Difference between revisions of "Arthraxon hispidus"
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|common_names=Jointhead;Small carpetgrass | |common_names=Jointhead;Small carpetgrass | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=I | ||
| + | |label=Introduced | ||
| + | }} | ||
|basionyms= | |basionyms= | ||
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| − | |distribution=Del.;W.Va.;Pacific Islands (Hawaii);N.J.;N.Y.;Fla.;Tex.;La.;Tenn.;N.C.;S.C.;Pa.;Va.;Ind.;Ohio;Ala.;Miss.;Ark.;Ill.;Ga.;Mass.;Md.;Okla.;D.C;Oreg.;Mo.;Kans.;Ky. | + | |distribution=Del.;W.Va.;Pacific Islands (Hawaii);N.J.;N.Y.;Fla.;Tex.;La.;Tenn.;N.C.;S.C.;Pa.;Va.;Ind.;Ohio;Ala.;Miss.;Ark.;Ill.;Ga.;Mass.;Md.;Okla.;D.C.;Oreg.;Mo.;Kans.;Ky. |
|discussion=<p><i>Arthraxon hispidus</i> is native to Asia, but is naturalized and spreading along roadsides, shores, ditches and in low woods and fields of the eastern United States. It is also naturalized in Mexico, Central America, and the West Indies. Plants in the Flora region belong to <i>A. hispidus</i> (Thunb.) Makino <i></i>var.<i> hispidus</i>, the most widespread and variable of the four varieties. <i>Arthraxon</i> castratus (Griff.) V. Naray. ex Bor reported from Puerto Rico, differs from <i>A. hispidus</i> in having pilose lemma margins, a palea in its second floret, and three anthers.</p> | |discussion=<p><i>Arthraxon hispidus</i> is native to Asia, but is naturalized and spreading along roadsides, shores, ditches and in low woods and fields of the eastern United States. It is also naturalized in Mexico, Central America, and the West Indies. Plants in the Flora region belong to <i>A. hispidus</i> (Thunb.) Makino <i></i>var.<i> hispidus</i>, the most widespread and variable of the four varieties. <i>Arthraxon</i> castratus (Griff.) V. Naray. ex Bor reported from Puerto Rico, differs from <i>A. hispidus</i> in having pilose lemma margins, a palea in its second floret, and three anthers.</p> | ||
|tables= | |tables= | ||
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|illustrator=Linda A. Vorobik;Hana Pazdírková | |illustrator=Linda A. Vorobik;Hana Pazdírková | ||
|illustration copyright=Utah State University | |illustration copyright=Utah State University | ||
| − | |distribution=Del.;W.Va.;Pacific Islands (Hawaii);N.J.;N.Y.;Fla.;Tex.;La.;Tenn.;N.C.;S.C.;Pa.;Va.;Ind.;Ohio;Ala.;Miss.;Ark.;Ill.;Ga.;Mass.;Md.;Okla.;D.C;Oreg.;Mo.;Kans.;Ky. | + | |distribution=Del.;W.Va.;Pacific Islands (Hawaii);N.J.;N.Y.;Fla.;Tex.;La.;Tenn.;N.C.;S.C.;Pa.;Va.;Ind.;Ohio;Ala.;Miss.;Ark.;Ill.;Ga.;Mass.;Md.;Okla.;D.C.;Oreg.;Mo.;Kans.;Ky. |
|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_1625.xml |
|subfamily=Poaceae subfam. Panicoideae | |subfamily=Poaceae subfam. Panicoideae | ||
|tribe=Poaceae tribe Andropogoneae | |tribe=Poaceae tribe Andropogoneae | ||
Latest revision as of 17:57, 11 May 2021
Plants annual. Culms 0.5-1(2) m, weak, often decumbent and rooting at the lower nodes; nodes hispid. Leaves cauline; sheaths usually shorter than the internodes; ligules 0.4-3.5 mm, ciliate; lower blades 1-7.5 cm long, 4-20 mm wide, cordate-clasping, ovate to ovate-lanceolate, flat, margins ciliate (sometimes sparingly so), surfaces usually glabrous, abaxial surface rarely hispidulous; upper blades greatly reduced. Panicles 1.3-7 cm, flabellate or contracted, with 12-20 rames; rames 1-6(11) cm. Sessile spikelets: glumes 3-5.5 mm, lanceolate; lower glumes several-veined; upper glumes 1- or 3-veined; awns 0.3-9 mm, included or exserted, usually twisted below, sometimes geniculate at midlength; anthers usually 2, 0.5-0.7 mm. Pedicels absent or to 2 mm. Pedicellate spikelets absent. 2n = 36.
Distribution
Del., W.Va., Pacific Islands (Hawaii), N.J., N.Y., Fla., Tex., La., Tenn., N.C., S.C., Pa., Va., Ind., Ohio, Ala., Miss., Ark., Ill., Ga., Mass., Md., Okla., D.C., Oreg., Mo., Kans., Ky.
Discussion
Arthraxon hispidus is native to Asia, but is naturalized and spreading along roadsides, shores, ditches and in low woods and fields of the eastern United States. It is also naturalized in Mexico, Central America, and the West Indies. Plants in the Flora region belong to A. hispidus (Thunb.) Makino var. hispidus, the most widespread and variable of the four varieties. Arthraxon castratus (Griff.) V. Naray. ex Bor reported from Puerto Rico, differs from A. hispidus in having pilose lemma margins, a palea in its second floret, and three anthers.
Selected References
None.