Carnegiea gigantea, Giant Saguaro

Southwest Desert Flora

Home to the plants of the Sonoran, Chihuahuan and Mojave Deserts

Cirsium ochrocentrum, Yellowspine Thistle

Tetrapteron palmeri, Palmer Evening Primrose

Palmer Evening Primrose has small but showy yellow flowers, often nodding on the flowering stalk. Tetrapteron palmeri Palmer Evening Primrose is a native annual that may grow up to 8 inches more or less. Green leaves are basal and cauline; cauline leaves are and alternate. Tetrapteron palmeri Palmer Evening Primrose is a forb or herb with a few strigose hairs, plants often spreading. Tetrapteron palmeri Palmer Evening Primrose is found in the western United States in CA, ID, NV, OR. The species found in California species occur in desert flats. Tetrapteron palmeri

Scientific Name: Tetrapteron palmeri
Common Name: Palmer Evening Primrose
Also Called:
Family: Onagraceae, Evening Primrose Family
Synonyms: (Camissonia palmeri, Oenothera palmeri
Status: Native
Duration: Annual,
Size: Up to 8 inches more or less.
Growth Form: Forb/herb; plants strigose (few hairs) spreading
Leaves: Green; alternate; leaves both basal and cauline; narrowly oblanceolate, minutely serrate.
Flower Color: Yellow; flowers nodding; fruit a 4-angled capsule.
Flowering Season: April to May
Elevation: 1,800 to 4,000 feet.
Habitat Preferences: Desert flats, sagebrush scrub.
Recorded Range: Tetrapteron palmeri is found in the United States in CA, ID, NV, OR. California species occur in desert flats.

North America & US County Distribution Map for Tetrapteron palmeri (as Camissonia palmeri).

U.S. Weed Information: No information available.
Invasive/Noxious Weed Information: No information available.
Wetland Indicator: No information available.
Threatened/Endangered Information: No information available.

Genus Information: In North America, the USDA, Natural Resources Conservation Service includes Tetrapteron palmeri within the genus Camissonia. The synonym Camissonia is found in the west half of North America. The Plant List includes 16 accepted species for Chylismia. The synonym Camissonia is found in the west half of North America. All data is approximate and subject to taxonomic changes.

In the southwestern United States; Arizona has 22 species of Camassonia, California has 43 species, Nevada has 29 species, New Mexico has 6 species, Texas has 1 species and Utah has 19 species. All data is approximate and subject to taxonomic changes.

Comments: Tetrapteron palmeri is included in Southwest Desert Flora because of its California desert scrub locations.

In Southwest Desert Flora also see Miniature Suncup, Camissonia micrantha, Yellow Cups, Chylismia (=Camissonia) brevipes California Suncup, Browneyes, Chylismia (=Camissonia) claviformis and California Suncup, Eulobus californicus.

Date Profile Completed: 02/21/2017
References:
U.S. Dept. of Agriculture, Natural Resources Conservation Service on-line database and USGS ITIS search, Camissonia palmeri - (accessed 02/20/2017)
The Plant List (2013). Version 1.1. Published on the Internet; http://www.theplantlist.org/ (accessed 12/28/2015).
http://www.theplantlist.org/1.1/browse/A/Onagraceae/Camissonia/
http://www.theplantlist.org/1.1/browse/A/Onagraceae/Camissoniopsis/#statistics
http://www.theplantlist.org/1.1/browse/A/Onagraceae/Chylismia/
The Jepson Desert Manual; 2002; Baldwin, Bruce G., et. al.; The Jepson Desert Manual: Vascular Plants of Southeastern California; page 389, Univ. of California Press, Berkeley and Los Angeles, California
1993, The Jepson Manual, Citation: http://ucjeps.berkeley.edu/interchange/I_treat_indexes.html (accessed (accessed 06/12/2016).)
http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?5263,5264,5323
SEINet synonyms, scientific names, geographic locations, general information - (accessed 02/21/2017).
http://swbiodiversity.org/seinet/