Acrachne racemosa

(B. Heyne ex Roem. & Schult.)
Treatment appears in FNA Volume 25. Treatment on page 112.

Culms 17-50 cm. Blades 7-20 cm long, 5-11.5 mm wide, bases rounded, setaceous apically. Influorescence branches 1.5-10 cm, in whorls of 2-5, either subdigitate or on rachises up to 15 cm long. Spikelets 5.5-13 mm, oblong, serrate in outline, with 6-25 florets. Lower glumes 1.2-2.9 mm, linear-oblong, acute, mucronate; upper glumes 1.5-3 mm, lanceolate, acuminate, awn-tipped; lemmas 2-2.8 mm, narrowly ovate, keels scabrous, shallowly concave distally, midveins excurrent, forming stout, 0.3-0.9 mm awns; lateral-veins also slightly excurrent. Fruits ellipsoid; seeds blackish, rugose, finely granular. 2n = 36.

Discussion

Acrachne racemose grows in areas of seasonal rainfall in tropical regions of Africa, Asia, and Australia. It has been found in Riverside County, California and may become established there.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Acrachne racemosa"
1 +  and 3 +
Sylvia M. Phillips +
(B. Heyne ex Roem. & Schult.) +
1 (?) +  and 3 (?) +
multiple +, , +  and single +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
flattened +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
setaceous +  and rounded +
swelling +
membranous +
not pseudopetiolate +
7 cm70 mm <br />0.07 m <br /> (20 cm200 mm <br />0.2 m <br />) +
pubescent +  and glabrous +
usually linear +  and lanceolate occasionally ovate +
5mm;11.5mm +
on rachises +  and subdigitate +
spikelike +
triangular +  and dome--shaped +
sometimes longer +
membranous +
geniculate +
17 cm170 mm <br />0.17 m <br /> (50 cm500 mm <br />0.5 m <br />) +
not woody +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
6 +  and 25 +
bisexual +  and fertile +
round +  and compressed +
reduced +
ellipsoid +
shorter or longer +
subtending +
uncinate +
paniculate +  and racemose +
hollow +  and solid +
not absent +
awn-tipped +, cuspidate +  and 3-veined +
0.2 cm2 mm <br />0.002 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
membranous to cartilaginous +  and membranous +
sometimes longer +
membranous +
inconspicuous +
mucronate +, acute +  and linear-oblong +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.29 cm2.9 mm <br />0.0029 m <br />) +
concealed +  and prominent +
2 +  and 1 +
persistent +
dry +  and fleshy +
spikelike +
0 cm0 mm <br />0 m <br /> (15 cm150 mm <br />0.15 m <br />) +
elongate +
in part +  and falling +
1 +  and 60 +
0.55 cm5.5 mm <br />0.0055 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
1 (?) +  and 3 (?) +
compound +  and simple +
2 (?) +  and 3 (?) +
Gramineae +
Acrachne racemosa +
Acrachne +
species +
membranous +
acuminate +  and lanceolate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
7 +  and 13 +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +