Triplasis americana

P. Beauv.
Common names: Perennial sandgrass
Endemic
Treatment appears in FNA Volume 25. Treatment on page 42.

Plants perennial; cespitose. Culms 30-80 cm, usually erect; nodes and internodes appressed-pubescent. Sheaths glabrous or pilose, margins ciliate; ligules to 2 mm, membranous, ciliate; blades to 20 cm long, usually less than 2 mm wide, filiform, scabrous adaxially. Panicles 1-5 cm long, 1-3 cm wide, occasionally reduced to a raceme. Spikelets 9-12 mm, with 2-5 florets. Glumes subequal, 3.4-4.5 mm, acuminate; lemmas 4-8 mm, lobes 4.5-8 mm, tapering to the acute apices; awns 8-11 mm, divergent; paleas 2-3 mm, keels ciliate; anthers 1.5-2 mm, yellow. Caryopses 1.5-2.5 mm, ovoid, tan. 2n = unknown.

Distribution

Ga., La., Ala., N.C., S.C., Miss., Fla.

Discussion

Triplasis americana is endemic to the southeastern United States. It grows on sandy soils in prairies and woods, being less common in maritime dunes than Triplasis purpurea.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Triplasis americana"
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Stephan L. Hatch +
P. Beauv. +
1 (?) +  and 3 (?) +
multiple +, , +  and single +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
0 cm0 mm <br />0 m <br /> (20 cm200 mm <br />0.2 m <br />) +
pubescent +  and glabrous +
filiform +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
spikelike +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Perennial sandgrass +
30 cm300 mm <br />0.3 m <br /> (80 cm800 mm <br />0.8 m <br />) +
not woody +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Ga. +, La. +, Ala. +, N.C. +, S.C. +, Miss. +  and Fla. +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
2 +  and 5 +
fertile +  and sterile +
round +  and compressed +
reduced +
shorter or longer +
subtending +
acuminate +
subequal +
0.34 cm3.4 mm <br />0.0034 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
uncinate +
paniculate +  and racemose +
hollow +  and solid +
appressed-pubescent +
not absent +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
sometimes longer +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
membranous +
tapering +
inconspicuous +
concealed +  and prominent +
appressed-pubescent +
2 +  and 1 +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
1cm +  and 5cm +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
dry +  and fleshy +
spikelike +
pilose +  and glabrous +
compressed +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
1 +  and 3 +
compound +  and simple +
pink +  and purple +
2 (?) +  and 3 (?) +
Gramineae +
Triplasis americana +
Triplasis +
species +
membranous +
7 (?) +  and 13 (?) +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +