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Rcboulia hemisphaevica Radd XLII, 



Riicia bifuvca Hofjm XLII, 



— ciliata Hoffm XLII, 



— crystalFina L XLII, 



— fluitans L XLII 



— glauca L XLII, 



— Huebcncriana Lind XLII, 



— natans L XLII, 



— sorocarpa Bisch XLII, 



Spfiaerocai'pus terrestris Sm XLII, 



Targionia hypophylla L XLII, 



