Paspalum setaceum var. psammophilum

(Nash) D.J. Banks
Common names: Sand paspalum
Endemic
Treatment appears in FNA Volume 25.

Plants spreading to prostrate. Leaves mostly cauline; blades to 16 cm long, 2.8-8.3 mm wide, lax to straight, grayish-green, surfaces and margins evidently hirsute, with soft, short hairs. Panicle branches 3.1-5.9 cm; branch axes 0.7-1 mm wide. Spikelets 1.8-2.2 mm long, 1.6-1.8 mm wide, suborbicular to orbicular, pubescent; lower lemmas without an evident midvein; upper florets 1.8-2.1 mm.

Discussion

Paspalum setaceum var. psammophilum grows in sandy, maritime habitats and, inland, along sandy roadsides and in dry fields, from Massachusetts to the District of Columbia. The combination of its spreading to prostrate habit and densely puberulent foliage distinguishes it from other varieties of P. setaceum.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."elongated" is not a number.

anatomy +  and kranz +
Charles M. Allen +  and David W. Hall +
(Nash) D.J. Banks +
1 (?) +  and 3 (?) +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
disarticulating +  and pseudopetiolate +
0 cm0 mm <br />0 m <br /> (16 cm160 mm <br />0.16 m <br />) +
pubescent +  and glabrous +
usually linear +  and lanceolate occasionally ovate +
2.8mm;8.3mm +
17 cm170 mm <br />0.17 m <br /> (?) +
0.7mm +  and 1mm +
ascending;spreading +
spikelike +
not developed +
ringlike +
elliptic +  and suborbicular +
sometimes longer +
Sand paspalum +
branched +  and solid +
prostrate +, spreading +  and erect +
25 cm250 mm <br />0.25 m <br /> (110 cm1,100 mm <br />1.1 m <br />) +
Conn. +, N.J. +, N.Y. +, Va. +, Del. +, D.C. +, Wis. +, W.Va. +, Ont. +, Fla. +, N.H. +, N.Mex. +, Tex. +, La. +, Tenn. +, N.C. +, S.C. +, Pa. +, Mass. +, R.I. +, Vt. +, Puerto Rico +, Colo. +, Md. +, Ala. +, Ark. +, Ill. +, Ga. +, Ind. +, Iowa +, Ariz. +, Kans. +, Nebr. +, Okla. +, Ohio +, Mo. +, Minn. +, Mich. +, Mont. +, Miss. +, Ky. +  and S.Dak. +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
shorter or longer +
subtending +
unequal +
membranous +
uncinate +
bracteate +  and ebracteate +
solid +  and hollow +
coriaceous +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
membranous +
inconspicuous +
complex +  and simple +
concealed +  and prominent +
pubescent +  and glabrous +
2 +  and 1 +
3.1 cm31 mm <br />0.031 m <br /> (5.9 cm59 mm <br />0.059 m <br />) +
subterranean +
spreading +  and erect +
dry +  and fleshy +
pubescent +  and glabrous +
subsessile +  and shortly pedicellate +
imbricate +  and paired +
brown +  and stramineous +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
1 +  and 60 +
unisexual +  and bisexual +
suborbicular +  and orbicular +
1.6mm +  and 1.8mm +
1 (?) +  and 3 (?) +
fused +  and free +
2 (?) +  and 3 (?) +
dome--shaped +  and triangular +
grayish-green +
Gramineae +
Paspalum setaceum var. psammophilum +
Paspalum setaceum +
variety +
membranous +
stipitate +  and sessile +
rounded +  and acute +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
glandular-pubescent +  and glabrous +
stramineous +  and dark-brown +
smooth +  and slightly rugose +
glandular-pubescent +  and glabrous +
smooth +  and slightly rugose +
aquatic +  and terrestrial +
spreading +  and prostrate +
dioecious +, monoecious +  and synoecious +