Aristida lanosa

Muhl. ex Elliott
Common names: Wooly threeawn
Endemic
Treatment appears in FNA Volume 25. Treatment on page 338.

Plants perennial; loosely cespitose. Culms 65-150 cm, sometimes thickened at the base, erect, unbranched; internodes glabrous; nodes concealed. Leaves cauline; sheaths longer than the internodes, usually lanose-floccose, occasionally glabrate; ligules about 0.1 mm; blades 10-25 (30) cm long, 2-6 mm wide, flat, light green or slightly blue-green, glabrous abaxially. Inflorescences paniculate, (25) 35-70 (82) cm long, (2) 3-8 (10) cm wide; rachis nodes lanose-floccose; primary branches 3-12 cm, appressed at the base, without axillary pulvini, ascending to spreading distally, sometimes loose and somewhat flexible, with 4-12 spikelets per branch. Glumes usually unequal, 1-veined, brownish-green to dark-brown or purplish; lower glumes 8.7-18 mm, with a keeled midvein; upper glumes 8.4-15 mm, awn-tipped, awns to 3 mm; calluses 0.5-1 mm; lemmas 6.5-10 mm, smooth to scabridulous, mostly dark purplish-mottled, slightly narrowed distally but not beaked, junction with the awns not evident; central awns 12-28 mm, curved at the base, often strongly so; lateral awns 7-17 mm, at least Yi as long as the central awns; anthers 3, about 3 mm, brown. Caryopses 5-6 mm, chestnut-brown. 2n = unknown.

Distribution

Md., N.J., Okla., Miss., Tex., La., W.Va., Mo., Del., Ala., Tenn., N.C., S.C., Va., Ark., Ill., Ga., Fla.

Discussion

Aristida lanosa is restricted to the eastern United States, where it grows in dry fields, pine-oak woods, and uplands, chiefly in sandy soil. It is sometimes confused with A. palustris, but differs in several reproductive, vegetative, and habitat characteristics.

Selected References

None.

Lower Taxa

None.

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

... more about "Aristida lanosa"
3 cm30 mm <br />0.03 m <br /> (?) +
Kelly W. Allred +
Muhl. ex Elliott +
1 (?) +  and 3 (?) +
straight +
ascending +  and spreading +
not evident +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
keeled +  and rounded +
coiled +, disarticulating +  and twisted +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
straight +
blue-green +  and light green +
10 cm100 mm <br />0.1 m <br /> (25 cm250 mm <br />0.25 m <br />) +
usually linear +  and lanceolate occasionally ovate +
2mm;6mm +
spikelike +
well-developed +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
chestnut-brown +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
non-radiate +  and radiate +
1.2 cm12 mm <br />0.012 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
Wooly threeawn +
65 cm650 mm <br />0.65 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
not woody +
Md. +, N.J. +, Okla. +, Miss. +, Tex. +, La. +, W.Va. +, Mo. +, Del. +, Ala. +, Tenn. +, N.C. +, S.C. +, Va. +, Ark. +, Ill. +, Ga. +  and Fla. +
large +  and small +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
brownish-green +  and dark-brown or purplish +
subtending +
acute +  and acuminate +
unequal +
35cm +  and 70cm +
0.7 cm7 mm <br />0.007 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
dark purplish-mottled +
smooth +  and scabridulous +
narrowed +
0.65 cm6.5 mm <br />0.0065 m <br /> (1 cm10 mm <br />0.01 m <br />) +
coriaceous +
indistinguishable +
0.1 cm1 mm <br />0.001 m <br /> (?) +
inconspicuous +
0.87 cm8.7 mm <br />0.0087 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
2 +  and 1 +
concealing +
0 +  and 1/2 +
dry +  and fleshy +
divaricate +  and divergent +
ascending;spreading +
3 cm30 mm <br />0.03 m <br /> (12 cm120 mm <br />0.12 m <br />) +
not prolonged +
lanose-floccose +
glabrate +  and lanose-floccose +
1 (?) +  and Anatomy (?) +
4 +  and 12 +
1 (?) +  and 3 (?) +
triangular +  and dome--shaped +
2 (?) +  and 3 (?) +
Gramineae +
Aristida lanosa +
Aristida +
species +
membranous +
0.84 cm8.4 mm <br />0.0084 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
plant +  and cespitose +
aquatic +  and terrestrial +