Eragrostis swallenii

Hitchc.
Common names: Swallen's lovegrass
Treatment appears in FNA Volume 25. Treatment on page 93.

Plants perennial; cespitose, with innovations, without rhizomes. Culms 35-70 cm, erect, with glandular bands below the nodes. Sheaths hairy on the margins and at the apices, hairs to 4 mm; ligules 0.2-0.5 mm; blades (8) 10-25 (30) cm long, 1.5-4 mm wide, flat to involute, abaxial surfaces glabrous, adaxial surfaces scabridulous, sometimes also sparsely hairy, hairs to 4 mm. Panicles 12-30 cm long, 5-16 cm wide, ovate, open, an oblique glandular ring present below the lowest rachis node; primary branches 2-10 cm, diverging 10-70° from the rachises, flexible; pulvini glabrous; pedicels 1.5-14 mm, divergent, with a glandular band. Spikelets 5-16 mm long, 1.2-2.3 mm wide, linear-lanceolate, plumbeous to dark reddish-purple, with 5-25 florets; disarticulation acropetal, paleas persistent. Glumes ovate, membranous to hyaline; lower glumes 1.1-1.5 mm; upper glumes 1.4-2 mm; lemmas 1.5-2.5 mm, ovate, membranous, strongly keeled, keels without glands, lateral-veins conspicuous, apices acute; paleas 1.2-2.1 mm, hyaline, narrower than the lemmas, apices obtuse to truncate; anthers 3, 0.3-0.5 mm, purplish. Caryopses 0.8-1.1 mm, rectangular-prismatic to ellipsoid, somewhat laterally compressed, with a well-developed adaxial groove, smooth, faintly striate, mostly opaque, light reddish-brown. 2n = 84.

Discussion

Eragrostis swallenii grows in sandy sites along coastal grasslands and roadsides, often with Andropogon and Spartina, at 30-150 m. Its range extends around the Gulf coast from Texas to Mexico.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Eragrostis swallenii"
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Obtuse (?) +  and Truncate (?) +
0 cm0 mm <br />0 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Paul M. Peterson +
Hitchc. +
1 (?) +  and 3 (?) +
multiple +, , +  and single +
not +  and glabrous +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
10 cm100 mm <br />0.1 m <br /> (25 cm250 mm <br />0.25 m <br />) +
pubescent +  and glabrous +
flat +  and involute +
1.5mm;4mm +
not disarticulating +
not spikelike +
pubescent +  and glabrous +
light reddish-brown +  and opaque +
compressed +, rectangular-prismatic +  and ellipsoid +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Swallen's lovegrass +
branched +, simple +  and rooting +
geniculate +
35 cm350 mm <br />0.35 m <br /> (70 cm700 mm <br />0.7 m <br />) +
not woody +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
5 +  and 25 +
round +  and compressed +
reduced +
persistent +  and deciduous +
shorter or longer +
subtending +
membranous +
uncinate +
0 cm0 mm <br />0 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
paniculate +  and racemose +
hollow +  and solid +
not absent +
(1)3(5)-veined +
keeled +  and ovate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
membranous +
sometimes longer +
ciliate +  and ciliolate +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
membranous +
inconspicuous +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
concealed +  and prominent +
2 +  and 1 +
persistent +
2-keeled +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
narrower +
12cm +  and 30cm +
5 cm50 mm <br />0.05 m <br /> (16 cm160 mm <br />0.16 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
dry +  and fleshy +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
spikelike +
plumbeous +  and dark reddish-purple +
0.5 cm5 mm <br />0.005 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
1 +  and 60 +
linear-lanceolate +
1.2mm +  and 2.3mm +
1 (?) +  and 3 (?) +
compound +  and simple +
2 (?) +  and 3 (?) +
Gramineae +
Eragrostis swallenii +
Eragrostis +
species +
membranous +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
7 +  and 13 +
rhizomatous +  and stoloniferous +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +  and synoecious +