Astragalus preussii (common name - Preuss’ milkvetch) is an annual or perennial plant in the legume family (Fabaceae) found in the Colorado Plateau and Canyonlands region of the southwestern United States.Canyon Country Wildflowers, Damian Fagan, 2nd ed., 2012, Morris Bush Publishing, LLC. in cooperation with Canyonlands Natural History Association,
Description Growth pattern It is an annual or perennial plant from tall, growing upright from a woody base.
Leaves and stems It has compound pinnate leaves from long, with 7-25 , elliptic leaflets.
Inflorescence and fruit It blooms from March to June. The inflorescence has 3-22 flowers per stalk, with a small, green, 5-lobed calyx around a tubular set of white to pink to purple petals, long. When dried, seed pods are papery or leathery, elliptical, and are either smooth or covered with soft hairs.
Habitat and range It only grows in soils containing Selenium.
Ecological and human interactions It is named after Charles Preuss.
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