Family: Rubiaceae
button-weed, poor-Joe
[Diodia teres var. setifera Walter, more...]
Emmet J. Judziewicz
Robert H. Read
Etymology: Diodia: from the Greek for thoroughfare, from this plants habitats
Plants: erect to sprawling, annual, 8"-32" tall forb
Leaves: linear to lance-like, opposite, stalkless, stiff, rough
Flowers: white to pale purple, 4-parted, 1/4" long, funnel-shaped, stalkless; solitary from the upper leaf axils; blooms July-Sept.
Fruits: dry, hairy, roundish, splitting into 2 nutlets
Habitat: dry; in sandy soil, usually on large river floodplains
Plants: erect to sprawling, annual, 8"-32" tall forb
Leaves: linear to lance-like, opposite, stalkless, stiff, rough
Flowers: white to pale purple, 4-parted, 1/4" long, funnel-shaped, stalkless; solitary from the upper leaf axils; blooms July-Sept.
Fruits: dry, hairy, roundish, splitting into 2 nutlets
Habitat: dry; in sandy soil, usually on large river floodplains
Floristic Rating: Coefficient of Conservatism = 3, Wetland Indicator = FACU WIS DNR-Bureau of Endangered Resources: Detailed information on Wisconsin listed species including state and federal status, photos, etc. USDA Plants Database: Federal Distribution and detailed information including photos USDA Agricultural Research Service (ARS): Images of seeds, fruits, embryos, etc. Dan Tenaglia's The Missouri Flora: Fabulous photographs; detailed descriptions; color and leave arrangement key. David G. Smith's "Delaware Wilflowers": Beautiful photographs; descriptions Illinois Wildflowers: Wonderful photographs; detailed descriptions; color and leaf arrangement key
Robert H. Read
Emmet J. Judziewicz
Botancial Illustration