CRYPTOGRAM ME. POLYPODIUM. 521 



Tr. VI. OSMUNDE&. 



17. OSMUND A. Capsules clustered, arranged in a branched 

 spike terminating the frond. 



Suborder III. OPHIOGLOSSACE^E. 



Young fronds straight. Rachis succulent. Capsules regularly 

 2-valved, sessile, in clusters on a separate branch of the frond. 



Tr. VII. OPHIOGLOSSEM. 



18. BOTRYCHIUM. Capsules distinct, disposed in a compound 

 spike attached to a pinnate or bipinnate frond. 



19. OPHIOGLOSSUM. Capsule connate, disposed in a simple 

 distichous spike attached to an undivided frond. 



Suborder I. Polypodiactoe. Tribe I. Polypodies. 



1. CRYPTOGRAM'ME E. Br. Rock-brake. 



1. C. crifi'pa (R. Br.) ; barren fronds 2 3-pinnate, leaflets 

 wedgeshaped or linear-oblong often bifid at the end, leaflets of 

 the fertile fronds oblong. H. F. 39. Allosorus Bernh., N. 103. 

 E. B. 1160. Fertile frond nearly triangular. Veins alternate, 

 often forked and each branch ending in a cluster having no 

 indusium but concealed by the reflexed edge of the leaflet. 

 Height 6 12 in. St. slender, very brittle. Amongst loose 

 stones on mountains. P. VII. Parsley Fern. E. S. I. 



2. POLYPO'IHUM Linn. Polypody. 



* Clusters at the end of a veinlet, other veinlets knobbed at the end 

 and not reaching the edge. Rhizome without fronds at it* 

 end. Stipes jointed to rhizome. 



1. P. vulgdre (L.) ; frond deeply pinnatifid, lobes linear-ob- 

 long somewhat serrate all parallel upper ones gradually smaller. 

 E. B. 1149. H. F. 2. N. 111. Rhizome brown, densely 

 scaly creeping. Fronds strapshaped. Clusters large, on the 

 upper part of the frond. Lateral veins of the pinnas with 4 

 branches. Pinnae occasionally bifid at the end, sometimes 

 deeply serrate or even (P. cambricum L.) doubly pinnatitid. 

 Shady banks, walls and old trees. P. VIII. X. Common 

 Polypody. E. S. I. 



