4-25 Zannichelliaceae, horned pondweed family

Marian C. Munro; Ruth E. Newell; Nicholas M. Hill

Authors

Marian C. Munro Nova Scotia Museum, Halifax, NS
Ruth E. Newell E. C. Smith Herbarium, Acadia University, Wolfville, Nova Scotia
Nicholas M. Hill Fernhill Institute, Kentville, Nova Scotia; Acadia University, Wolfville, Nova Scotia and Dalhousie University, Halifax, Nova Scotia

Keywords:

Magnoliophyte, horned pondweed family, monocots, Zannichellia, horned pondweed

Abstract

All aquatic plants, they frequent fresh or brackish waters. A small family, there are only four genera. A single species reaches North America including Nova Scotia. Typically, they have submerged unisexual flowers, arising from the leaf axils. Perianths are absent or reduced to three minute tepals. Stamens are solitary; ovaries 1-9. The fruits are achenes bearing persistent styles. Leaves opposite or whorled, scalelike or linear, with a single vein. The stems are dimorphic, upper ones are leafy while the lower ones are stoloniferous. Image use given by Roger Lloyd and David Mazerolle.

Author Biographies

Marian C. Munro, Nova Scotia Museum, Halifax, NS

Curator of Botany (NSPM)

Ruth E. Newell, E. C. Smith Herbarium, Acadia University, Wolfville, Nova Scotia

Curator of the E. C. Smith Herbarium (ACAD)

Nicholas M. Hill, Fernhill Institute, Kentville, Nova Scotia; Acadia University, Wolfville, Nova Scotia and Dalhousie University, Halifax, Nova Scotia

Director; Adjunct Professor