexual or some florets bisexual and others pistillate; disarticulation above the glumes, beneath the florets. Glumes equal or subequal, usually exceeding all the florets, sometimes subequal to them, ovate or acuminate, margins scarious, apices unawned; lower glumes 1-veined; upper glumes 3-veined; calluses poorly developed, glabrous; lemmas oval or elliptic, 3(5)-veined, lateral veins near the margins, glabrous, scabrous, or pilose, apices acute or obtuse, sometimes denticulate, unawned; paleas slightly shorter than the lemmas; lodicules 2; anthers 3. Caryopses shorter than the lemmas, concealed at maturity, x = unknown.
Discussion
Dissanthelium contains about 20 species, and has an amphi-neotropical distribution. Most species grow in South America; two grow in North America. One of the two North American species, D. matbewsii (Ball) R.C. Foster & L.B. Sm., has a disjunct distribution, growing in both central Mexico and South America. The other, D. californicum, is discussed below.