Panicum rigidulum var. rigidulum

redtop panicgrass


Growth Form


Flower Month

July - September

Height (meters)

0.5 - 1.0

Milky Sap








Growing Season

Warm season

Wetland Class


Prairie Coefficient of Conservatism


Cultural Information

Seed germination for most members of the panicum is improved by cold/moist stratification, although many may be planted fresh (Steffen 1997).

Animal Use

This information is for the genera Panicum and Dicanthelium with note that, because of abundance and distribution, it is one of the country's most important food sources for ground-feeding songbirds and gamebirds. It is also valuable as livestock forage: Animals that eat its seeds: Purple gallinule, Sora rail, Pectoral sandpiper, Ground dove, Mourning dove, Eastern white-winged dove, Bobwhite quail, Wild turkey, Woodcock, Redwing blackbird, Painted bunting, Cardinal, Cowbird, Brown creeper, Dickcissel, Blue grosbeak, Junco, Meadowlark, American and sprague pipit, Pyrrhuloxia, Chipping, vesper and white-throated sparrows, Pine-woods and tree sparrow, English, Harris, Henslow, Ipswich and sharp-tailed sparrows, Field, grasshopper, song, swamp and white-crowned sparrows, Savannah sparrow, Towhee, Pine warbler. Animals that eat the young plants and its seed: Baldpate and blue-winged teal, Florida and green-winged teal, Gadwall duck, Blue and canada goose, Snow goose, White-fronted goose. Animals that eat the plants: Antelope, White-tailed deer (Martin et al. 1951).

Natural History

The seeds of many Panicums were used as food in the Southwest, however, their importance as a food source was limited because they drop their seeds quickly after ripening (Doebley 1983). Found frequently in moist areas throughout Louisiana. Ranges throughout eastern United States to Kansas and Texas.


Abundant in moist or poorly drained areas.