EHRHART'S FERN. 109 
_ This fern is common in Rhenish Prussia, ond grows 
Cheshire; Oxton Bogs, Nottinghamshire ; Bawsey 
Heath, Norfolk; and Epping Forest, Essex. 
Uliginosum grows freely in cultivation, retaining all 
the characters which distinguish it as a wild plant: im 
_ the spring it is twenty days later than Multiflorum in 
“expanding, ten days later than Spinosum, and from 
ten to fifteen days earlier than Callipteris. When. 
potted it requires nothing but peat, and the pot should 
be te constantly standing in water 
25, EHRHART’S FERN. Catziprenrts. 
Polypodium Callipteris, Hhrhart. B. F. 169, 178. 
Mpidinn cristatum, Sir J. E. Smith. 
_ My readers will find this fern generally known - 
the name of Cristatum, given it by Sir James Edward 
‘Smith, one of our ablest and most distinguished 
botanists. The objections I haye to retain this name 
are, first, that Ehrhart’s name is older than Smith’s; 
and, secondly, that Linneus, who gave the name 6f 
Cristatum before either of these illustrious botanists 
shad been heard of, applied it to a group. of 
