New York Metropolitan Flora
By Science Staff
Not peer reviewed
Last Modified 03/20/2013
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Three species of
have been reported from our flora. The native
(Pursh) Arn. and
(Nutt.) Fisch. & Meyer and the non-native
Schkuhr. All three species differ by subtle micro-morphologies and further research is needed to clarify the occurrence and distribution of these taxa in our area.
species are possibly more common than the map would indicate. Due to their very diminutive stature, their submerged habitat, and often-encountered sterile condition (seeds are essential for positive identification), they might be under-reported/collected.