''Aristida adscensionis'' 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 name sixweeks threeawn. It is native to the Americas but it is distributed nearly worldwide. It grows easily in disturbed and waste areas and has potential to become a weed.

Description

This annual

bunchgrass Tussock grasses or bunch grasses are a group of grass species in the family Poaceae. They usually grow as singular plants in clumps, tufts, hummocks, or bunches, rather than forming a sod or lawn, in meadows, grasslands, and prairies. As perennial ...

is quite variable in appearance, its size and shape determined largely by environmental conditions. It grows in a tuft to heights between 5 and 80 centimeters. It forms a narrow

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 ...

of spikelets, each fruit with three awns.

External links

Jepson Manual Treatment

USDA Plants Profile

Grass Manual Treatment

adscensionis Bunchgrasses of North America Native grasses of California Flora of the California desert regions North American desert flora Grasses of the United States Flora of the Southwestern United States Plants described in 1753 Taxa named by Carl Linnaeus Flora without expected TNC conservation status {{Poaceae-stub