204 Underwood: American ferns 



Selaginella sp. 



Florida : Dade County, Small & Carter, A. A. Eaton. 



Erroneously reported by Mr. B. D. Gilbert as Selaginella 

 caribensis Jenman, a species of the higher mountains of Jamaica {cf. 

 Fern Bull. 13 : 74. 1905). We await a report on this interest- 

 ing species from Professor Hieronymus. 



Species exchtdenda 



Selaginella Engelvianni Hieron. Hedwigia 39 : 294. 1900 

 5. densa Rydb. and is therefore not to be included in the list except 



as a synonym. 



ISOETACEAE 



Isoetes occidentals Henderson, Bull. Torrey Club 27: 358. 

 1900. (Type from Lake Coeur d'Alene, Idaho, Henderson 



:> 



8 7 6.) 



Isoetes lacustris paupercula Engelm. Trans. Acad. Sci. St. 

 Louis 4 : 377. 1882. 



Isoetes paupcrcida A. A. Eaton, Proc. U. S. Nat. Mus. 23 : 

 649. 1 90 1. 



Colorado to California, Idaho, and Washington. 



In accordance with the now established doctrine that species and 

 not varieties are the units of classification, this name set aside under 

 former rules should be restored. The writer wishes to record the 

 fact that he has persistently opposed the principle of giving varietal 

 names a standing in nomenclature since it was proposed at the 

 Madison meeting and there voted. The pernicious effects of this 

 principle have been fully appreciated by all who have tried it on 

 any extensive scale. 



Isoetes heterospora A. A. Eaton, Fernwort Papers 8. 1900. 

 (Type from Jordan Pond, Mt. Desert Island, Maine, Rand.) 



Known only from its type locality. 



A 



1900 



(Type from St. Francis Lake, Maine, Pringle.) 

 Maine : Reported from several stations. 



Isoetes Gravesii A. A. Eaton, Fernwort Papers 14. 1900 

 (Type from Connecticut, Graves. Underwood.) 



