284 TAKEDA—ASIATIC POLYPODIUMS. 
P. simplex var. aspidiolepis, Christ, in Bull. Soc. Bot. France, 
Mém. i, p. 16 (1905). 
P. macrosphaerum, Bak. in Kew Bull. 1895, p. 55. 
P. intramarginale, Bak., Christ, in Bull. Herb. Boiss. sér. 2, 
ili, p. 509 (1903); Bak. in Kew Bull. 1906, p-I 
he position of the sori of this species is subject to variation. 
In the typical case the sori are intramarginal, as one of the 
synonyms suggests. Sometimes, however, they are situated 
between the midrib and the margin,* or even nearer the midrib. f 
In the description of P. macrosphaerum the sori are incorrectly 
said to be marginal. This is, however, due to the strong in- 
rolling of the margin of the frond. In any case, this species is 
characterised by the ramenta on the rhizome, which are short, 
ovate, very obtuse, convex, entire, and fuscous-brown in colour. 
The texture of the frond is subcoriaceous to coriaceous, prob- 
‘ably according to different circumstances of habitat. 
The following specimens have been examined :— 
CuinA. Hupeh: Patung (Henry, n. 1273, 2556) ; Kiangsi: 
Kuling Ravine (Morse, n. 24) ; Szechwan: Mt. Omei (Faber, n. 
1063 ; Wilson, n. 5321); Yunnan: Tseku (Mombeig); Mengtsz 
(Henry, n. 9203, 10,042A, 13,363, part., 13,633; Hancock, n. 
49) ; without locality (Ducloux, n. 438; Delavay, n. 4318). 
InpIA. Khasia: Molim, 5800 ft. (Clarke, n. 43,6274). 
14. P. megasorum, Christensen. 
First described as P. macrosorum, Baker,t but the name has 
been changed to that given above. This fern has a similar 
appearance to the foregoing; it differs, however, in the very 
thick texture and the obtuse apex of the frond, and the subulate, 
black, clathrate, ciliato-denticulate ramenta on the rhizome. 
The sori are always uniserial between the midrib and the margin. 
The dimensions of the frond vary from 5 cm. by I cm. or less to 
20 cm. by 2 cm., and the stipe from I to 20 cm. in length 
This is an endemic species in Formosa, and appears to be 
notcommon. I have seen the following specimens :— 
Kelung, on rocks (Wilford, n. 518); Tamsui (Hancock, 
Nn. 31). 
15. P. Fortuni, Lowe. 
This species furnishes us with an instance of the enormous 
variation exhibited by ferns in the dimension of frond. The 
smallest frond (fertile) examined measures about 19 cm. long 
* In such specimens as Morse, n. 24; Wilson, n. 532 
_ } Clarke, n. 43627a. This specimen is very poor, “ut probably belongs to 
this species 
as Journ. Bot. 1885, p. 106. 
