Family | Scientific Name | Common Name | Habitat | Distribution | Image |
Cleomaceae | Polanisia dodecandra ssp. dodecandra | Clammyweed, Spiderweed | Sandy or gravelly floodplains and reservoir shores, also introduced on railroad ballast. | VT west to MB, south to MD, w. VA, TN, AR, and OK. | 
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Cleomaceae | Polanisia dodecandra ssp. riograndensis | | Scrub, chaparral, disturbed areas. | S. TX. | |
Cleomaceae | Polanisia dodecandra ssp. trachysperma | | Sandy and gravelly soils of prairies; eastwards adventive in disturbed areas. | ON west to AB, south to w. LA, TX, NM, AZ, CA, and Mexico (CHH, SIN, SON). | 
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Cleomaceae | Polanisia erosa ssp. breviglandulosa | | Sand plains. | Endemic to s. TX. | |
Cleomaceae | Polanisia erosa ssp. erosa | Sandhill Clammy-weed | Sandhills, dry prairies. | Sw. AR and OK south to w. LA and e. and sc. TX. | 
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Cleomaceae | Polanisia jamesii | James's-weed | Sandy prairies. | WI, MN, and SD south to IL, TX, and NM. | 
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Cleomaceae | Polanisia tenuifolia | Slenderleaf Clammyweed, Pineland Catchfly | Longleaf pine sandhills, Florida scrub, pine rocklands. | E. GA (several counties from the SC border) (Jones & Coile 1988) south to s. FL, west to s. MS. | 
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