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Photographer: Janice Stiefel
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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
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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  |
| 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) |
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 Raf.&phog=Derek Anderson&spcode=OXYRIG)
 Raf.&phog=Derek Anderson&spcode=OXYRIG)
 Raf.&phog=Emmet J. Judziewicz&spcode=OXYRIG)
 Raf.&phog=Emmet J. Judziewicz&spcode=OXYRIG)
 Raf.&phog=Merel R. Black&spcode=OXYRIG)
 Raf.&phog=Robert W. Freckmann&spcode=OXYRIG)
 Raf.&phog=Robert W. Freckmann&spcode=OXYRIG)
 Raf.&phog=Janice Stiefel&spcode=OXYRIG)
