or 
in Journ. Bot. 1885, p. 106, 
290 TAKEDA—ASIATIC POLYPODIUMS. 
20. P, Buergerianum, Miquel. 
This fern has been recorded from China simply because 
P, brachylepis, Baker, which had been described from China, was 
reduced to P. Buergerianum, Miq.* Although this reduction 
was made by Mr. Baker himself, it is by no means correct, since 
his P. brachylepis was actually established on a specimen (prob- 
ably young) of P. superficiale, Bl.t 
The true P. Buergerianum, Miq. was really first recorded from 
China by Hooker,t but, unfortunately, since he mistook it for 
P. superficiale,§ the specimens were referred to as the latter 
plant; this has been confirmed by an examination of the 
original specimens. 
Since Hooker’s mistake the true P. Buergerianum, Miq. has 
always been called in Japan P. superficiale, Bl.; and the same 
error has been repeated by Luerssen.|| 
. Buergerianum differs from P. superficiale above all 
by the ramenta on the rhizome, which are ovate - lanceolate, 
long - acuminate, ciliato- dentate, and more or less patent, by 
the frond gradually attenuated below, and by the stipe short, 
narrowly winged with the decurrent base of the frond. 
So far I have not been able to discover any specimen of the 
true P. Buergerianum from any other locality in China, except 
Hongkong and Macao, but it occurs in several places in the south 
and south-west of Japan, and is also distributed as far as Tonkin, 
as will be seen in the following citation :— 
poy 
P. Buergerianum, Miq. amplif. 
a. stipitatum, Takeda. 
Syn. :—P. Buergerianum, Miq. Prol. Fl. Japon. pp. 334, 389; 
Bak. New Ferns, etc. p. 92, excl. syn. (1891). 
P. superficiale, Hook. Sp. Fil. v, p. 71, quoad pl. ex Tsushima 
et Hongkong; Hook. Bak. Syn. Fil. p. 355, quoad a ex 
Tsushima et Hongkong ; — in Engl. Bot. Jahrb. 
p. 360 (1883), et auct. Japo 
JAPAN. Tsushima (Wilford, n. 873); Hachijé (Dickins) ; 
: Nagasaki (Faurie, n. 15,641). 
Formosa. Tamsui District ee 1 28 
* Baker, Summary of New Ferns, etc. in Ann. Bot. v, p. 4 
} Under the description of P. bach, ~ Gard. Chron 494 
(1880), the author states that his fern is ‘ ed to P. iniosles a pare 5 
The plant has, however, no relationship with re ivtoides. 
¢ Species Filicum, v, p. he 
§ Hooker, lc. quoad pl. ex Hongkong et Tsushima, fide specc. in hb. Kew. 
|| Engl. Bot. Jahrb. iv, p. 360 (1883). 
Sine ir ets ae y mistake as P. normale var. sumatranum, 
