mag / CHARACTERS OF TRIBES AND GENERA. 
above. Sterile pinnules oblong, elliptical, oblique sub- 
cordate, serrulate, 1 to 11 inches in length. Veins forked ; 
venules free. Fertile pinnules linear, 2 to 3 inches long, 
revolute, margins conniving and forming an universal " 
indusium. Sporangia occupying nearly the whole length 
"of the short venules, forming linear forked confluent sori. 
Type. Llavea cordifolia, Lagasca, 
Ilust. Hook. and Bauer, Gen. Fil, t. 36 ; Moore Ind. 
Fil., p. 58, A.; J. Sm. Ferns, Brit. and For., fig. 52; 
Hook. Syn. Fil., t. 3, fig. 28. 
Oss.— This genus is founded on a Fern which I originally 
described in Hooker and Bauer's ‘‘ Genera Filicum” as a 
new genus, under the name of Ceratodactylis, without at 
the time being aware that it had been previously described 
under the name of Llavea, by Lagasca. In habit the sterile 
portion of the frond resembles Osmunda regalis, and the 
fertile pinnules by their revolute membraneous margins, 
have much the character of the fertile pinnæ of Struthiop- 
teris and Allosorus, while the forked linear sori gives it a 
. claim to be associated with Gymnogramma. 
Sp. L. cordifolia, Lag. (v v.) (Ceratodactylis — 
J. Sm. Hook. and Bauer, l. c.). 
This Fern has only been found near Oaxaca in Mater 
73.—PLAGIOGYRIA, Mett. (1858). 
Lomaria sp. Hook. Sp. Fil. 
= Vernation fasciculate, erect, acaulose, naked. . Fronds | 
-~ pinnate, là to 2 feet high, dimorphus; stipes 3 or 4 
. sided, thickened at the base, and furnished with spongy ` 
glands; sterile pinne 4 to 6 inches long, lanceolate acu- - 
minate, sessile or with a short petiole and articulate with ` 
the rachis. Veins simple or forked. Fertile frond con- 
