Isomeris arborea Nutt.
Peritoma arborea (formerly Isomeris arborea, syn. Cleome isomeris), is a perennial shrub or bush in the Spiderflower Family (Cleomaceae) known by the common names bladderpod, burrofat, and California cleome. It has yellow flowers in bloom all months of the year. It has a foul smelling odor from chemicals it produces to discourage insects from eating it.
Range and habitat
It is commonly found along roadsides, desert dry washes, and flat areas up to 4,000', in the western Mojave Desert and Colorado Desert to Baja California, Mexico. It is native to California and Baja California where it grows in a variety of habitats from coastal bluffs to desert arroyos.
Leaves and stems
Its leaves are made up of three equal leaflets 1/2" to 2" (1-4 cm) long, oval to elliptic in shape and pointed at the tip.
Flowers and fruit
The plant produces abundant inflorescences at the ends of the stem branches all year. Each flowers has four bright yellow petals, four yellow sepals, six whiskery protruding stamens with curling tips holding the anthers.
A typical inflorescence bears a number of unopened flower buds at its tip, open flowers proximal to the buds, and maturing fruits which have shed their flowers below these.
In the previous genus name, "Iso" means "equal", and "meris" means "part", referring to how the pod is divided equally.
- Mojave Desert Wildflowers, Pam MacKay, 2nd Ed. 2013, P. 314
- Mojave Desert Wildflowers, Pam MacKay, 2nd Ed. 2013, p. 230
- Flowering Plants of the Santa Monica Mountains, Nancy Dale, 2nd Ed., 2000, p. 89
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- Jepson Manual Treatment 1993
- Jepson Manual Treatment 2012
- GRIN Species Profile
- USDA Plants Profile
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