Key to Potamogetonaceae

View taxon page for Potamogetonaceae

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Stipules of submersed leaves free from 

blade 

Expanded portion of a leaf, petal, or other structure, generally flat but sometimes rolled, cylindric, wavy, or cupped.

base or fused to it < 1/2 

stipule 

Appendage at base of petiole, generally paired, variable in form but often leaf- or scale-like, sometimes a spine.

length; leaves submersed, also floating or not; 

peduncle 

Stalk of an individual flower borne singly, not in an inflorescence, or of an entire inflorescence, or the corresponding structure in fruit; the stalk subtending an involucre (e.g., in Asteraceae, Polygonaceae).

stiff; inflorescence generally floating to emergent ..... POTAMOGETON

1' Stipules of submersed leaves fused to blade base >= 2/3 stipule length; leaves submersed; peduncle flexible; inflorescence submersed ..... STUCKENIA

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