Setaria parviflora

marsh bristlegrass, knotroot bristlegrass, marsh bristle grass, yellow bristlegrass, knotroot foxtail-grass
Family

Poaceae

Leaf Arrangement

alternate

Leaf Attachment

sheathing

Leaf Type

simple

Leaf Shape

linear

Growth Form

graminoid

Flower Color

inconspicuous

Flower Month

January - December

Height (meters)

0.3 - 1.2

Milky Sap

No

Armed/Unarmed

Unarmed

Origin

native

Lifespan

perennial

Growing Season

Warm season


Wetland Class

FAC

Wetland Coefficient of Conservatism

3

Prairie Coefficient of Conservatism

4

Field Characters

Foliage is usually a glaucous, bluish color that stands out against most other foliage. It does not occur in big clumps but is often common where it is found. It is similar to S. glauca but has rhizomes and narrower leaves. Also, Setaria parviflora is a perennial with elliptic spikelets, usually shorter than 3 mm, with subtending bristles that are never reddish tinged, while Setaria glauca is an annual with broadly elliptic to ovate spikelets, usually 3 mm or longer, with subtending bristles that have a reddish tinge.

Cultural Information

Seeds average approximately 292,000/lb.

Animal Use

This information is for the genus Setaria with note that S. lutescens and S viridis are especially important for wildlife. Setaria grisebachii is valuable to quail and other ground-feeding birds: Animals that eat its seeds: Pintail duck, Blue-winged teal duck, Green-winged teal duck, King rail, Yellow rail, Pectoral sandpiper, Wilson snipe, Ground dove, Mourning dove, Eastern white-winged dove, Greater prairie chicken, Bobwhite quail, Gambel quail, Wild turkey, Woodcock, Redwing blackbird, Bobolink, Indigo bunting, Painted bunting, Cardinal, Cowbird, Dickcissel, Boat-tailed grackle, Purple grackle, Blue grosbeak, Junco, Horned lark, Meadowlark, American pipit, Pyrrhuloxia, Chipping sparrow, Clay-colored sparrow, English sparrow, Field sparrow, Fox sparrow, Harris sparrow, Henslow sparrow, Lark sparrow, Pine-woods sparrow, Savannah sparrow, Seaside sparrow, Song sparrow, Swamp sparrow, Tree sparrow, Vesper sparrow, White-crowned sparrow, White-throated sparrow, Albert towhee. Animals that eat its foliage and seeds: Jack rabbit, Muskrat, Eastern cottontail rabbit, Mearns cottontail rabbit (Martin et al. 1951). Fair forage; good seed producer for wildlife.

Natural History

Found often, but not in great numbers, in disturbed areas such as pastures, and old fields, throughout Louisiana and east Texas. It ranges throughout most of the United States except the northwest states.

Habitat

Moist ground, gardens, salt marshes, along streams and ditches, and waste places.