yor? 
n5n%? 
292 TAKEDA—ASIATIC POLYPODIUMS. 
gevianum. It differs, however, from the latter above all by the 
frond, which abruptly narrows into a long, broadly-winged stipe, 
and also shows a tendency to become repand or more or less 
pinnatifid on the margin. The texture is thinner than in 
P. Buergerianum. 
Our plant is distributed over Japan and China. There can 
be distinguished two forms as diagnosed below :— 
P. subhastatum, Baker in Journ. Bot. 1889, p. 177, amplif. 
a. hederaceum, (Christ) mhz. 1279 | 
Syn. :—P. hederaceum, Christ in Bull. Acad. Intern. Geogr. 
Bot. xi, p. 215, cum fig. (1902). 
Frondes et steriles et fertiles ovato-deltoideae, basi dilatatae, 
plus minus cordatae, fertiles raro quam steriles angustiores. 
14334 
CuInA. Hupeh: without special locality (Henry, n. 5450). 
8. longifrons, mihi, var. nov. 
Syn. :—P. Buergerianum, auct. Japon. non Miq. 
Frondes steriles oblongo-ovatae, saepe minus cordatae, 
fertiles quam steriles plerumque multo longiores angustioresque, 
elongatae ad vel raro supra 20 cm. lg., basi plus minus cuneatae. 
JAPAN. Without locality (ex hb. Coll. Sc. Imp. Univ. 
Téky6) ; in monte Higanesan (H. Takeda); also frequent in 
the south-west. 
22. P. superficiale, Blume. 
This fern was described and excellently figured by Blume 
in 1828. While all the records of the occurrence of this species 
in Japan have, without exception, been erroneous, the true 
P. superficiale is widely distributed over China, India, Java, 
Sumatra, etc. 
This species resembles P. Buergerianum so strongly that these 
two have often been confused by not a few pteridologists. 
However, the larger size and thicker texture of the frond, the 
longer stipe with the basal portion quite unwinged, and, above all, 
the large pale brown, ovate, obtuse ramenta more or less ap- 
pressed in the rhizome would Pee distinguish the present 
species from P. Buergerianum, Mi 
The identity of P. brachylepis, “Bak. with P. superficiale, Bl. 
has already been pointed out under P. Buergerianum, Miq. The 
Same species has also been described by Baker in 1880 as P. 
normale var. sumatranum, and again in 1898 by Christ under the 
name of P. nigrocinctum. The latter author distinguishes his 
plant by means of the thicker texture, the shorter and broader, 
almost oval-shaped frond, and so forth. However, these 
