Photographer: Robert H. Read
Proserpinaca palustris L. var. crebra Fernald & Griscom
common mermaid-weed, marsh mermaid-weed
Proserpinaca: Pliny's name of Polygonum meaning "pertaining to Proserpine"
palustris: "of marshes"
|Plant: ||perennial, semi-aquatic to aquatic, often found in clones; stems with many short, dark spikes|
|Flower: ||purplish to greenish, 3-parted, small, sepals triangular; solitary to 3 together, stalkless in the axils of the emersed leaves|
|Fruit:||1/10" wide, nut-like, not winged, sides nearly flat, 3-seeded|
|Leaf:||alternate, submersed leaves oval to oblong and pinnately dissected|
|Habitat: ||swamps, marshes, shores, ephemeral woodland ponds|