BEAUTIFUL FERNS. 
99 
in Linnaea, xiii., p. 146, etc. — Ncphrodium Filix-mas, var. parallelogram- 
mum, Hooker, Sp. Fil., iv., p. 116. — Dichasium parallclogrammum 
and D. patentissimum. Fee, Gen. Fil., p. 302, t. xxiii, B. — Lastrea 
truncata, Brackenridge, Fil. of U. S. Expl. Exped., p. 195, t. 27 
(admirable).^ 
Had. — In one form or another, this species occurs in America from 
Greenland to Peru, throughout Europe and Asia, in parts of Africa, and 
in many islands of the ocean. The ordinary European form correspond- 
ing to Moore’s plate XIV has been collected in British Columbia by 
Dr. Lyall, in Keweenaw Peninsula of Northern Michigan by Dr. Rob- 
bins, and in the mountains of Colorado by Messrs. Hall & Harbour and 
Mr. Brandegee. Var. incisum was found at the base of calcareous rocks 
at Royston Park, Owen Sound, Ontario, Canada, by Mrs. Roy, and in 
the mountains of Colorado by Dr. Scovill, for one of whose specimens 
I am indebted to D. A. Watt, Esq., of Montreal. Fragments of ap- 
parently the same form have been received from Dakota. The Califor- 
nian plant mentioned in Plantae Hartwegianae, p. 342, is better regarded 
as a form of Aspidium rigidum. Var. palcaceum has not been found in 
either Canada or the United States, but is well known in Mexico, in 
Europe, in Southern Asia, in the Hawaiian Islands, etc. 
Description: — This fern has a stout, usually ascending, 
but sometimes erect, very chaffy root-stock, very much like 
I Milde indicates several other unimportant variations ; and Hooker & Balcer have 
as varieties of this species the East Indian Aspidium cocJdeatum, and Aspidium elonga- 
tum, from Madeira and the Canaiy Islands. The latter they give as occurring also in the 
southern United States, evidently supposing it to be the long-lost A. Ludovicianum ol 
Kunze. For abundant synonymy of Aspidium Pilix-mas the student is referred espe- 
cially to the works of Hooker, Milde, Mettenius and Moore, as quoted above. 
