334 



Sori not spread all over under 

 surface of fronds 



29. Sori round 



Sori oblong or reticulated 



30. Sori oblong 

 Sori reticulated 



31. Capsules with an incomplete ring 

 Capsules without a ring ... 



32. Aquatic annual 

 Perennial not aquatic 



33. Capsules 2-valved ; stems climbing 

 Capsules 2-valved ; stemanot climb- 

 ing 



Large plant ; fronds 6 ft. long or 



more ... 

 Small plant ; fronds under 1 foot 



34, 



long 



29. 

 23. Polypodium (p. 350). 



30. 

 27. Meniscium (p. 353). 

 30. Hemionitis (p. 354). 



32. 



34. 

 14. Ceratopteris (p. 341). 



33. 



33. Lygodium (p. 356). 



32. Osmunda (p. 355). 



34. Atigiopteris (p. 35')). 



35. Ophiotj/os.<iii.m(p.35l)). 



2. 



1.— GLEICHENIA. 



Kcj to species. 



Stipes copiously bipinnate 

 Stipes not bipinnate 



1. longissima. 



2. dichotoma. 



1. G. longissima, Bl. ; Hook, et Bak. Syn. Fil. 12. In Glenealy 



ravine, near Causeway Bay and in ravines on Mt. Nicholson, 

 Hongkong ; Taimoshan, Hongkong New Territory ; 

 Kwaisin, Hoifung ; stream near Chaochaufu, Swatow. 



2. Gr. dichotoma, Willd. ; Hook, et Bak. 1. c. 15. Abundant in 



Hongkong ; common in the Hongkong New Territory ; 

 hills near Chaochaufu, Swatow. 



2.— CYATHEA. 



1. C. spinulosa, fVall. ; Hook, et Bak. 1. c. 23. On bank above 

 Robinson Road, Hongkong ; Lantao Island, Hongkong- 

 New Territory ; Lienchow River ; Lofoushan ; E. River. 



3.— ALSOPHILA. 



Key to species. 



1. Fronds li ft. long 1. denticulata. 



Fronds much longer ... ... ... 2. 



Pinnules entire or serrate ... ... 3. podophylla. 



Pinnules deeply pinnatifid ... ... 2. tomentosa. 



1. A. denticulata, Bak. in Journ. Bot. 1885, 102. Taimoshan at 



2500 ft., Hongkong New Territory. 



2. A. tomentosa. Hook. ; Hook, et Bak. Syn. Fil. 42. Naturalised 



in the Glenealy ravine, Hongkong. 



3. A. podophylla, Hook. ; Hook, et Bak. 1. c. 43. Happy Valley, 



Washerman's Ravine, Foot of Victoria Peak, Mt. Gough, 

 Mt. Parker, and south of Sheko Gap, Saiwan. Hongkong ; 

 Maonshan and Taimoshan, Hongkong New Territory ; 

 near Swatow, 



