A serological and disc electrophoretic study of North American Typha

Pollen and seed proteins of seven selected North American and Puerto RicanTypha populations were compared using two serological methods and disc electrophoresis. These methods were capable of discriminating among all taxa studied:Typha latijolia, T. angustifolia, T. ×glauca, andT. domingensis. The two hybrid populations were found to contain proteins not found in either parent.Typha domingensis was serologically the most distinct of the four taxa. The diagnostic morphological characteristics forTypha species were studied in all populations, and statistical comparisons are presented. Data from the morphological observations agreed with the information obtained from the chemosystematic research. All data indicate that the three taxa should be maintained as separate species. The hybrid nature of the putativeT. ×glauca is verified by both the biochemical and morphological data. Observed morphological and biochemical differences support taxonomic treatments in whichT. domingensis is designated as a separate species