Polanisia uniglandulosa
(Mexican Clammyweed)
Polanisia uniglandulosa, River Road West, Big Bend National Park 2379
Polanisia uniglandulosa, River Road West, Big Bend National Park 0486
Polanisia uniglandulosa, River Road West, Big Bend National Park 0509
Polanisia uniglandulosa, River Road West, Big Bend National Park 0507
| Scientific Name | Polanisia uniglandulosa | USDA PLANTS Symbol | POUN3 |
| Common Name | Mexican Clammyweed | ITIS Taxonomic Serial No. | 22661 |
| Family | Cleomaceae (Cleome) | SEINet Reference |
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| 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. Note: Appears similar to the more common Polanisia dodecandra. P. uniglandulosa has larger flowers and more but shorter stamens, and the seeds are shiny. |
BONAP Distribution Map Map Color Key |
Texas Status: Native |
Banner photo of Castilleja indivisa and Lupinus ssp. taken along FM 1323 north of Johnson City, Blanco County
© Tom Lebsack 2024