Eragrostis palmeri

S. Watson
Common names: Rio grande lovegrass
Treatment appears in FNA Volume 25. Treatment on page 93.

Plants perennial; cespitose, with innovations and knotty bases, without rhizomes, not glandular. Culms 50-90 (120) cm, glabrous below the nodes. Sheaths villous and the hairs not papillose-based, or mostly glabrous, apices hairy, hairs to 5 mm, not papillose-based; ligules 0.2-0.4 mm; blades (14) 20-35 cm long, 1-2.4 mm wide, involute, abaxial surfaces glabrous, adaxial surfaces scabridulous, sometimes sparsely hairy. Panicles 12-40 cm long, 4-20 cm wide, oblong, open; primary branches 2-20 cm, diverging 20-70° from the rachises, capillary; pulvini glabrous or sparsely hairy; pedicels (0.4) 1-4 (14) mm, appressed or diverging, only the terminal pedicels on each branch longer than 4 mm. Spikelets 4-6 (7.3) mm long, 1-2 mm wide, linear-lanceolate, plumbeous, with 5-12 florets; disarticulation acropetal, paleas persistent. Glumes lanceolate to ovate, hyaline; lower glumes 1.1-1.8 mm; upper glumes 1.2-2.2 mm, exceeded by the basal lemmas; lemmas 2-2.6 mm, ovate, membranous, hyaline towards the apices and margins, keels weak or strong, without glands, lateral-veins from inconspicuous to conspicuous, apices acute; paleas 1.7-2.4 mm, hyaline, bases not projecting beyond the lemmas, apices truncate, often notched; anthers 3, 0.6-1.3 mm, yellowish to purplish. Caryopses 0.6-0.8 mm, rectangular-prismatic to subellipsoid, laterally compressed, with a well-developed adaxial groove, faintly striate, opaque, reddish-brown. 2n = 40.

Discussion

Eragrostis palmeri grows on rocky slopes and hills between 300-2150 m, generally in association with Pinus edulis, Juniperus monosperma, Bouteloua gracilis, and Prosopis. Its range extends from the southwestern United States into Mexico. It resembles E. erosa, but differs in its shorter lemmas and caryopses.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Eragrostis palmeri"
yellowish +  and purplish +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
Notched (?) +  and Acute (?) +
Paul M. Peterson +
S. Watson +
1 (?) +  and 3 (?) +
multiple +, , +  and single +
not +  and glabrous +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
not projecting +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
20 cm200 mm <br />0.2 m <br /> (35 cm350 mm <br />0.35 m <br />) +
pubescent +  and glabrous +
involute +, folded +  and flat +
1mm;2.4mm +
not disarticulating +
not spikelike +
pubescent +  and glabrous +
reddish-brown +  and opaque +
compressed +, rectangular-prismatic +  and subellipsoid +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Rio grande lovegrass +
branched +, simple +  and rooting +
geniculate +
50 cm500 mm <br />0.5 m <br /> (90 cm900 mm <br />0.9 m <br />) +
not woody +
N.Mex. +  and Tex. +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
5 +  and 12 +
round +  and compressed +
reduced +
persistent +  and deciduous +
shorter or longer +
subtending +
lanceolate +  and ovate +
not papillose-based +
uncinate +
0 cm0 mm <br />0 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
paniculate +  and racemose +
hollow +  and solid +
strong +  and weak +
inconspicuous +  and conspicuous +
not absent +
(1)3(5)-veined +
0.2 cm2 mm <br />0.002 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
membranous +
sometimes longer +
ciliate +  and ciliolate +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
membranous +
inconspicuous +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
concealed +  and prominent +
2 +  and 1 +
persistent +
2-keeled +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
12cm +  and 40cm +
4 cm40 mm <br />0.04 m <br /> (20 cm200 mm <br />0.2 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (?) +
diverging +  and appressed +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
dry +  and fleshy +
2 cm20 mm <br />0.02 m <br /> (20 cm200 mm <br />0.2 m <br />) +
hairy +  and glabrous +
spikelike +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
1 +  and 60 +
linear-lanceolate +
1mm +  and 2mm +
1 (?) +  and 3 (?) +
compound +  and simple +
2 (?) +  and 3 (?) +
Gramineae +
Eragrostis palmeri +
Eragrostis +
species +
membranous +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
7 +  and 13 +
rhizomatous +  and stoloniferous +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +  and synoecious +