PTERIS. 213 



nearly horizontally j)atent, sori continuous on almost every 

 pinnule moderately broad, involucres very narrow, stipes and 

 rachis glabrous tawny. — Schlecht. Fil. Mex. in Linnam, v. 

 p. 614. Liebm.. Fil. Mex. p. 79. Pt. grandifolia, Mart, and 

 Gal. Fil. Mex. p. 52 {not Willd.). Litobrochia Mexicana, 

 Fee, Gen. Fit. p. 136. 



Hab. Mexico ; between Mazatlan and Colipa, Schiede and Deppe ; Sta. Maria, 

 Tlapacoyo, Liebmann; Oaxaca, elev. 5000 ft., Galeotti, n. 6376. Sierra San 

 Pedro Nolasco, Talea, etc., Jurgensen,n. 871 and 715. Tapilulaand San Bartolo, 

 Chiapas, Linden, n. 1521. — A species clearly allied to the following, Pt. 

 Hcenkeana, but quite distinct. Pinnules much smaller, narrower in propor- 

 tion to their length, serrated only (and not spinulosely) at the apex, and, in all 

 my numerous specimens, not only always sessile, but the lower margin is alato- 

 decurrent. 



88. Pt. (Litobrochia) Hankeana, Pr. ; frond bipinnate 

 subcoriaceous, pinnules oblong-lanceolate finely acuminate 

 cuneate at the base more or less petiolulate the margins spinu- 

 loso-serratCj veins sunk everywhere anastomosing, the longest 

 and broadest areoles forming a series next the costa the rest 

 lie in series of narrow-oblong or linear areoles horizontally pa- 

 tent smallest next the margin, sori rather broad continuous, 

 involucres very narrow, stipes elongated and rachises pale- 

 brown, caudex thick elongated horizontal clothed with ap- 

 pressed rigid subulate scales. — Pteris Hcenkeana, Pr. Reliq. 

 Hcenk. p. 55. Ag. Sp. Gen. Pterid. p. 54. Litobrochia Hsen- 

 keana, Presl, Tent. Pterid. p. 149. t. 5./. 24. Pteris ampla, 

 Kze. Syn. PL Crypt. Pcepp. in Linnaa, p. 74. 



Hab. Peru, Pampayaco, Poeppiff in Herb. Nostr. ; Carrapi, Mathews, n. 1803. 

 New Granada, Ocafia, Purdie, Linden, n. 1028, Schlim, n. 644 and n. 597, elev. 

 5-7000 ft. ; Woods. Antonio, Nevada di Sta. Martha, Purdie. — This is a noble 

 species, of which our smallest entire specimen is three feet long. The pinnules 

 are often a span and 10 inches long, and If inch wide. 



{Pinnules small, coriaceous, entire. — Pellffioideae.) 



89. Pt. (Litobrochia) Burkeana, Hook. ; caudex very short 

 thick erect chaffy at the apex with tawny scales, roots wiry, 

 fronds fasciculate (small) ovate coriaceous opaque glabrous 

 pinnate below bipinnate with three to five pinnules, pinnae 

 of the upper portion and pinnules of the lower pinnae arti- 

 culated on short black petiolules mostly opposite oblong- 

 elliptical or oblong-lanceolate obtuse one to two inches 

 long, veins immersed anastomosing, areoles oblong obliquely 

 arranged, sori narrow continuous to the very apex, involucre 

 membranaceous, stipes and rachis (villous on one side) and 



VOL. II. 2 F 



