Duration: Perennial Nativity: Native Lifeform: Vine General: Herbaceous perennials, stems prostrate to ascending, plant suffrutescent. Leaves: Alternate, pinnate with 5 leaflets, these not more than 15 mm long. Flowers: Yellow, with banner, wing, and keel petals (papilionaceous), calyx tube pubescent, longer than the triangular teeth, flowers few, axillary, in short racemes or fascicles. Fruits: Loment, turgid, straight, deeply constricted between the seeds, the terminal wing-like segment much smaller than the others. Seeds 2-3. Ecology: Found around 5,000 ft (1524 m); flowering July-August. Distribution: Arizona; Mexico. Notes: Nissolia wislizeni is prostrate to ascending with leaflets up to 15 cm long, with turgid fruits deeply constricted between the seeds and pubescent calyx tubes on the flowers. Nissolia schottii is twining, with leaflets up to 30 cm long, glabrous calyx tubes, and flattened fruits, not or just barely constricted between the seeds. Ethnobotany: There is no use recorded for this species, but other species in this genus have uses. Etymology: The meaning of Nissolia is unknown, while wislizeni is named after Frederick Adolf Wislizenus (1810-1889), Army surgeon, explorer, botanist and plant collector of German birth who travelled extensively in the southwestern United States. Synonyms: Chaetocalyx wislizeni Editor: LCrumbacher 2012
