Imperata brasiliensis

Trin.
Common names: Brazilian bladygrass Brazilian satintail
Introduced
Treatment appears in FNA Volume 25. Treatment on page 621.

Culms 22-98 cm. Ligules 0.5-1.7 mm; blades 3-13 (19) mm wide, linear-lanceolate. Panicles 7.5-14 (17) cm; lower branches 1-3.5 cm, appressed. Callus hairs 7-13 mm; glumes 2.4-4.5 mm; lower lemmas 1-3.4 mm long, 0.5-1.1 mm wide; upper lemmas usually absent, if present, about 1 mm long, 0.3 mm wide; stamens 1, bases of the filaments dilated; anthers 1.4-2.8 mm; styles 1.1-4.7 mm; stigmas 2.4-6.7 mm. 2n = unknown.

Distribution

Puerto Rico, La., Ala., Miss., S.C., Fla.

Discussion

The current range of Imperata brasiliensis includes South America and Central America, Mexico, and Cuba. It is now thought to be established in the south¬eastern United States, although it is considered to be eliminated from Florida (Hall 1978); collections of Imperata made there since 1970 having proved to be I. cylindrica. The two species differ in the number of their stamens and the frequent absence of the lower lemma in I. brasiliensis.

Imperata brasiliensis is listed as a noxious weed by the U.S. Department of Agriculture. Burning stimulates its flowering; consequently many specimens have burned leaves.

Selected References

None.

Lower Taxa

None.

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

... more about "Imperata brasiliensis"
yellow +  and brown +
1 +  and 2 +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
anatomy +  and kranz +
Mark L. Gabel +
1 (?) +  and 3 (?) +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
dilated +
swelling +
pseudopetiolate +
non-radiate +  and radiate +
well-developed +
linear-lanceolate +
reduced +
3mm;13mm +
spikelike +
0.7 cm7 mm <br />0.007 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
light +  and dark-brown +
ovate +  and obovate +
Brazilian bladygrass +  and Brazilian satintail +
purple +  and reddish +
22 cm220 mm <br />0.22 m <br /> (98 cm980 mm <br />0.98 m <br />) +
not woody +
Puerto Rico +, La. +, Ala. +, Miss. +, S.C. +  and Fla. +
capillary +
sometimes longer +
compressed +  and terete +
subtending +
compressed +  and rounded +
subequal +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
membranous +
longer +  and long +
uncinate +
0.7 cm7 mm <br />0.007 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
bracteate +  and ebracteate +
pedunculate +  and multiple-stalked +
1 cm10 mm <br />0.01 m <br /> (7 cm70 mm <br />0.07 m <br />) +
axillary +  and subtending +
cylindrical +  and conical +
solid +  and hollow +
photosynthetic +
not aromatic +
membranous +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
membranous +
inconspicuous +
1 cm10 mm <br />0.01 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
1mm +  and 3.4mm +
0.5mm +  and 1.1mm +
complex +  and simple +
concealed +  and prominent +
3 +  and 4 +
pedicellate +
17 cm170 mm <br />0.17 m <br /> (?) +
7.5 cm75 mm <br />0.075 m <br /> (14 cm140 mm <br />0.14 m <br />) +
not fused +
dry +  and fleshy +
elongate +
Introduced +
in triplets +  and paired +
usually smaller +  and reduced +
purple +  and brown +
elongate +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.67 cm6.7 mm <br />0.0067 m <br />) +
fused +  and free +
free +  and connate +
2 (?) +  and 3 (?) +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.47 cm4.7 mm <br />0.0047 m <br />) +
dome--shaped +  and triangular +
Gramineae +
Imperata brasiliensis +
Imperata +
species +
cuplike +
membranous +
sessile-pedicellate +
1 cm10 mm <br />0.01 m <br /> (?) +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +