( * ) 
lnvol. bursting irregularly down centre : eori on 
primary veins. 
(Single species. ) 39 Allantodia. 
Sori submarginal. 
Frond flabellate. (Single species). 
40 Actiniopteris. 
Sori without involucre. — Gen, 2 and 60 — 48 — 61. 
Sori on bach of lobes, (to 55. ) 
Fr. creeping, branched or dichotomous : segm 
small, suborbicular or pectinate. 
2 Gleichenia. 
Fr. arborescent : sori globose, at or in forking 
of vein. 
(Distinguished from Cyathea by absence of invo- 
lucre). 6 Alsophilla. 
f Sori not more than tivice as long as broad : round. 
rarely obi. 48 Polypodium. 
* Desmobryoid series. Stems continuous with 
caudex (as Aspidium) : sori medial on veins. 
Euphlegopteris Goniopteris, Dictyopteris. 
* * Esemobryoid series. Stems articulated to 
rhizome : sori (generally) terminal on veins. 
Eupolypodium, Goniophlebium, Campyloneu- 
ron including Niphobolus, Phymatodes includ- 
ing Drynaria and Dipteris. 
(The largest genus, including the above two dif- 
ferent habits of growth, and various kinds of 
venation.) 
•f* f Sori more than twice as long as broad, usually 
linear. 
On veins over undersurface, simple or forked. 
52 Gymnogramme. 
