Carnegiea gigantea, Giant Saguaro

Southwest Desert Flora

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

Cirsium ochrocentrum, Yellowspine Thistle

Senna bauhinioides, Twinleaf Senna

Senna bauhinioides, Twinleaf Senna Senna bauhinioides, Twinleaf Senna Senna bauhinioides, Twinleaf Senna Senna bauhinioides, Twinleaf SennaSenna bauhinioides, Twinleaf Senna

Scientific Name: Senna bauhinioides
Common Name: Twinleaf Senna
Also Called:
Family: Fabaceae or Leguminosae Family
Synonyms: (Cassia bauhinioides, Cassia bauhinioides var. arizonica)
Status: Native
Duration: Perennial
Size: Low growing up to 20 inches or more.
Growth Form: Forb/herb, subshrub;
Leaves: Green, grayish-green; compound-like with 2 leaflets, a major difference from Senna covesii
Flower Color: Yellow; flowers in cluster of 1 to 3, short flowering stalk, fruit a legume.
Flowering Season: April to August.
Elevation: 2,000 to 5,000 feet.

Habitat Preferences: Dry rocky slopes and mesas.

Recorded Range: In the United States, Twinleaf Senna is found in Arizona, New Mexico and Texas. In Arizona is occurs in the western and southeastern parts of the state, the south half of New Mexico and western Texas south of New Mexico and mostly east of the Rio Grande River and further south. It is also native to northern and northeast Mexico in Chihuahua, Coahuila, Durango, Sonora and Tamaulipas.

North America & US County Distribution Map for Senna bauhinioides.

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: 59 species in Senna throughout most of the eastern half and southern half of the United States and in Ontario, Canada. 9 species in Arizona, 8 species in California. Several members of the genus Senna have been re-classified from Cassia.

The Plant List includes 1,225 scientific plant names of species rank for the genus Senna. Of these 272 are accepted species names.

Comments: The type species of Cassia bauhinioides var. arizonica was collected from the Mule Mountains, Cochise County, Arizona.

Twinleaf Cassia and Coves' Cassia generally occupy the same habitat although Coves' Cassia is much more common at lower elevations. Also, Twinleaf Senna will be observed blooming much later in the year, especially following a heavy monsoon.

Also see in Southwest Desert Flora; Coves' Cassia, Senna covesii, Woolly Senna, Senna hirsuta v glaberrima and Baja California Senna, Senna purpusii.

Date Profile Completed: 09/08/2015, updated, 09/14/2015, updated format 10/12/2017
U.S. Dept. of Agriculture, Natural Resources Conservation Service on-line database and USGS ITIS search
Arizona Flora, Kearney, Thomas H., Peebles, Robert H., 1960, University of California Press, Berkley and Los Angeles, California, as Cassia bauhinioides.
Native Plant Information Network, NPIN (2013). Published on the Internet [accessed: 09/08/2015]. Lady Bird Johnson Wildflower Center at The University of Texas, Austin, TX.
SEINet for synonyms, scientific names, recorded geographic locations and general information
The Plant List (2013). Version 1.1. Published on the Internet; (accessed 09/08/2015 ).