Astragalus preussii

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.[1]: 121 

Astragalus preussii
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Subfamily: Faboideae
Genus: Astragalus
Species:
A. preussii
Binomial name
Astragalus preussii

Description

Growth pattern

It is an annual or perennial plant from 4 to 15 inches (10 to 38 cm) tall, growing upright from a woody base.[1]: 121 

Leaves and stems

It has compound pinnate leaves from 1+1⁄2 to 15 inches (3.8 to 38.1 cm) long, with 7-25 3⁄4 inch (1.9 cm), elliptic leaflets.[1]: 121 

Inflorescence and fruit

It blooms from March to June.[1]: 121  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, 3⁄4 inch (1.9 cm) long.[1]: 121  When dried, 3⁄4 inch (1.9 cm) seed pods are papery or leathery, elliptical, and are either smooth or covered with soft hairs.[1]: 121 

Habitat and range

It only grows in soils containing Selenium.[1]: 121 

Ecological and human interactions

It is named after Charles Preuss.[1]: 121 

References
  1. Canyon Country Wildflowers, Damian Fagan, 2nd ed., 2012, Morris Bush Publishing, LLC. in cooperation with Canyonlands Natural History Association, ISBN 978-0-7627-7013-7
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