198 FLORA OF SOUTH AMERICA. 
of sori, it would scarcely be considered an Adiantum. It has 
so much the aspect of Lindsea macrophylla, Kaulf. (now 
Schizoloma), that Kunze appears to have taken it for that, but 
the genus Schizoloma differs materially both in the structure 
of its sori and venation from Adiantum. 
725. A. villosum, Willd. l. c. p. 444. British Guiana, 
Schomburgk, n. 379. French Guiana, Herb. Par. n. 273. 
726. A. obliquum, Willd. l. c. p. 429. Hook. et Grev. Ic. fil. 
1.190. French Guiana, Herb. Par. n. 390. 
727. A. obtusum, Desv. Spreng. Syst. 4. p. 113. Hook. et 
Grev. Ic. fil. t. 188. French Guiana, Herb. Par. n. 388. 
728. A. triangulatum, Kaulf. En. fil. p. 204. British Gui- 
ana, Schomburgk, n. 48 and 90. 
729. A. politum, Humb.—Willd. l. c. p. 442. British Guiana, 
Schomburgk, n. 349. 
730. Doryopteris palmata, J. Sm. in Journ. of Bot. vol. IV. 
p. 162. Pteris palmata, Willd. l. c. p. 357. Sierra Caraman, 
Rio Branco, Schomburgk, n. 218.—This is very variable in 
size, and in the more or less lobed character of its fronds. 
In some collections this species is found mixed along with 
Pteris pedata, Linn.; but the latter has free venation, and 
I place it in Cassebeeria, whereas Doryopteris is characterised 
by the reticulated veins. 
731. Litobrochia denticulata, Presl. pterid. p. 149. Pteris 
denticulata, Sw. Willd. l. c. p. 372. Hook. et Grev. Ic. fil. t. 
28. British Guiana, Schomburgk, n. 40, a. 
732. Pteris pungens, Willd. l. c. p. 387. Mountains at 
Ataraipou, British Guiana, Schomburgk. 
/33. Blechnum serrulatum, Rich. (non. Willd.) Schk. 
crypt. t. 100. B. angustifolium, Willd. l. c. p. 414. B. calo- 
Phyllum, Lang. et Fisch. Ic. fil. t. 23. B. stagninum. Radd. 
Bras. fil. t. 64. British Guiana, Schomburgk, n. 445. 
- Tribe AsPLENIEJE. J. Sm. 
734. Asplenium serratum, Linn. Willd. 1.c. p. 304. British 
Guiana, Schomburgk, n. 323 and n. 611. The latter number 
