An Illustrated Guide to ARIZONA WEEDS

The University of Arizona Press




NARROWLEAF GOOSEFOOT-Chenopodium desiccatum A. Nels. (C. pratericola Rydb.)

DESCRIPTION-A stout grayish annual, 1 to 4 feet high, which usually branches well above the base, and reproduces only by seeds. The lanceshaped or oblong pointed leaves are short stalked, densely whitish, mealy on the lower surface and greener above, 1/2 to 1 1/2 or 2 inches long, 1/12 to 1/3 inch broad, with both large and small leaves occurring together. The leaves may be l-veined with smooth edges, or 3-veined at the base with 2 indistinct, or short but obvious lobes, 1 on either side toward the base.

The small stalkless flowers, also densely covered by whitish mealy scales, are crowded on short branches in the upper leaf axils, and in long, leafless flowering branches at the top of the plant. The black, shiny diskshaped seed, about 1/25 inch in diameter, drops out of the thin, papery covering when mature.

DISTRIBUTION-This native goosefoot grows in moist or dryish alkaline or disturbed soil. A common weed throughout most of Arizona, and a pest in field crops in the southern part of the state, also found in irrigation ditches, waste places, river flats, and roadsides; 100 to 8,500 feet elevation; flowering May to September.

SLIMLEAF GOOSEFOOT-Chenopodium leptophyllum Nutt.

DESCRIPTION-An annual, closely resembling narrowleaf goosefoot, and often confused with it. Differing in that the leaves are narrow, 1-veined, with smooth margins. The seed is permanently enclosed in the thin colorless covering, and thus the surface is dull, not shiny.

DISTRIBUTION-Slimleaf goosefoot is also a native weed, found principally in northern and central Arizona, along roadsides, washes, waste places, and also in barren areas in pinyon-juniper, and yellow pine ranges in Apache, Navajo, Coconino, Yavapai, and Pinal counties; 2,500 to 8,500 feet elevation; flowering August to September.

Copyright (c) 1972 The Arizona Board of Regents

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