Aristida condensata

Chapm.
Common names: Big threeawn
Endemic
Treatment appears in FNA Volume 25. Treatment on page 340.
Revision as of 02:55, 30 July 2020 by imported>Volume Importer
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Plants perennial; bases knotty, bleached, not rhizomatous. Culms 70-150 cm tall, 3-6 mm thick at the base, erect, rarely branched. Leaves mostly cauline; sheaths usually longer than the internodes, remaining intact at maturity, glabrous or appressed pilose; collars glabrous or pilose at the sides; ligules less than 0.5 mm; blades (10) 15-30 cm long, 1.5-3 mm wide, flat at the base, involute toward the apex, straight to somewhat lax at maturity, glabrous abaxially, yellowish-green when fresh, drying stramineous or darker. Inflorescences paniculate, (15) 20-55 cm long, 2-4 cm wide; nodes glabrous or with short, straight hairs; primary branches (4) 5-20 cm, appressed to narrowly ascending, without axillary pulvini, naked below, with 5-15 overlapping spikelets distally. Glumes 6-10 (12) mm, 1-veined, 1-keeled, awns less than 4 mm, brownish; lower glumes from 3/4 as long as to 1 mm longer than the upper glumes; calluses 1-2 mm; lemmas 5-8 mm, often reddish-mottled, apices not strongly twisted, junction with the awns not evident; awns about equally thick, divergent, spirally contorted at the base but usually not with distinct coils, not disarticulating at maturity; central awns 10-15 mm; lateral awns 8-13 mm; anthers 3, about 2 mm. Caryopses 4-5 mm, chestnut-colored. 2n = unknown.

Distribution

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

Discussion

Aristida condensata grows on sandy hills, and in pine and oak barrens in the southeastern United States.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Aristida condensata"
2 cm20 mm <br />0.02 m <br /> (?) +
Kelly W. Allred +
Chapm. +
not disarticulating +
1 (?) +  and 3 (?) +
straight +
ascending +  and spreading +
not evident +
0 cm0 mm <br />0 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
keeled +  and rounded +
not rhizomatous +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
straight +
yellowish-green +
darker +, stramineous +  and drying +
straight +
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +
usually linear +  and lanceolate occasionally ovate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
spikelike +
well-developed +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
chestnut-colored +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
non-radiate +  and radiate +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
distinct +
pilose +  and glabrous +
Big threeawn +
70 cm700 mm <br />0.7 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
10 cm100 mm <br />0.1 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
not woody +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Ga. +, N.C. +, Ala. +, S.C. +, Miss. +  and Fla. +
large +  and small +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
subtending +
1-keeled +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
straight +
20 cm200 mm <br />0.2 m <br /> (?) +  and 55 cm550 mm <br />0.55 m <br /> (?) +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
reddish-mottled +
scabridulous +
fusiform +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
coriaceous +
indistinguishable +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
inconspicuous +
concealed +  and prominent +
with short , straight hairs +  and glabrous +
2 +  and 1 +
concealing +
0 +  and 1/2 +
dry +  and fleshy +
divaricate +  and divergent +
4 cm40 mm <br />0.04 m <br /> (?) +
appressed;narrowly ascending +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
not prolonged +
usually longer +
pilose +, appressed +  and glabrous +
1 (?) +  and Anatomy (?) +
5 +  and 15 +
1 +  and 3 +
triangular +  and dome--shaped +
2 (?) +  and 3 (?) +
Gramineae +
Aristida condensata +
Aristida +
species +
membranous +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
aquatic +  and terrestrial +