Polanisia species

Click on the images below to see larger versions.

Scientific Name Polanisia dodecandra USDA PLANTS Symbol
PODO3
Common Name Clammyweed, Redwhisker Clammyweed ITIS Taxonomic Serial No.
22652
Family Cleomaceae (Cleome) SEINet Reference
Click Here
Description Habitat: Sandy or gravelly soils; disturbed areas, open areas, roadsides, streambanks.
Plant: Upright slender or bushy annual 1 to 3 feet tall, much-branched; covered with sticky, glandular hairs.
Leaves: Trifoliate with oblanceolate to obovate or broadly elliptic leaflets; becoming single, petiolate, along stems near the flower head; 3/8 to 1-5/8 inches long.
Inflorescence: Dense racemes 2 to 8 inches across of 15 to 30 flowers with 4 white petals up to 3/8-inch long; 6 to 20 pink to purple stamens, 3/8 to 1-1/4 inches long, much longer than the petals.
Fruit: Erect capsules 1 to 3 inches long with dull reddish to dark brown seeds inside.
Bloom Period: May to June.
References: "Wildflowers of the Texas Hill Country" by Marshall Enquist, "Manual of the Vascular Plants of Texas" by Correll and Johnston and SEINet.
Notes: Appears similar to the less common Polanisia uniglandulosa below. P. dodecandra has smaller flowers and fewer but longer stamens, and the seeds are not shiny.
Texas Status
Native
Scientific Name Polanisia uniglandulosa USDA PLANTS Symbol
POUN3
Common Name Mexican Clammyweed ITIS Taxonomic Serial No.
22661
Family Cleomaceae (Cleome) SEINet Reference
Click Here
Description Habitat: Sandy or gravelly areas in arroyos, riverbeds, roadsides, and pastures.
Plant: Erect annual 8 to 32 inches tall, much-branched; stems and leaves covered with sticky, glandular hairs.
Leaves: Alternate, petiolate, trifoliate with broadly elliptic to oblanceolate leaflets; becoming single along stems near the flower head; 3/4 to 1-5/8 inches long.
Inflorescence: Dense racemes 2 to 8 inches across of 15 to 30 flowers with 4 white petals; 20 to 27 pink to purple stamens 3/4 to 2 inches long, much longer than the petals.
Fruit: Erect capsules 2-3/8 to 4 inches long with dark reddish brown, smooth shiny seeds inside.
Bloom Period: May to October.
References: "Manual of the Vascular Plants of Texas" by Correll and Johnston and SEINet.
Notes: See note above re: P. dodecandra
Texas Status
Native

© Tom Lebsack 2018