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Eragrostis airoides Nees   (redirected from: Sporobolus brasiliensis (Raddi) Hack.)
Go To Encyclopedia of Life...
Family: Poaceae
Darnel Love Grass
[Airopsis millegrana Griseb., moreEragrostis airoides var. pluriflora Döll, Eragrostis brasiliensis (Raddi) Nees, Eragrostis triflora Ekman, Poa airoides , Sporobolus brasiliensis (Raddi) Hack., Sporobolus ramosissimus Kunth]
Eragrostis airoides image
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Paul M. Peterson. Flora of North America

Plants perennial; cespitose, with innovations, without rhizomes, not glandular. Culms 30-110 cm, erect, glabrous below the nodes. Sheaths glabrous or pilose, hairs to 5 mm; ligules 0.1-0.2 mm; blades 8-22 mm long, (1)2-4(5) mm wide, flat to folded, glabrous abaxially, scabridulous adaxially. Panicles 18-70 cm long, 3-25 cm wide, diffuse, ovate; primary branches 4-20 cm, appressed or diverging 10-70° from the rachises, naked basally; pulvini glabrous; pedicels 2.4-11 mm, divergent. Spikelets 1.3-2 mm long, 0.8-1.8 mm wide, ovate to lanceolate, plumbeous, with 1-3 florets; disarticulation acropetal, in the rachilla below the florets, glumes deciduous; rachilla prolonged above the terminal floret. Glumes lanceolate to ovate, membranous; lower glumes 0.8-1 mm; upper glumes 1.1-1.4 mm; lemmas 0.8-1.2 mm, ovate, membranous, plumbeous, keels and lateral veins inconspicuous, apices obtuse; paleas 0.8-1.2 mm, membranous, bases not projecting beyond the lemmas, apices obtuse; anthers 3, 0.3-0.5 mm, purplish. Caryopses 0.4-0.5 mm, ovoid, reticulate, reddish-brown. 2n = 36 (Davidse, pers. comm.).

Eragrostis airoides is a South American species that, in the Flora region, is known only from roadsides and disturbed sites in Brazos County, Texas. It is an enigmatic species, often treated as Sporobolus brasiliensis (Raddi) Hack., which it resembles in its chromosome base number of x = 9 and caryopsis morphology, but its frequent possession of spikelets with more than 1 floret and its mode of spikelet disarticulation argue for its retention in Eragrostis.

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Eragrostis airoides
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The National Science Foundation
Developments of SEINet, Symbiota, and associated specimen databases have been supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)