Family: Poaceae
[ Eragrostis bahiensis f. riparia Burkart , more, Eragrostis bahiensis var. bahiensis Schrad. ex Schult., Eragrostis bahiensis var. contracta Döll, Eragrostis bahiensis var. laxiuscula Döll, Eragrostis blepharophylla Jedwabn., Eragrostis expansa Link, Eragrostis firma Trin., Eragrostis macra Jedwabn., Eragrostis microstachya (Link) Link, Eragrostis pilosa var. bahiensis (Schrad. ex Schult.) Kuntze, Eragrostis psammodes Trin., Eragrostis psammodes var. microstachya (Link) Döll, Poa expansa (Link) Kunth, Poa microstachya Link, Poa psammodes (Trin.) Kunth] |
Plants perennial; cespitose, with innovations, without rhizomes, not glandular.
Culms 25-95(110) cm, erect, glabrous. Sheaths glabrous, summits
hairy, hairs 1-3 mm; ligules 0.2-0.4 mm; blades (8)12-40 cm long,
2-5 mm wide, flat to involute, abaxial surfaces glabrous, adaxial surfaces scabridulous
and glabrous or long ciliate basally. Panicles terminal, 15-30(45) cm long,
(4)8-17 cm wide, narrowly ovate, open to contracted; primary branches 5-15
cm, diverging 20-90° from the rachises, often capillary, usually naked basally;
pulvini glabrous; pedicels 0.3-6 mm, mostly appressed, scabridulous,
always shorter than the spikelets. Spikelets 6-15(18) mm long, 1.3-2(2.2)
mm wide, narrowly lanceolate, plumbeous, occasionally with a reddish-purple tinge,
with 8-30(40) florets; disarticulation usually in the rachilla below the
florets, occasionally the lemmas falling separately, leaving the paleas on the
rachilla. Glumes lanceolate to ovate, membranous to subhyaline, keeled;
lower glumes 1-1.4 mm; upper glumes 1.4-1.7 mm; lemmas 1.5-2.2
mm, broadly ovate, leathery, scabridulous, lateral veins evident, apices acute;
paleas 1.4-2.1 mm, hyaline, bases not projecting beyond the lemmas, keels
scabridulous, apices acute to obtuse; anthers 2, 0.4-0.6 mm, reddish-purple.
Caryopses 0.6-0.8 mm, obovoid to ellipsoid, terete, somewhat striate, reddish-brown.
2n = unknown.
Eragrostis bahiensis grows in sandy soils near river banks, lake shores,
and roadsides, at 0-200 m. Its range extends south from the Gulf Coast of the
United States through Mexico to Peru, Bolivia, Paraguay, and Argentina.
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