Identification of Glossostigma species

[Ann F. Rhoads]

A tiny aquatic plant in the family Scrophulariaceae has recently been
collected in several inland lakes and ponds in eastern Pennsylvania and
New Jersey.  We've been able to identify it as a member of the genus
Glossostigma, but do not have access to a key to the 5 or 6 species said
to comprise this genus, which according to our sources, occurs in
Australia, New Zealand, Africa and India.  Can anyone suggest a reference
with keys and descriptions of the species of Glossostigma?  Has anyone
else found a member of this genus in eastern North America?

Ann F. Rhoads
Morris Arboretum of the University of Pennsylvania
9414 Meadowbrook Ave.
Philadelphia, PA 19118
215 247 5777 x134
rhoadsaf at pobox.upenn.edu