SYNOPSIS 



THE GENEEA OF FEENS, 



CLASSIFICATION. 



PrnOALES=Aorogenou8 plants, with, dorsal or marginal one-celled 

 spore-cases. 



* Spore- cases fwrnished with ajoinied ring, which 



is nsaally nea/rly coiwplete, sometimes ruM- Order. 



mentor POLYPODIACE.a: 



+ Spore-cases not valyate. 



I) lUng vertical, nearly complete, spore-cases usually 

 stalked, gibbous, bursting transversely... 



[a] Eeceptaeles universal, i.e., occupying almost 

 or quite the entire disk of the fertile &onds, 

 both veius and parenchyma 



[e] Receptacles effuse, occupying a crowded mass 

 of reticulated Teiniets, forming large amor- 

 phous portions or separate lobes of the 

 fronds, or sometimes definite in form 



[c] Eeceptaeles local, circumscribed, i.e., confined 

 to determinate parts of the veins, definite 

 m form. 



(1) Sori transverse to the veins (when distinct 

 veins are present) ; parallel or sub-parallel 

 with the midrib or margiti; more or less 

 elongated, usually linear ; occasionally ob- 

 long 'or Innately curved; rarely punctiform 

 (then margiaal with transverse indusia). 

 (a) Beceptacles seated on or approximate to 

 the midrib, therefore costal or sub-costal 

 (often at the same time marginal by the 

 contraction of the frond) ; linear or ob- 

 long, 

 (o) Sori linear superficial indusiate 



IHlel. 

 POLYPODINEJE. 



§ 1. 



Acrostichese, 



§2. 



Platycerieae. 



§3. 

 Lomariese. 



(i) Sori linear or pblong, superficial or § 4. 



immersed, non-indusiate PleurogrammeSB. 



[Miirch,1857.] B 



