Difference between revisions of "Glyceria fluitans"
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|common_names=Water mannagrass;Glycerie flottante | |common_names=Water mannagrass;Glycerie flottante | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=I | ||
| + | |label=Introduced | ||
| + | }} | ||
|basionyms= | |basionyms= | ||
|synonyms= | |synonyms= | ||
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| − | |distribution=Md.;Mass.;Pa.;Calif.;Tenn.;N.Y.;Ark.;Pacific Islands (Hawaii);N.J.;Nfld. | + | |distribution=Md.;Mass.;Pa.;Calif.;Tenn.;N.Y.;Ark.;Pacific Islands (Hawaii);N.J.;Nfld. and Labr. (Labr.);N.S.;Idaho;S.Dak. |
|discussion=<p><i>Glyceria fluitans</i> is a Eurasian species. In the Americas, it has been collected from British Columbia to California on the west coast, in South Dakota, and from Newfoundland to Pennsylvania on the eastern seaboard. In Europe, it grows in rich, organic, wet soils, often near <i>G. notata</i>, with which it hybridizes. It is less tolerant of trampling than <i>G. notata</i>. Many earlier reports from eastern Canada are based on <i>G. borealis</i> or <i>G. septentrionalis</i> (Dore and McNeill 1980; Scoggan 1978). In western North America, it has been confused with <i>G. xoccidentalis</i>. It tends to differ from all three in its longer lemmas and anthers. Nevertheless, identification of some specimens will prove troublesome. For further discussion, see under the species mentioned.</p> | |discussion=<p><i>Glyceria fluitans</i> is a Eurasian species. In the Americas, it has been collected from British Columbia to California on the west coast, in South Dakota, and from Newfoundland to Pennsylvania on the eastern seaboard. In Europe, it grows in rich, organic, wet soils, often near <i>G. notata</i>, with which it hybridizes. It is less tolerant of trampling than <i>G. notata</i>. Many earlier reports from eastern Canada are based on <i>G. borealis</i> or <i>G. septentrionalis</i> (Dore and McNeill 1980; Scoggan 1978). In western North America, it has been confused with <i>G. xoccidentalis</i>. It tends to differ from all three in its longer lemmas and anthers. Nevertheless, identification of some specimens will prove troublesome. For further discussion, see under the species mentioned.</p> | ||
|tables= | |tables= | ||
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name=Glyceria fluitans | name=Glyceria fluitans | ||
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|authority=(L.) R. Br. | |authority=(L.) R. Br. | ||
|rank=species | |rank=species | ||
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|basionyms= | |basionyms= | ||
|family=Poaceae | |family=Poaceae | ||
| − | |distribution=Md.;Mass.;Pa.;Calif.;Tenn.;N.Y.;Ark.;Pacific Islands (Hawaii);N.J.;Nfld. | + | |illustrator=Cindy Roché |
| + | |illustration copyright=Utah State University | ||
| + | |distribution=Md.;Mass.;Pa.;Calif.;Tenn.;N.Y.;Ark.;Pacific Islands (Hawaii);N.J.;Nfld. and Labr. (Labr.);N.S.;Idaho;S.Dak. | ||
|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/V24/V24_101.xml |
|subfamily=Poaceae subfam. Pooideae | |subfamily=Poaceae subfam. Pooideae | ||
|tribe=Poaceae tribe Meliceae | |tribe=Poaceae tribe Meliceae | ||
Latest revision as of 16:21, 11 May 2021
Plants perennial. Culms 20-150 cm tall, 2-4 mm thick, erect or spreading, sometimes decumbent and rooting from the lower nodes, distal portion sometimes floating in shallow water. Sheaths glabrous, keeled; ligules 5-15 mm; blades 5-25 cm long, 3-10 mm wide, both surfaces smooth. Panicles 10-50 cm long, 2-3 cm wide; branches 3-5 cm, paired or solitary, usually appressed to ascending, divergent at anthesis, with 1-4 spikelets; pedicels 0.8-20 mm. Spikelets (15)18-39 mm long, 1.7-3.3 mm wide, cylindrical and terete, except slightly laterally compressed at anthesis, rectangular in side view, with 8-16 florets. Lower glumes 1.3-3.9 mm; upper glumes 2.7-5 mm; rachilla internodes 1.9-2.5 mm; lemmas 5.2-8 mm, midveins extending to within 0.1 mm of the apical margins, scabrous over and between the veins, prickles about 0.05 mm, apices acute, usually entire; paleas from shorter than to 0.6(1.5) mm longer than the lemmas, keels winged, apices bifid, teeth 0.1-0.4 mm, parallel to convergent, sometimes crossing when dry; anthers 1.5-3 mm, usually purple. Caryopses 2-3 mm. 2n = 40.
Distribution
Md., Mass., Pa., Calif., Tenn., N.Y., Ark., Pacific Islands (Hawaii), N.J., Nfld. and Labr. (Labr.), N.S., Idaho, S.Dak.
Discussion
Glyceria fluitans is a Eurasian species. In the Americas, it has been collected from British Columbia to California on the west coast, in South Dakota, and from Newfoundland to Pennsylvania on the eastern seaboard. In Europe, it grows in rich, organic, wet soils, often near G. notata, with which it hybridizes. It is less tolerant of trampling than G. notata. Many earlier reports from eastern Canada are based on G. borealis or G. septentrionalis (Dore and McNeill 1980; Scoggan 1978). In western North America, it has been confused with G. xoccidentalis. It tends to differ from all three in its longer lemmas and anthers. Nevertheless, identification of some specimens will prove troublesome. For further discussion, see under the species mentioned.
Selected References
None.