Cuphea viscosissima

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Cuphea viscosissima
Cuphea viscosissima wild.jpg
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Myrtales
Family: Lythraceae
Genus: Cuphea
Species: C. viscosissima
Binomial name
Cuphea viscosissima
  • Cuphea petiolata (L.) Koehne
  • Lythrum petiolatum L.
  • Parsonsia petiolata (L.) Rusby [1][2]

Cuphea viscosissima, also known as blue waxweed,[3][4] clammy cuphea or (ambiguously) as "tarweed",[1][5] is an herbaceous plant in the loosestrife family. It native to the eastern United States,[6] where it is most often found in open, rocky calcareous areas.[7][8] It is the most common and widespread Cuphea in the U.S.[9]

This species is notable for its sticky stems. It produces a purple-red flower in late summer.[10]

This species is morphological similar to Cuphea lanceolata, which is found in Mexico. It can be distinguished from Cuphea lanceolata by its smaller flower.[9]


  1. ^ a b Cuphea viscosissima at Germplasm Resources Information Network
  2. ^ "Cuphea viscosissima". Integrated Taxonomic Information System. Retrieved October 25, 2007. 
  3. ^ Blanchan, Neltje (2002). Wild Flowers: An Aid to Knowledge of our Wild Flowers and their Insect Visitors. Project Gutenberg Literary Archive Foundation. 
  4. ^ Cuphea viscosissima at USDA PLANTS Database
  5. ^ Cuphea viscosissima at Plants For A Future
  6. ^ "Cuphea viscosissima". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2013. Retrieved 20 January 2017. 
  7. ^ "Flora of the Southern and Mid-Atlantic States". 
  8. ^ Missouri Botanical Garden
  9. ^ a b Graham, Shirley (1988). "Revision of Cuphea Section Heterodon (Lythraceae)". Systematic Botany Monographs. 20. JSTOR 25027697. doi:10.2307/25027697. 
  10. ^ Missouri Plants