''Digitaria cognata'' is a species of

grass Poaceae () or Gramineae () is a large and nearly ubiquitous family of monocotyledonous flowering plants commonly known as grasses. It includes the cereal grasses, bamboos and the grasses of natural grassland and species cultivated in lawns an ...

known by the common names fall witchgrass,''Digitaria cognata''.
USDA Plants Profile. Carolina crabgrass,''Digitaria cognata''.
USDA NRCS Plant Fact Sheet. and mountain hairgrass.''Digitaria cognata''.
NatureServe.

Description

This grass is a perennial without

rhizome In botany and dendrology, a rhizome (; , ) is a modified subterranean plant stem that sends out roots and shoots from its nodes. Rhizomes are also called creeping rootstalks or just rootstalks. Rhizomes develop from axillary buds and grow hori ...

s. The roots are shallow. The erect stems grow up to 56 centimeters tall. The stem bases are tough and hairy. The leaves are up to 12.6 centimeters long.''Digitaria cognata''.
Grass Manual Treatment. They are narrow, with "one side wavy, and the other smooth". The

inflorescence An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed o ...

is a purple-tinged

panicle A panicle is a much-branched inflorescence. (softcover ). Some authors distinguish it from a compound spike inflorescence, by requiring that the flowers (and fruit) be pedicellate (having a single stem per flower). The branches of a panicle are of ...

with single-flowered spikelets.

Uses

This grass provides graze for livestock and wild

ungulate Ungulates ( ) are members of the diverse clade Ungulata which primarily consists of large mammals with hooves. These include odd-toed ungulates such as horses, rhinoceroses, and tapirs; and even-toed ungulates such as cattle, pigs, giraffes, cam ...

s, and birds eat the seeds.

References

External links

USDA Plants Profile for ''Digitaria cognata'' (fall witchgrass)
{{Taxonbar, from=Q5276225 cognata Bunchgrasses of North America Grasses of Canada Grasses of the United States Flora of the Eastern United States Warm-season grasses of North America