FERNERIES OUT OF DOORS. 63 



List of North-American Ferns which are particularly 

 suitable for the greenhouse, but which may be cul- 

 tivated out doors at the South ; some possibly in 

 California. 



Acrostichum (Chrysodium) Aneimia adiantifolia, SWARTZ. 



aureum, LINN. Adiantum Capillus-Veneris, 

 Polypodium Plumula, H. B. K. LINN. 



Polypodium incanum, Vittaria lineata, SWARTZ. 



SWARTZ. Blechnum serrulatum, MICHX. 



Polypodium Californicum, Woodwardia radicans, var. 



KAULF. Americanum, HOOK. 

 Polypodium Phyllitidis, LINN. Nephrolepis exaltata, SCHOTT. 



Polypodium aureum, LINN. Aspidium cristatum, var. 



Gymnogramme triangularis, Floridanum, D. C. EATON. 



KAULF. Aspidium argutum, KAULF. 



Pteris longifolia, LINN. Aspidium unitum, var. gla 



Pteris Cretica, LINN. brum, METT. 



Aneimia Mexicana, Aspidium patens, SWARTZ. 



KLOTZSCH. 



Besides the above, there are many ferns, species 

 of Notholcena, Pellcea, Gymnogramme, and Cheilan- 

 thes, which require special cultivation, and are 

 referred to under that head ; but, as they are all 

 natives of this country, there must be places in it 

 where their successful out-door culture is possible. 

 There are still so few experimenters, that we must 

 wait until some one in an apparently suitable loca- 

 tion has courage and patience to make the trial. 



There are still ' other American ferns which are 

 or might be cultivated ; as Trichomanes Petersii 



