FILICES. 
dromous pinna, however, 
’ 
the order becomes inverted by gradual approximation of the 
segments are anadromous; phegopteroid when the one 
nd all 
gmen 
When the upper pinnae of a phegopterotd frond a 
become anadromous before the middle t 
Sporangia cemented together in oe. BEE: 
Sporangia free: 
Sporangia arranged in rsa 6 the apex of a linear “¢r 
Sporan _- investin ne end of a vein beyond th 
margin of pi ne. 
nacineie Siiatiate: receptacle enclosed 
Involucre urceolate or tubular; the filiform receptacle 
Sporangia co ing the whole under face of the frond 
se irpon oolibeuss into globose or elongate 
ked : 
Sori globose 
Sporangia a sessile; frond remgeeigss with a 
bud between the fork br: anch : 
Stn articulate with the rhizome 
continuous with the rhizome . 
Sori gh air 
Sori on veins diverging from the midrib 
Sori in a al groove 
Sori with an cuvehaess or indusium 
Sori = es on the back of the Sone: 
Sori ose : 
pening Sesto or cordate, inserted on the apex 
the naitonee user continuous with the 
1 at eo 
‘ond stab of indefinite sh wth 
Morcnd hood-shaped, a ched with a 
under the sorus, oii to the obec 
Sori linear or oblon 
Sori oblique to the Hb: the involucre opening up- 
ward and inward : i 
Sort parallel = han rib; the invol pening to- 
ward the 
ri pil ar a, in a sin; voit rg 
Sori interrupted, in one or two lin’ 
Sori subm eet or marginal; the s inestnens opening 
ri globose: 
Sori submarginal; involucre eee mere. adnate 
iene the sides 
bmarginal, free at the sides 
541 
this is often not the case, but at a certain point of its length 
nerves or segments of the 
re catadromous at their bases but 
ond is picts ge I ebphegopter oid. 
2. Schizaea. 
24. Hymenophyllum. 
Trichomanes. 
Acrostichum. 
28 
3. Gleichenia. 
8. ct i 
9, Phegopter 
6. et 
7. Vitta 
10. Aspidium. 
11. Nephrolepis. 
12. Cystopteris. 
15. Asplenium. 
13. Sadleria. 
Doodya. 
16. Lindsaya. 
fok 
ceo) 
. Microlepia. 
Odontoloma. 
