Robert W. Freckmann Herbarium


  Oxypolis rigidior (L.) Raf. image
Photographer: Janice Stiefel           

Derek Anderson

Derek Anderson

Emmet J. Judziewicz

Emmet J. Judziewicz

Merel R. Black

Robert W. Freckmann

Robert W. Freckmann

Janice Stiefel
Family Apiaceae
Oxypolis rigidior (L.) Raf.
common water-dropwort, stiff cowbane
Oxypolis: from oxus, "sharp," and polios for "white;" from the awl-shaped, secondary bracts, and white petals.
rigidior: more rigid
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
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Status: Native
Plant: erect, perennial, 2'-4' tall, smooth forb with few branches; stems flattened; roots fibrous or thickened tubers
Flower: white, 5-parted; inflorescence a few, 3"-6" wide, stalked, compound umbels with 20 or more spreading, loose, open umbellets; blooms July-Sept.
Fruit:dry, both ends rounded, back very flat with 5 rib-like ridges along each side, splitting into 2 seeds that are 2 times as wide as long fruit drawing
Leaf:few, the wide base clasping the stem; pinnately-divided with 5-9 long and narrow, mostly stalkless leaflets
Habitat: wet to moist; swamps, marshes, wet prairies, fens
(Glossary)

More Information Natural Communities Herbarium Specimens
All Oxypolis list Ethnobotany Information Google- Images or Text
Synonyms 
Oenanthe ambigua Nutt.
Oxypolis longifolia (Pursh) Small
Oxypolis rigidior (L.) Raf. var. ambigua (Nutt.) B.L.Rob.
Oxypolis rigidior (L.) Raf. var. longifolia (Pursh) Britton
Oxypolis turgida Small

         
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