Jepson Flora Project: Jepson Interchange    

Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California




Reed C. Rollins, except as specified

Annual to subshrub
Inflorescence: generally raceme
Seeds 1–many per chamber
Family description, key to genera by Robert A. Price.



Roy E. Buck, Dean W. Taylor, and Arthur R. Kruckeberg

Annual to perennial herb, glabrous to bristly, generally ± glaucous
Leaves ± entire to pinnately compound; basal generally rosetted, generally ± petioled; cauline linear to (ob)ovate, often clasping
Inflorescence generally ± open; bracts generally 0
Flower biradial or bilateral; calyx generally ± urn-shaped, sepals erect, generally not green, bases ± pouch-like, generally keeled; petals generally exserted, blade generally narrower than claw, ± channeled, margins ± wavy, generally ± scarious; stamens generally in 3 free pairs; style 0 or short, stigma generally ± entire, blunt
Fruit long, generally strongly compressed parallel to septum
Seeds generally compressed, generally ± winged
Species in genus: ± 40 species: sw US, n Mex
Etymology: (Greek: twisted flower, from wavy-margined petals)
Reference: [Dolan & LaPré 1989 Madroño 36:33–40; Kruckeberg & Morrison 1983 Madroño 30:230–244]
Caulanthus sometimes including here. Calluses on leaf margins of some mimic pierid butterfly eggs, reducing larval herbivory. Variable, complex; needs study.


S. cordatus Nutt.

Perennial 2–10 dm, generally simple, glabrous
Leaves: basal widely obovate, toothed above middle, teeth often bristly, petioles = leaves, often ciliate; cauline few-toothed to entire, generally acute
Flower: calyx biradial, sepals 8–13 mm, yellowish green in bud becoming purple in flower, tips generally bristly; petals exserted, 10–14 mm, linear, purple; stamens free, equal; stigma 2-lobed
Fruit ascending to ± erect, 5–10 cm, 2.5–6 mm wide, straight
Chromosomes: n=12
Ecology: Rocky or sandy sagebrush scrub, pinyon/juniper woodland, ponderosa-pine forest
Elevation: 1200–3100 m.
Bioregional distribution: e High Cascade Range, s High Sierra Nevada, Great Basin Floristic Province, Desert Mountains
Distribution outside California: to se Oregon, Wyoming, n New Mexico

previous taxon | next taxon
bioregional map for STREPTANTHUS%20cordatus being generated

Retrieve Jepson Interchange Index to Plant Names entry for Streptanthus cordatus
Retrieve dichotomous key for Streptanthus
Overlay Consortium of California Herbaria specimen data by county on this map
Return to the Jepson Interchange main page
Return to treatment index page

University & Jepson Herbaria Home Page |
General Information | University Herbarium | Jepson Herbarium |
Visiting the Herbaria | On-line Resources | Research |
Education | Related Sites
Copyright © by the Regents of the University of California