Eragrostis silveana

Swallen
Common names: Silveus' lovegrass
Treatment appears in FNA Volume 25. Treatment on page 91.

Plants perennial; cespitose, with innovations and short, knotty rhizomes less than 4 mm thick. Culms 45-60 cm, erect, often glandular below the nodes, sometimes viscid. Sheaths often viscid, sometimes sparsely pilose, hairy at the apices, hairs to 6 mm; ligules 0.2-0.3 mm; blades 8-25 cm long, 2-4 mm wide, flat to involute, glabrous, sometimes viscid. Panicles 20-35 (42) cm long, 10-22 cm wide, broadly ovate, open, bases included in the upper¬most leaf-sheaths; primary branches 5-14 cm, diverging 20-90° from the rachises, capillary, sometimes viscid, naked basally; pulvini hairy, hairs to 6 mm; pedicels (1) 1.5-12 mm, diverging or appressed. Spikelets (2.5) 3-4.8 mm long, 0.9-1.4 mm wide, linear-lanceolate, reddish-purple, with 4-9 florets; disarticulation basipetal, glumes persistent. Glumes lanceolate, membranous; lower glumes 0.9-1.2 mm; upper glumes 1-1.3 mm; lemmas 1.1-1.4 mm, ovate to lanceolate, membranous, 3-veined, apices acute; paleas 1-1.4 mm, hyaline, not wider than the lemmas, apices obtuse; anthers 3, 0.2-0.3 mm, purplish. Caryopses 0.5-0.6 mm, ellipsoid, terete in cross-section, neither ridged nor grooved, faintly striate, reddish-brown. 2n = unknown.

Discussion

Eragrostis silveana grows in various open habitats, from sandy prairies to clay loam flats, near roadsides, railroads, and fields at 0-100 m. Its range is limited to the coastal plain of Texas and northern Mexico. Morphologically, E. silveana is somewhat intermediate between E. spectabilis and E. curtipedicellata, and grows where the distribution of these two species overlaps.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Eragrostis silveana"
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
obtuse +  and acute +
Paul M. Peterson +
Swallen +
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 +
8 cm80 mm <br />0.08 m <br /> (25 cm250 mm <br />0.25 m <br />) +
flat +  and involute +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
not disarticulating +
not spikelike +
pubescent +  and glabrous +
reddish-brown +
ridged +, terete +  and ellipsoid +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Silveus' lovegrass +
branched +, simple +  and rooting +
geniculate +
45 cm450 mm <br />0.45 m <br /> (60 cm600 mm <br />0.6 m <br />) +
not woody +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
4 +  and 9 +
round +  and compressed +
reduced +
persistent +
shorter or longer +
subtending +
lanceolate +
membranous +
uncinate +
0 cm0 mm <br />0 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
paniculate +  and racemose +
hollow +  and solid +
not absent +
ovate +  and lanceolate +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
membranous +
sometimes longer +
ciliate +  and ciliolate +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
membranous +
inconspicuous +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
concealed +  and prominent +
2 +  and 1 +
persistent +
2-keeled +
0.1 cm1 mm <br />0.001 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
not wider +
20cm +  and 35cm +
10 cm100 mm <br />0.1 m <br /> (22 cm220 mm <br />0.22 m <br />) +
1 cm10 mm <br />0.01 m <br /> (?) +
appressed +  and diverging +
0.15 cm1.5 mm <br />0.0015 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
dry +  and fleshy +
5 cm50 mm <br />0.05 m <br /> (14 cm140 mm <br />0.14 m <br />) +
spikelike +
0 cm0 mm <br />0 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
hairy +  and pilose +
0.3 cm3 mm <br />0.003 m <br /> (0.48 cm4.8 mm <br />0.0048 m <br />) +
1 +  and 60 +
linear-lanceolate +
0.9mm +  and 1.4mm +
1 +  and 3 +
compound +  and simple +
2 (?) +  and 3 (?) +
Gramineae +
Eragrostis silveana +
Eragrostis +
species +
membranous +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
7 (?) +  and 13 (?) +
rhizomatous +  and stoloniferous +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +  and synoecious +