Difference between revisions of "Eragrostis obtusiflora"

(E. Fourn.) Scribn.
Common names: Alkali lovegrass
Treatment appears in FNA Volume 25. Treatment on page 89.
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Revision as of 19:23, 24 September 2019

Plants perennial; rhizomatous, sometimes also stoloniferous, with many innovations and scaly, sharp-tipped rhizomes 4-8 mm thick. Culms 15-40(50) cm, erect, stiff, hard. Sheaths hairy at the apices, hairs to 2 mm; ligules 0.2-0.4 mm, membranous, ciliate; blades 2-15 cm long, (1)2-4 mm wide, involute, arcuate, glabrous abaxially, scabrous adaxially, apices sharply pointed. Panicles terminal, 6-20(24) cm long, 2-8(12) cm wide, ovate, open or contracted; primary branches 1-8(15) cm, appressed or diverging up to 50° from the rachises; pulvini glabrous or not; pedicels 0-8 mm, appressed, lower pedicels on each branch shorter than 1 mm. Spikelets 8-14 mm long, 1.4-3 mm wide, ovate to lanceolate, stramineous with a reddish-purple tinge, with 5-10 florets; disarticulation basipetal, glumes persistent. Glumes unequal, chartaceous; lower glumes 2.4-3.6 mm; upper glumes 3-4.5 mm, sometimes 3-veined; lemmas 3.8-4.5 mm, ovate, leathery, 3(4, 5)-veined, lateral veins evident, greenish, upper margins hyaline, apices acute to obtuse, usually erose; paleas 3.8-4.5 mm, membranous, keels scabridulous, apices obtuse to truncate; anthers 3, 2-2.4 mm, purplish to yellowish. Caryopses 1.6-2 mm, ellipsoid, dorsally flattened, with a shallow adaxial groove, striate, reddish-brown. 2n = 40.

Discussion

Eragrostis obtusiflora is native to the southwestern United States and Mexico. It grows in dry or wet alkali flats, often in association with Distichlis and Sarcobatus, at 900-1400 m.

Selected References

None.

Lower Taxa

None.
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Paul M. Peterson +
(E. Fourn.) Scribn. +
Alkali lovegrass +
Conn. +, N.J. +, N.Y. +, Md. +, Va. +, Wash. +, W.Va. +, Mich. +, Wis. +, Del. +, D.C +, Ark. +, Kans. +, Minn. +, N.Dak. +, Nebr. +, Okla. +, S.Dak. +, Calif. +, Iowa +, Pacific Islands (Hawaii) +, Alta. +, B.C. +, Man. +, N.B. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Mass. +, Maine +, N.H. +, R.I. +, Vt. +, Fla. +, La. +, Mo. +, N.Mex. +, Tex. +, Wyo. +, Puerto Rico +, Oreg. +, Idaho +, N.C. +, Tenn. +, S.C. +, Ala. +, Virgin Islands +, Pa. +, Miss. +, Nev. +, Colo. +, Ill. +, Ohio +, Utah +, Ga. +, Ind. +, Ariz. +, Mont. +  and Ky. +
Gramineae +
Eragrostis obtusiflora +
Eragrostis +
species +