342 
4. Frond 10 times as long as broad — ... 3. holosorum. 
Frond 20 times as cb as broad — ... 2. ensiforme. 
5. Frondslobed  ... - 24, zeylanicum. 
ronds erage or once or more 
- 6. 
6. F ie pinnatifid ; bá .. 7. adnatum. 
Fronds once or more pinnate ss re 
7. Fronds once pinnate A 8, 
Fronds bipinnate or tripinnate - ; 
8. Pinnae entire 27. bantamense. 
innae crenate, serrate, lobed or 
innatifid 9. 
9. Pinnae crenate « or - inciso-crenate wee 10. 
Pinnae serrate, lobed or cae anaes sel 15. 
10. Pinnae dimidiate "5 e 11. 
Pinnae not dimidiate ... šis € 13. 
11. Pinnae 4 to $ inch lon zi e. 4. normale. 
Pinnae 1 inch long or more — .. ane 12. 
12. Sori 1 or rarely 2 in the teeth - mum cH cessit 
Sori not in the teeth .. .. 10. resectum 
13. Pinnae ? to 14 nd long | "i a 6. erinicaule. 
Pinnae 2 to 34 inches lon 4, 
14, Pinnae 3 to 34 inches Laine, crenulated 
the whole length . 26. Pullingeri. 
Pinnae 2 to 24 inches long, c crenulated 
towards the tip .. 25. chlorophyllum. 
15. Pinnae serrate ... de À 16. 
Pinnae lobed or pinnatifid v 18. 
16. Base of pinnae narrowed suddenly .. 28. sylvaticum. 
Base of pinnae cuneate 17. 
FY, T part of rachis with a narrow 
wng.. a 5. Wrightü. 
Rachis not winged ee ied e) 9. macrophyllum. 
18. Pinnae lobed : 19. 
Pinnae pinnatiid — ... 1.  ... 21. 
19. Lower pinnae 3-5-lobed .. 8. dimidiatum. 
Lower pinnae more than 5-lobed  .. 20. 
20. Lobes shorter on lower side of nes 
than on upper 18. macrocarpum. 
Lobes on both sides of ; pinnae ‘equal .. 29. japonicum. 
21. Rachis compressed ; sori marginal 29. 
Rachis eco suas ys sorinot marginal 23. 
22. Frond pinnate to the end ies -. 17. Belangeri. 
Frond e .. 16. rutaefolium. 
23. Rachis villous ... d ése -. 30. Petersenii, 
Rachis Vies naked  ... es -. SE Oldhami. 
24. Fronds tripinnate oe as -. 14. laserpitiifolium. 
Fronds bipinnate pa 25. 
25. Fronds including stipes ics 1 ‘toot long 15. coenobiale. 
ronds t lon à T4 26. 
14 to 6 fee 
26. Fronds tripinnatifid — ... 2 quae 29. 
Fronds not tripinnatifid a ae 27. 
