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.[2]: 121 

Astragalus preussii

Apparently Secure  (NatureServe)[1]
Scientific 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.[2]: 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.[2]: 121 

Inflorescence and fruit

It blooms from March to June.[2]: 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.[2]: 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.[2]: 121 

Habitat and range

It only grows in soils containing Selenium.[2]: 121 

Ecological and human interactions

It is named after Charles Preuss.[2]: 121 

References
  1. NatureServe (2024). "Astragalus preussii". Arlington, Virginia. Retrieved 27 April 2024.
  2. 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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