Regularity: Regularly occurring
Global Range: CA (Sonoran Desert), AZ; Mexico.
Catalog Number: US 24440
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): A. C. V. Schott
Locality: Near Fort Yuma, Sonora, Mexico, North America
- Possible type: Torrey, J. 1859. Rep. U.S. Mex. Bound. Surv. 2 (1): 53.
Comments: Slopes, benches, washes; 0-600 m.
National NatureServe Conservation Status
Rounded National Status Rank: N3 - Vulnerable
Psorothamnus schottii is a species of flowering plant in the legume family known by the common name Schott's dalea. It is native to the Sonoran Deserts of northern Mexico and adjacent sections of Arizona and the Colorado Desert in California.
Psorothamnus schottii is a shrub approaching two meters in maximum height. Its highly branching stems are green to woolly gray-green and glandular. The gland-pitted linear leaves are up to 3 centimeters long and not divided into leaflets.
The inflorescence is an open raceme of up to 15 flowers. Each flower has a deep purple blue pealike corolla up to a centimeter long in a glandular tubular calyx of sepals with pointed lobes. The fruit is a legume pod coated in glands and containing one seed.
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