444 100. FiLicEs. 



Tr. VII. 0PHI0GL08SEJE. 



18. Botbychiitm:. Capsules distinct, disposed in a compound 

 spike attached to a pinnate or bipinuate frond. 



19. Ophioglossum. Capsules connate, disposed in a simple 

 distichous spike attached to an undivided &ond. 



Suborder I. Polypodiacece. Tribe I. Polypodieee. 



1. Cetptogeam'me B. Br. Eock-brake. 



1. C. cris'pa (R. Br.) ; harren fronds 2 — S-pinnate, leaflets 

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

 the fertile fronds oblong. — S. F. 39. Allosorus Bernh., iV. 103. 

 -E. JB. 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. E. S. L 



2. Poitpo'dium Linn. Polypody. 



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

 and not reaching the edge. Ehizome without fronds at its 

 end. Ctenoptbbis Newm. 



1. P. vulgdre (L.) ; fronds 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 pinnae with 4 

 branches. Pinnse occasionally bifid at the end, sometimes 

 deeply serrate or even (P. camhricmn L.) doubly pinnatifid. — 

 Shady banks, walls and old trees. P. VHI. — X. Common 

 Polypody. E. S. I. 



** Veinlets not knobbed hut reaching the edge, all usually fertile, 

 clusters near the end of each. Phizome with fronds at its 

 end. Gymnocabpitjm Newm. 



2. P. Phegop'teris (L.); fronds pinnate, pinnse linear-lanceo- 

 late imited at the base pmnatifid with linear-oblong blunt lobes, 

 lowest pavr of pinna turned downwards and forwards the rest 

 upwards, clusters marginal.—^. P. 2224. H. F. 3. K 115.— 

 Rhizome nearly black, vsdry, slightly scaly, creeping extensively. 

 Fronds triangular. Pinnse very acute, pointing upwards, rather 

 hairy, connected by their whole width with the rachis ; lowest 



