Difference between revisions of "Pennisetum polystachion"
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|common_names=Mission grass | |common_names=Mission grass | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=I | ||
| + | |label=Introduced | ||
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|basionyms= | |basionyms= | ||
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|distribution=Puerto Rico;Tex.;Fla.;Pacific Islands (Hawaii) | |distribution=Puerto Rico;Tex.;Fla.;Pacific Islands (Hawaii) | ||
| − | |discussion=<p>Pennisetum polystachion is a polymorphic, weedy African species that has become established in the tropics and subtropics, including Florida. The U.S. Department of Agriculture considers it a noxious weed. Only Pennisetum polystachion subsp. setosum (Sw.) Brunken has been found in the Flora region. It differs from P. polystachion (L.) Schutt. subsp. polystachion as indicated:</p> | + | |discussion=<p><i>Pennisetum polystachion</i> is a polymorphic, weedy African species that has become established in the tropics and subtropics, including Florida. The U.S. Department of Agriculture considers it a noxious weed. Only <i>Pennisetum polystachion</i> subsp. setosum (Sw.) Brunken has been found in the Flora region. It differs from <i>P. polystachion</i> (L.) Schutt. subsp. polystachion as indicated:</p> |
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Pennisetum polystachion | name=Pennisetum polystachion | ||
| − | |||
|authority=(L.) Schult. | |authority=(L.) Schult. | ||
|rank=species | |rank=species | ||
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|basionyms= | |basionyms= | ||
|family=Poaceae | |family=Poaceae | ||
| + | |illustrator=Linda A. Vorobik | ||
| + | |illustration copyright=Utah State University | ||
|distribution=Puerto Rico;Tex.;Fla.;Pacific Islands (Hawaii) | |distribution=Puerto Rico;Tex.;Fla.;Pacific Islands (Hawaii) | ||
|reference=None | |reference=None | ||
|publication title= | |publication title= | ||
|publication year= | |publication year= | ||
| − | |special status= | + | |special status=Introduced |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/200273ad09963decb8fc72550212de541d86569d/coarse_grained_fna_xml/V25/V25_1360.xml |
|subfamily=Poaceae subfam. Panicoideae | |subfamily=Poaceae subfam. Panicoideae | ||
|tribe=Poaceae tribe Paniceae | |tribe=Poaceae tribe Paniceae | ||
Latest revision as of 18:56, 11 May 2021
Plants annual or perennial; cespitose from a hard, knotty base. Culms 30-200 cm, erect, branching; nodes glabrous. Sheaths glabrous, margins ciliate; ligules 1.5-2.7 mm; blades 15-55 cm long, 4-18 mm wide, flat, glabrous or pubescent. Panicles terminal, 10-25 cm long, 15-30 mm wide, fully exerted from the sheaths, erect to drooping, white, yellow, light brown, or pink to deep purple; rachises terete, scabrous. Fascicles 33-45 per cm, disarticulating at maturity; fascicles axes 0.2-0.5 mm, with 1 spikelet; outer bristles 13-30, 1.3-5 mm, scabrous; inner bristles 6-14, 4.3-11.5 mm, long ciliate; primary bristles 14-25 mm, long-ciliate, noticeably longer than the other bristles. Spikelets 3-4.5 mm, sessile; lower glumes absent or to 2 mm, veinless; upper glumes 3-4.5 mm, glabrous, 5-7-veined, 3-lobed; lower florets sterile or staminate; lower lemmas 3-3.9 mm, 5-7-veined, apices lobed; lower paleas 2.9-3.7 mm; anthers absent or 1.7-2 mm; upper florets disarticulating at maturity; upper lemmas 1.7-3 mm, coriaceous, shiny, 5-veined, apices ciliate; anthers 1.3-2.1 mm. Caryopses about 1.7 mm, concealed by the lemma and palea at maturity. 2n = 18, 36, 45, 48, 52, 53, 54, 56, 78.
Distribution
Puerto Rico, Tex., Fla., Pacific Islands (Hawaii)
Discussion
Pennisetum polystachion is a polymorphic, weedy African species that has become established in the tropics and subtropics, including Florida. The U.S. Department of Agriculture considers it a noxious weed. Only Pennisetum polystachion subsp. setosum (Sw.) Brunken has been found in the Flora region. It differs from P. polystachion (L.) Schutt. subsp. polystachion as indicated:
Selected References
None.
Lower Taxa
Key
| 1 | Plants annual, usually profusely branching; fascicles white, pink, red, or deep purple | Pennisetum polystachion subsp. polystachion |
| 1 | Plants perennial, usually sparingly branched; fascicles yellow, light brown, or purplish | Pennisetum polystachion subsp. setosum |