Sphenopholis obtusata

prairie wedgescale, prairie wedgegrass, wedge-grass, wedgegrass
Family

Poaceae

Leaf Arrangement

alternate

Leaf Attachment

sheathing

Leaf Margin

entire

Leaf Type

simple

Leaf Shape

linear

Growth Form

graminoid

Flower Color

inconspicuous

Flower Month

March - August

Height (meters)

0.1 - 1.3

Milky Sap

No

Armed/Unarmed

Unarmed

Origin

native

Lifespan

annual, perennial

Growing Season

Cool season


Wetland Class

FAC

Prairie Coefficient of Conservatism

3

Field Characters

Narrow spike with silvery sheen due to silver stripes on florets. Ligule – transparent or opaque auricles.

Cultural Information

Seeds may be planted fresh or stored and planted in the fall. Seed germination of stored seed is improved by cold/dry stratification (Steffen 1979).

Animal Use

Considered of poor forage value.

Natural History

Found frequently along the edges of forest, moist prairies, and disturbed areas of Louisiana and east Texas. Reportedly prefers partial shade and sandy or sandy loam soils. It ranges over most of the United States. Thomas and Allen (1993) consider those plants found in Louisiana to be Sphenopholis obtusata var. obtusata. Because the PLANTS database (USDA 1998) has no listing for this variety, and consequently no symbol for it, we treat it as Sphenopholis obtusata. The range map given is for Sphenopholis obtusata var. obtusata.

Habitat

Moist swales, moist meadows, stream banks. Marsh, damp woods or prairies.