G2 OSMUNDA, Lin. 1737. 
Plenasmm, Presl. 1836. 
Osmundastrum, Presl. (1815) 1847, 
Struthiopteris, Bernh. 1800, 
Aphyllocalpa, Cav. 1802. 
Reidlea, Mirb. (pt.) 1803. I 
Order MARATTIACEiE. Tribe MARATTINE^. 
§ 1. ANGIOPTERIDE^. 
03 ANGIOPTERIS, Hoffm. 1793. 
Clementea, Cav. 1802. 1 Psilodochea, Presl. 1845. 
§ 2. MAUATTIEiE. 
(a) Sori sessile on the veins. 
* Sori involucrate, i. e., Seated in an invohicre. 
64 MARATTIA, Sm. 1793. 
Celanthera, Thouiii. 1786. j Discostegia, Presl. 1845. 
Myriotheca, Comm. Juss. 1789. ' 
Order OPHIOGLOSSACEiE. 
(a ) Fructifications paniculate, on a contracted rachiform branch. 
65 BOTRYCHIUM, ,5'^^. 1800. 
Osmunda, Bernh. 1800. 
Botrypus, Rich. Mich. 1803. 
( h) Fructifications Spicate, the S2)ore-cas€s arranged in croiuckd glomerate tufts, forming distichous Spikes. 
6 J HELMINTHOSTACHYS, Klfs. 1824. 
Botryopteris, Presl. 1825. 
Ophiala, Desv. 1827. 
(c) Fructifications Sjncate, the Sjmx-cases arranged in a Single marginal Series. 
67 OPHIOGLOSSUM, Lin. 1737. 
Ophioderma, (Bl, 1828): Endl. 1836. I Cheiroglossa, Presl. 1845. 
Rhizoglossum, Presl. 1845. | Cassiopteris, Kar.st. MS., KL. 1847. 
Order LYCOPODIACEiE. 
§ 1. LYCOPODIE^. 
( a ) Fructifications consisting of Anther idia onlij. 
* Spore-cases one-celled. 
G8 LYCOPODIUM, Lin. 1737. 
Selago, Dill. 1741. | Plananthus, Pal. de B. 1805. 
Huperzia, Bernh. 1800. i Chamreclinis, Mart. 1829. 
Lepidotis, Pal. de B. 1805. ! Diphasium, Presl. 1847. 
* Spore-cases three-celled. 
G9 PSILOTUM, Sw. 1800. 
Bernhardia, Willd. 1802. 
HofFmannia, Willd. 
Ipphia, Noronha, 1811. 
Tristeca, P. de Beauv. MS. Desv. 1827. 
(b) Fructifications comprising both Antheridia and Oop>]ioridia 
70 SELAGINELLA, P. B. 1805. Spring, 1838. 
Garsaultia, Commerson, MS. Spring, 1848. 
Buchosia, Commerson, MS. Spring, 1848. 
Mirmau, Adans. 1763. 
Acopodium, Necker. 1790. 
Diplostachyum, Pal. de B. 1805. 
Gymnogynum, Pal. de B. 1805. 
Didiclis, Pal. de B. 1803. 
Stachygynandriiim, P. B. 1805, 
