|Photo was taken by Gil Nelson|
|Division:||Magnoliophyta - Flowering plants|
|Class:||Magnoliopsida – Dicotyledons|
| Jacquemontia tamnifolia|
|Natural range of Jacquemontia tamnifolia from USDA NRCS Plants Database.|
Common name: Hairy clustervine
Synonym: Thyella tamnifolia (Linnaeus) Rafinesque
This species has a climbing and twining behavior. 
"Herbaceous, annual, twining vine. Leaves ovate to elliptic-ovate, 5-12 cm long, acuminate, cordate, or the base rarely rounded. Peduncles equaling or longer than the subtending leaf; inflorescence capitate, 2-3 cm broad, subtended by lanceolate or elliptic, foliaceous bracts; sepals lanceolate to subulate, densely fulvous-hirsute; corolla blue, funnelform, 1-2 cm broad; stigma lobes 2, ovoid or oblong, styles fused, ovary 2-locular. Capsule subglobose, 4-6 mm broad; seeds brownish black, glabrous, ca. 2 mm long." 
This species has been found in floodplains and savannahs as well as disturbed areas such as old fields, corn fields, powerline corridors, along roadsides, and in grazed fallow fields. 
J. tamnifolia has been observed flowering in August.
Conservation and management
Cultivation and restoration
References and notes
- Florida State University Robert K. Godfrey Herbarium database. URL: http://herbarium.bio.fsu.edu. Last accessed: June 2014. Collectors: Andre F. Clewell, J. D. Dwyer, W. E. Harmon, Lisa Keppner, R. Komarek, Robert L. Lazor, and R. A. Norris. States and Counties: Florida: Leon and Washington. Georgia: Colquitt, Decatur, Grady, and Thomas. Countries: Honduras.
- Radford, Albert E., Harry E. Ahles, and C. Ritchie Bell. Manual of the Vascular Flora of the Carolinas. 1964, 1968. The University of North Carolina Press. 863. Print.
- Nelson, G. PanFlora: Plant data for the eastern United States with emphasis on the Southeastern Coastal Plains, Florida, and the Florida Panhandle. www.gilnelson.com/PanFlora/ Accessed: 12 DEC 2016