Difference between revisions of "Eragrostis unioloides"
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|subfamily=Poaceae subfam. Chloridoideae | |subfamily=Poaceae subfam. Chloridoideae | ||
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Latest revision as of 17:56, 11 May 2021
Plants annual; tufted, without innovations, without glands. Culms 10-50 cm, erect, glabrous below the nodes. Leaves mostly basal; sheaths mostly glabrous, apices pilose, hairs 0.4-3 mm; ligules 0.1-0.2 mm, ciliate; blades (1.8)5-12 cm long, 2-6 mm wide, flat to involute, abaxial surfaces glabrous, adaxial surfaces scabridulous and glabrous or sparsely hairy, hairs appressed. Panicles 6-15 cm long, 0.5-7 cm wide, ovate, open to contracted; primary branches 0.2-5 cm, appressed or diverging up to 70° from the rachises, glabrous; pulvini glabrous; pedicels 2-8 mm, glabrous. Spikelets 4-8(10) mm long, (1.6)2-4 mm wide, ovate-lanceolate, loosely imbricate, straw-colored to purplish, with 12-42 florets; disarticulation acropetal, paleas not persistent, rachillas persistent. Glumes ovate-lanceolate to lanceolate, hyaline to membranous; lower glumes 1-1.8 mm; upper glumes 1-2.2 mm; lemmas 1.5-1.9 mm, broadly ovate, membranous, lateral veins raised, apices obtuse to acute; paleas 1.4-1.9 mm, hyaline, keels scabridulous, apices acute to obtuse; anthers 2, 0.2-0.4 mm, purplish. Caryopses 0.6-0.9 mm, ellipsoid, laterally compressed, not grooved, smooth, light brown. 2n = 20, ca. 30.
Distribution
Md., Pacific Islands (Hawaii), Fla., Ga.
Discussion
Eragrostis unioloides is an Asian species that is now established in the southeastern United States, growing along roadsides and in disturbed ground, at 20-150 m.
Selected References
None.