An Illustrated Guide to ARIZONA WEEDS

The University of Arizona Press

JUNGLERICE, watergrass

Illustration

GRASS FAMILY-Gramineae

JUNGLERICE-Echinochloa colonum (L.) Link.

DESCRIPTION-A spreading annual, 2/3 to 2 or 3 feet high, which reproduces by seeds. Junglerice closely resembles barnyardgrass; the stems are spreading and prostrate, often rooting at the base, then ascending. The first growth form fre- quently is a dense rosette of leaves at the ground level. These and the other leaves often have similar purple bands, but are narrower, 1/4 inch broad or less. Barnyard-grass differs principally in the flowers: the flowering part is shorter, 2 to 6 inches long, and the branches are shorter, 3/8 to 1/4 (or to 1 ) inch long. Also none of the spikelets end in a bristle, but are merely sharp pointed. They are crowded on the stem in 2 to 4 regular rows, rather than being irregularly arranged.

DISTRIBUTION-Junglerice, more widespread than barnyardgrass, is a pest in central and southern Arizona's irrigated lands. Found in such crops as sorghum, cotton, alfalfa, lettuce, and melons. It is also annoying in lawns (where it forms thick basal rosettes), flowerbeds, and gardens; 150 to 5,500 feet elevation: flowering from February to October or November.

Seeds of both junglerice and barnyardgrass are used in Asia and Africa for human food.

Copyright (c) 1972 The Arizona Board of Regents



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