Hordeum arizonicum
Encyclopedia
Hordeum arizonicum is a species of wild barley
Hordeum
Hordeum is a genus of about 30 species of annual and perennial grasses, native throughout the temperate Northern Hemisphere, temperate South America, and also South Africa....

 known by the common name Arizona barley. It is native to northern Mexico and the southwestern United States, where it grows in wet spots in desert regions, such as irrigation
Irrigation
Irrigation may be defined as the science of artificial application of water to the land or soil. It is used to assist in the growing of agricultural crops, maintenance of landscapes, and revegetation of disturbed soils in dry areas and during periods of inadequate rainfall...

 ditches. It can grow in somewhat saline soils. This is an annual or perennial grass forming erect tufts 20 to 70 centimeters high. The inflorescence
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. Strictly, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified...

 is a spike up to about 12 centimeters long made up of spikelets up to about 3 centimeters long each, usually tipped with awns.

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