402 
Order CCLXXVIII. OSMUNDACE^. 
OsMUNDACEiE, R. Br. 1. c. 161. (1810); Agardh, 1. c. 115. (1822) ; Kaulfuss 1. c. 42. 
(1824) ; Bory 1. c. (1824). — AcROGYRATiE, Bernh. — Schiz^eace^, Mart. Ic. PI. 
Crypt. 113. (1834). 
Essential Character. — Thecce with an operculiform annulus, or without any, reti- 
culated, striated with rays at the apex, bursting lengthwise, and usually externally. 
GENERA. 
§ 1. OsMUNDEiE, 
Hooker. 
Osmunda, Sw. 
Aphyllocalpa, Cav. 
Todea, Swz. 
Angiopteris, Hoflfm. 
Clementea, Cav. 
§ 2. AneimiejE, Hook. 
Aneimia, Swz. 
Ornithopteris, Bernh. 
Schizsea, Swz. 
Lophidium, Rich. 
Ripidium, Bernh. 
Lygodium, Swz. 
Ugena, Cav. 
Odontopteris, Ber 
ValUfilix, Pet. Th. 
Gisopteris, Bernh. 
Ramondia, Mirb. 
Hydroglossum, W. 
Cteisium, Rich, 
i. Mohria, Swz. j 
Order CCLXXIX. DAN^EACE^. 
Agyratm, Swartz Synops. (1806). — Poropterides, Z. c. 66. (1810). — Dan^acejE, 
Agardh 1. c. 117. (1822). — Marattiace^, Kaulf. 1. c. 31. (1824) ; Bory l.c. (1824) ; 
Mart, ic.pl. crypt. 119. (1834). 
Essential Character — Thecce sessile, without any ring, concrete into multilocular 
sub-immersed masses, opening at the apex. 
GENERA. 
Danaea, Sm. 
Marattia, Swz. 
Myriatheca, Juss. 
Celanthera, Thouin. 
Kaulfussia, Bl. 
Order CCLXXX. OPHIOGLOSSACE.E. 
Ophioglosse^, R. Br. 1. c. 163. (1810); Agardh Aph. 113. (1822); Kaulfuss 1. c. 2^. 
(1824) ; Bory, 1. c. (1824) ; Mart. ic. pi. crypt. 39. (1834). 
Essential Character. — Thecce single, roundish, coriaceous, opaque, without ring or 
cellular reticulation, half 2-valved. Vernation straight. 
GENERA. 
Ophioglossum, L. Helminthostachys, Kaulf. Botrychium, Swz. 
Botryopteris, Presl. Botrypus, Mich. 
Ophiala, Desv. 
Alliafce II. LYCOPODALES. 
Essential Character. — f terns solid vascular. Reproductive organs growing on the 
stem. 
