Axonopus compressus
Axonopus fissifolius
broadleaf carpetgrass
carpetgrass, common carpetgrass, Louisiana grass, mat grass, narrowleaf carpetgrass
7-80 cm;
nodes glabrous or pubescent.
10-75 cm, erect or depressed-decumbent;
cauline nodes glabrous or slightly pubescent.
keeled, strongly compressed, pubescent;
ligules 0.3-0.5 mm;
blades 3-20 mm wide, glabrous or sparsely pilose, midveins often white and prominent, apices frequently ciliate or pubescent.
compressed, mostly glabrous, margins ciliate;
ligules 0.2-0.4 mm;
blades 4-15 cm long, 1.5-6 mm wide, flat, mostly glabrous, margins with papillose-based cilia.
terminal and axillary, 4-10 cm overall, rachises to 3.5 cm, with 2-5 branches;
branches 1-13 cm.
terminal and axillary, 5-11 cm overall, rachises to 3 cm, with 2-7 branches;
branches 2-9(12) cm, spreading or ascending.
2-3.5 mm, ovoid, ellipsoid, or lanceoloid, acuminate.
1.6-2.2(2.8) mm, ovoid or ellipsoid, obtuse to acute.
1.2-1.5 mm, gray.
1.5-1.8 mm, gray.
glumes and lower lemmas extending beyond the upper florets, 2-5-veined, marginal veins pilose, apices acute to acuminate;
upper lemmas and paleas 1.5-1.8 mm, broadly ellipsoid.
glumes and lower lemmas scarcely extending beyond the upper florets, 2-veined, margins sparsely pilose, apices obtuse to subacute;
upper lemmas and paleas 1.6-2.1 mm long, 0.5-0.7 mm wide.
= 40, 60, 80.
= 20, 40, 80, 100.
Axonopus compressus
Axonopus fissifolius
Axonopus compressus is native from the southeastern United States to Bolivia, Brazil, and Uruguay, and has become established in the Eastern Hemisphere. It is used as a lawn and forage grass but is also weedy, readily growing in moist, disturbed habitats.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Axonopus fissifolius is sometimes used as a lawn or pasture grass, but it is also an invasive weedy species, often growing in moist, disturbed sites. It is native in the southeastern United States and from central Mexico south to Bolivia and Argentina. It has also been introduced into tropical and subtropical regions of the Eastern Hemisphere.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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