164 Rhodora [July 



CASTALIA 



Calyx 4-5-phyllus, marginem tori cingens. PetaU 20-30, pericarpio 

 a basi usque ad medium insert a. Filamenta 60-150, pericarpio altius 

 inserta, libera, etc. 



The facts which we have presented were evidently known to Sir J. E. 

 Smith. In his Florae Graecae Prodromus (1808-09) he approved of 

 Salisbury's division of the old genus Nymphaea, but he showed dis- 

 approval of Salisbury's nomenclature by remarking, "at minus bene 

 Nymphaeam antiquorum veram, nomine, Castalia. . . . distinxit." 

 Also, in Rees's Cyclopedia (Vol. 25, Art. Nymphaea) he noted that the 

 difference between the white- and the yellow-flowered groups of Nym- 

 phaea were recognized by Linnaeus. Smith was right, therefore, in 

 retaining Nymphaea L. emend., for the white waterlilies, and restoring 

 the old prelinnean name Nuphar for the cow-lily group. For this 

 latter group had not previously received a valid generic name in post- 

 linnean times. 



It would be only a technicality to argue that, according to rules of 

 nomenclature accepted in some places, the Linnean genera are not 

 valid because no species are cited as belonging to them. A comparison 

 of the texts of the fifth and sixth editions of the Genera Plantarum 

 shows that N. alba is the Nymphaea of ed. 6. And it is generally 

 accepted that ed. 5 is referred to the Species Plantarum of 1753 (In- 

 termit. Rules, Art. 37, 38). Furthermore, the International Rules 

 admit a genus as valid if adequately described, regardless of whether 

 any species are mentioned. Thus Nymphaea stands for the white 

 waterlilies, on the authority of Linnaeus 17(>4. 



We must conclude therefore that the valid genera are: 



Nymphaea Linn. 1764 - | Nymphaea Linn. 1754 ('53) in part. 



( Castalia Sahsb. 1805-06. 



J Nymphaea Linn. 1754 ('53) in part. 

 Nuphar Sm. 1808-09 = < Nymphaea Salisb. 1805, not Linn. 



( 1764. 



Nelumbo Adans. 1763 = \ ^T&T ^ 17M ( ' 53) in part 



( Nelumbium Juss. 1789. 



Gray Herbarium of Harvard University. 



