CHARACTERS OF TRIBES AND GENERA. 79 
Tribe 19.—ADIANTER, 
2, Ex. Adiantum, Hewardia. 
Tribe 20.—CHEILANTHES. 
. 8. Ex. Cheilanthes, Pellew, Cassebeera. 
Tribe 21,—PTERIDEAE. 
. 8. Ex. Pteris, Litobrochia, Lonchitis. 
Tribe 29, —BLECHNEX. 
. 11. Ex. Blechnum, Lomaria, Woodwardia. 
Tribe 23.—ASPLENIEZ. 
. 12. Ex. Asplenium, Scolopendrium, Diplazium. 
B. Ring of sporangia, horizontal, central. 
Tribe 24,—GLEICHENIES. 
Gen. 4. Ex. Gleichenia, Matonia. 
: Tribe 25.—HYMENOPHYLLES. 
Gen. 4. Ex. Hymenophyllum, Trichomanes. 
C. Ring of sporangia horizontal, IMS in somo 
incomplete. 
Tribe 26.—ScHIZER. 
Gen. 8. Ex. Schizea, Anemia, Lygodium. r 
Tribe 27,—QSMUNDACEZ. 
Gen. 2. Osmunda, Todea. 
D. Sporangia destitute of a ring. 
Division HI.—SCAPHOBRYA. 
socket-like appendages, and articulate with the caudex. ` 
= Tribe 98.—MARATTACEZ. — dis 
Gen. 5. Ex. Marattia, Danea, Angiopteris. : 
2. Evolution of the fronds straight. 
Tribe 29.—OPHIOGLOSSACES. nopan 
: Gen. 3. Sage Helminthostachy, Botrychium. wak d 
Fronds terminal, rising from between two stipuliform or yt 
