Houstonia longifolia Gaertn.
Family: Rubiaceae
long-leaved bluets
Houstonia longifolia image
Kitty Kohout  
Houstonia longifolia image
Merel R. Black  
Houstonia longifolia image
University of Wisconsin - Madison (WIS-VP)  
Etymology: Houstonia: for Dr. William Houston, English botanist, who collected in Tropical America
Plants: erect, perennial, 3"-10" tall forb, several stems often branching toward the top
Leaves: all stalkless, opposite, widely linear to narrowly oblong, mostly smooth
Flowers: blue-purple to white, 4-parted, 1/4"-1/3" wide, tubular with a funnel-shaped mouth, hairy throat; inflorescence a terminal, branched cluster (cyme) of many, short-stalked, crowded flowers; blooms June-Aug.
Fruits: rounded capsule
Habitat: dry; prairie, barrens; in rocky, sandy soil
Conservation Status: Native
Houstonia longifolia image
Merel R. Black  
Houstonia longifolia image
Merel R. Black  
Houstonia longifolia image
Robert R. Kowal  
Houstonia longifolia image
Kitty Kohout  
Houstonia longifolia image
Derek Anderson  
Houstonia longifolia image
Derek Anderson  
Houstonia longifolia image
Derek Anderson  
Houstonia longifolia image
Derek Anderson  
Houstonia longifolia image
Aaron Carlson  
Houstonia longifolia image
Aaron Carlson  
Houstonia longifolia image
Houstonia longifolia image
Aaron_Carlson  
Houstonia longifolia image
Houstonia longifolia image
Houstonia longifolia image
Houstonia longifolia image