and from Japan, from Erzeroum; but in the more tropical parts of 
Asia it seems unknown, even in the great Himalayan range, which 
exhibits so many European forms. In North America, in the 
United States and Canada, and in the Hudson’s Bay territories, 
it is frequent. East of the Rocky Mountains the majority of 
my very numerous specimens are rather small and oblong in 
outline, with compact blunt segments; whereas westward of the 
Rocky Mountains, and in California (whence I have only seen 
it from Benicia, A. B. Baton , U. S. Army), the fronds are larger, 
much acuminated, yet not universally so. South of California, 
on the great continent of America, I am not prepared to say it 
exists. The P. Kanoinshianum , A. Braun, of Mexico, which Mr. 
Moore refers to this species, I think will prove distinct. I possess 
it under that name and as P. plebeyum , Schlecht., and P. leu - 
costicton of Kunze and Klotzsch. Still our species is not wanting 
even in the southern hemisphere. From the Cape of Good Hope 
I have received unquestionable specimens from the late Colonel 
Bolton, and other stations are recorded there by Pappe and 
Rawson. 
Our Plate exhibits all the true characters of this species of 
the ordinary size and form, but it varies much in the length and 
breadth of the frond, sometimes being almost deltoid and some¬ 
times it is caudate at the apex. The abnormal form, var. “ Cam- 
bricum” which Swartz calls “ monstrosa varietas,” is not confined 
to Wales, as its name would perhaps imply. It is common in 
Teneriffe, and Mettenius says in southern Europe; but I have 
seen no specimens from North America. Those who take an 
interest in the freaks of Nature of this kind may consult Mr. 
Moore, l. c. y who has enumerated seventeen forms. 
Plate 2. Plant of Polypodium vulgare ,— nat. size. Pig. 1, 2. Segments of the 
frond of var. Cambricum. 3. Portion of a fertile segment of Poly podium vulgare, 
showing the venation and the sori from the apex of the*veinlet,— magnified. 
