100. EILICES. 451 



Teeth much more persistent than in the preceding, usually hlack. 

 — Neai- Belfast. Chevy Chase near Gort. P. VU. VIU. I. 



9. JE. variegdtum (Schleich.) ; st. simple or slightly hranched 

 very rough with 4 — 10 furrows, sheaths sligMly, enlarged upwards 

 green below black above, teeth hlunt each tipped with a deciduous 

 bristle. — M. F. 66. N. 31. — St. about a foot high, erect, usually 

 simple except at the base or irregularly branched, its central 

 hollow equalling g of diameter. Lower half of the sheaths 



freen like the stem, upper part black ; teeth persistent ovate, 

 lack in the centre, with a white membranous margin. Spike 

 apiculate. — K WSsoni (Newm. 39. S. 10) is a large form. 

 — ^. arenarium ; st. procumbent, usually more slender; teeth of 

 the sheaths wedgeshaped. E. variegatum Sm., E. B. 1987. 

 S. 11. — Wet places, or in water. /3. Sandy places near the sea. 



P. vn. vm. E. S. I. 



Order C. FILICES. 



Leafy plants v?ith a rhizome or trunk. L. or fronds usually 

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

 Fructification springing from the veins on the underside or at 

 the edge of the 1., of 1-celled capsules (thecse) which are stalked 

 and have an elastic ring or sessile and vrithout a ring. 



* Capsules with an elastic marginal ring. 



Suborder I. POLYPODIACE^. 



Capsules in dorsal or marginal clusters, opening transversely 

 or irregularly. Young fronds circinate. 



•j- Clusters dorsal. Sing vertical, umally incomplete. Caps, 

 opening transversely. 



Tribe I. POLYPODIEM. Clusters nearly circular, without 

 an indusium, seated upon the back of the lateral veins. 



1. Cbyptogeamme. Clusters circular, at length confluent, 



concealed by the reflexed '- "^ "'" " '—• ' "° -" 



fertile fronds dissimilar. 



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

 nds 



2. PoiiTPODiuM. Clusters circular, naked ; edge of the frond 

 flat, not reflexed. 



3. WoODSiA. Clusters circular, with an inferior involucre 

 divided at the edges into many capillary segments. 



