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The Collaborative International Dictionary
Aristida oligantha

Ant \Ant\, n. [OE. ante, amete, emete, AS. [ae]mete akin to G. ameise. Cf. Emmet.] (Zo["o]l.) A hymenopterous insect of the Linn[ae]an genus Formica, which is now made a family of several genera; an emmet; a pismire.

Note: Among ants, as among bees, there are neuter or working ants, besides the males and females; the former are without wings. Ants live together in swarms, usually raising hillocks of earth, variously chambered within, where they maintain a perfect system of order, store their provisions, and nurture their young. There are many species, with diverse habits, as agricultural ants, carpenter ants, honey ants, foraging ants, amazon ants, etc. The white ants or Termites belong to the Neuroptera.

Ant bird (Zo["o]l.), one of a very extensive group of South American birds ( Formicariid[ae]), which live on ants. The family includes many species, some of which are called ant shrikes, ant thrushes, and ant wrens.

Ant rice (Bot.), a species of grass ( Aristida oligantha) cultivated by the agricultural ants of Texas for the sake of its seed. [1913 Webster] ||

Wikipedia
Aristida oligantha

Aristida oligantha is a species of grass known by the common names prairie threeawn and oldfield threeawn.

It is native to the United States and southern Canada, and it is known from northern Mexico. It is a grass of many types of habitat, and it grows easily in dry areas with sandy or gravelly soils. It appears in disturbed and burned areas and is sometimes a weed of roadsides and railroads.

This is an annual forming clumps of branching gray-green and purple-tinted stems about 30 to 70 centimeters tall. The inflorescence is an open array of spikelets. The grain has three spreading awns, the central one reaching up to 7 centimeters long and the other two slightly shorter.