Am looking for some Ceratopteris pteridioides (picture ref: Baensch Aquarium Atlas #1, page139). The University of Wisconsin Madison Botany Greenhouse is looking for some. Anyone willing to part with a specimen or know a source? Others on their search list include: Eichornia azurea, Hydrotriche hottoniiflora, Proserpinaca pectinata and Hydrothnix gardneri. Anyone have source information on these? John