Leptochloa panicea subsp. brachiata

(Steud.) N. Snow
Common names: Red sprangletop
Synonyms: Leptochloa filiformis
Treatment appears in FNA Volume 25. Treatment on page 58.

Culms to 150 cm. Ligules 0.9-3.2 mm; blades 2-21 mm wide. Glumes usually not exceeding the florets, lanceolate to narrowly elliptic; lemmas 1.3-1.7 mm, shortly sericeous along the veins. Caryopses 0.9-1.2 mm, widely depressed obovate or obdeltate in cross-section, usually with a narrow, shallow ventral groove, apices broadly obtuse to acute. 2n = 20.

Discussion

Leptochloa panicea subsp. brachiata extends from the southern half of the United States to Argentina. It is common in disturbed and mesic agricultural sites, and is considered a noxious weed by the U.S. Department of Agriculture.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
bilobed +  and entire +
broadly obtuse +  and acute +
Neil Snow +
(Steud.) N. Snow +
1 (?) +  and 3 (?) +
multiple +, , +  and single +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
6 cm60 mm <br />0.06 m <br /> (25 cm250 mm <br />0.25 m <br />) +
pilose +  and glabrous +
usually linear +  and lanceolate occasionally ovate +
0.2 cm2 mm <br />0.002 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
subdigitate +, digitate +  and non-disarticulating +
ascending;reflexed +
spikelike +
1 cm10 mm <br />0.01 m <br /> (19 cm190 mm <br />0.19 m <br />) +
pubescent +  and glabrous +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
obdeltate +, obovate +  and depressed +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Red sprangletop +
compressed +
0 cm0 mm <br />0 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
not woody +
Ark. +, Miss. +, Tenn. +, Fla. +, Puerto Rico +, N.J. +, Ala. +, Ariz. +, Calif. +, Ga. +, Ill. +, Kans. +, Ky. +, La. +, Mo. +, N.C. +, N.Mex. +, Okla. +, S.C. +, Tex. +, S.Dak. +, Pa. +, Nev. +, Va. +, Colo. +, Virgin Islands +, Ind. +, Mass. +, Ohio +  and Utah +
not waisted +
capillary +
not disarticulating +
sometimes longer +
2 +  and 5 +
round +  and compressed +
reduced +
shorter or longer +
subtending +
lanceolate +  and narrowly elliptic +
subequal +  and unequal +
membranous +
papillose-based +
uncinate +
paniculate +  and racemose +
not absent +
acute +  and obtuse +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
membranous +
sometimes longer +
obtuse +  and attenuate +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
membranous +
inconspicuous +
linear +  and lanceolate +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
concealed +  and prominent +
2 +  and 1 +
sericeous +  and glabrous +
subequal +
membranous +
8 cm80 mm <br />0.08 m <br /> (30 cm300 mm <br />0.3 m <br />) +
dry +  and fleshy +
spikelike +
distant +  and imbricate +
maroon +, magenta +  and green +
1 +  and 60 +
rounded +  and slightly keeled +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
1 +  and 3 +
compound +  and simple +
2 (?) +  and 3 (?) +
Leptochloa filiformis +
Leptochloa panicea subsp. brachiata +
Leptochloa panicea +
subspecies +
membranous +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
7 (?) +  and 13 (?) +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +