430 9.9. piLioEs. 



narkmi ; st. prooumbent, usually more slender^ . teeth of the 

 aheaths wedgeshaped. E. variegatum Sm., E. B. 1987. S. 11. — 

 Wet places, or in water. 0. Sandy places near the sea^ P. 

 VII. VIII. E. S. I. 



Order XCIX. HLICES. 



Leafy plants with a rhizome or trunk. L. or fronds circinate 

 when young (Tribe VII. excepted), simple or divided. Fructi- 

 fication springing from the veins on the underside or at the edge 

 of the 1., of 1-ceIled capsules (thecee) which are stalked and have" 

 ar( elastic ring or sessile and without a ring. 



* Capsules tvith an elastic marginal ring. 



Suborder I. POLYPODIACEtE. 



Capsules in dorsal or marginal clusters, opening transversely 

 or irregularly. Young fronds circinate. 



, t -Chfsters dorsal. Ring vertical, usiiallg incomplete. Caps. 



opening transversely. ' 



.Tribe L POLTPOBUSM Clusters nearly circular, without 

 an indusium, seajted upon the back of the lateral veins. ■ 



1. Ckyptogbamme. Clusters circular, at length confluent, 

 concealed by the reflexed margin of the frond.: — ^Barren and 

 fertile fronds, dissimilar. 



2. PoLYipoDiUM. Clusters circular, naked ; edge ofthefrqnd 

 flat, not' reflexed. , 



- 3. WoODSiA. Chisters circular, with an inferior involucre 

 divided at the edges into many' capillary segments. 



Tr. II. ASPIDIEjE. Clusters nearly circular, covered by an 

 indusium, seated upon the back of the lateral veins. 



.4., Lasthba. Indusium reniform, attached by the notch. 

 Veins distinct after leaving the midrib, not uniting with 

 those of the adjoining lobe. 



5. PoLYSTicHTJM. ludusium circular, attached by the centre. 

 Veins distinct after leaving the midiib. 



' 6. Cystoptebis. Indusium attached by its broad hooded 

 basfe under the clusters, with a long fringed ftee extremity 

 at first covering the' capsules. 



Tr. III. ASPLENiEM. Clusters oblong Or linear, usually 



