Robert W. Freckmann Herbarium


Because of technology changes and personnel changes at UWSP and the Wisconsin State Herbarium, the database of plant species housed at this site was merged with the database from the OLD WisFlora website to create a new Flora of Wisconsin website at Currently we are encouraging all Wisplant viewers to begin using the Flora of Wisconsin website as soon as possible. Wisplants will remain operational through July 13th. After that date, all traffic to Wisplants will be redirected to the Flora of Wisconsin website.

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  Houstonia longifolia Gaertn. image
Photographer: Merel R. Black           

Kitty Kohout

Merel R. Black

Robert R. Kowal
Family Rubiaceae
Houstonia longifolia Gaertn.
long-leaved bluets
Houstonia: for Dr. William Houston, English botanist, who collected in Tropical America
longifolia: longus for "long, extended;" folius for "leaves"
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: erect, perennial, 3"-10" tall forb, several stems often branching toward the top
Flower: 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.
Fruit:rounded capsule
Leaf:all stalkless, opposite, widely linear to narrowly oblong, mostly smooth
Habitat: dry; prairie, barrens; in rocky, sandy soil

More Information Natural Communities Herbarium Specimens
All Houstonia list Google- Images or Text
Hedyotis longifolia (Gaertn.) Hook.
Hedyotis purpurea (L.) Torr. & A.Gray var. longifolia (Gaertn.) Fosberg
Houstonia longifolia Gaertn. var. compacta Terrell
Houstonia longifolia Gaertn. var. glabra Terrell
Houstonia longifolia Gaertn. var. longifolia
Houstonia purpurea L. var. longifolia (Gaertn.) A.Gray

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