Panicum antidotale
Panicum verrucosum
blue panic, blue panic grass, blue panicum
warty panicgrass
50-300 cm tall, 2-4 mm thick, often compressed, erect or ascending, hard, becoming almost woody;
nodes swollen, glabrous or pubescent;
internodes glabrous, glaucous.
10-150 cm, slender, wiry, erect at first, ultimately decumbent, sprawling, glabrous, often with purple dots and streaks, branching extensively at the base, rooting at the lower nodes.
not keeled, shorter than or equal to the internodes, glabrous or the lower sheaths at least partially pubescent, hairs papillose-based;
ligules 0.3-1.5 mm;
blades 10-60 cm long, 3-20 mm wide, elongate, flat, abaxial surfaces and margins scabrous, adaxial surfaces occasionally pubescent near the base, with prominent, white midveins, bases rounded to narrowed.
often shorter than the internodes, loose, glabrous, margins short-ciliate;
ligules 0.2-0.5 mm, membranous, erose, ciliate;
blades 5-20 cm long, 3-10 mm wide, thin, flat, glabrous on both surfaces, margins scabridulous, apices long-acuminate.
10-45 cm, to 1/2 as wide as long, open or somewhat contracted, with many spikelets;
branches 4-12 cm, opposite or alternate, ascending to spreading;
pedicels 0.3-2.5 mm, scabridulous to scabrous, appressed to diverging less than 45° from the branch axes.
5-30 cm, nearly as wide as long;
branches few, capillary, with a few spikelets distally;
pedicels 0.5-10 mm.
2.4-3.4 mm long, 1-1.3 mm wide, ellipsoid-lanceoloid to narrowly ovoid, often purplish, glabrous, acute.
1.7-2.2 mm long, about 1 mm wide, ellipsoid or obovoid, glabrous, faintly veined, subacute or obtuse at the apices.
1.4-2.2 mm, 1/3 – 1/2 as long as the spikelets, 3-5-veined, obtuse;
upper glumes and lower lemmas subequal, glabrous, 5-9-veined, margins scarious, acute;
lower florets staminate;
upper florets 1.8-2.8 mm long, 0.9-1.1 mm wide, smooth, lustrous, acute.
0.3-0.8 mm, reduced, acute;
upper glumes and lower lemmas subequal or the glumes shorter, distinctly verrucose, with hemispheric warts;
upper florets 1.6-2 mm long, about 1 mm wide, grayish-brown, dull, minutely papillose, acute.
= 18, 36.
= 36.
Panicum antidotale
Panicum verrucosum
Panicum antidotale is native to India. It is grown in the Flora region as a forage grass, primarily in the southwestern United States. It is now established in the region, being found in open, disturbed areas and fields.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Panicum verrucosum grows primarily in open, moist or wet sandy areas bordering swamps, marshes, or lakes or on roadside ditches; it also grows occasionally in open, drier woodlands. It is restricted to the eastern United States and is mostly, but not exclusively, coastal.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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