346 



5. A. laserpitiifolium, Mett. ; Hook, et Bak. 1. c. 254. Lofoushan. 



6. A. varium, Swartz ; Hook, et Bak. 1. c. 254. Mt. Gough, Mt. 



Victoria, and elsewhere, Hongkong ; Lantao Island, 

 Shingmun, Pakmong and elsewhere, Hongkong New 

 Territory ; hOl near Chaochaufu ; Lienchow River. 



aristatum, Swartz. ; Hook, et Bak. 1. c. 255. Happy 

 Valley woods. Little Hongkong and Mt. Nicholson, 

 Hongkong ; Mirs Bay, Hongkong New Territory ; river 

 bank near Chaochaufu. 



falcatum, Swartz ; Hook, et Bak. 1. c. 257. Near Taitam 

 Bay and Tailungwan, Hongkong ; Waglan Island, Hong- 

 kong New Territory ; top of the Phoenix Mt., Swatow ; 

 N. Eiver. 

 9. A. membranaceum, Hook. ; Hook, et Bak. 1. c. 259. Hongkong 

 without locality ; Lienchow Eiver ; North Eiver ; West 

 Eiver, 



7. A. 



8. A. 



20.— NEPHRODIUM. 

 Key to species. 



1. Fronds pinnatifid 



Fronds once or more pinnate ... 



2. Pinnae f to 2 inches long 



Pinnae 6 inches long or more... 



3. Fronds once pinnate ... 



Fronds more than once pinnate at least 

 at the base ... 



4. Pinnae lobed or pinnatifid 

 Pinnae serrate or crenate 



5. Pinnae deeply pinnatifid 



Pinnae cut halfway down to the rachis 



6. Veinlets forked 

 Veinlets never forked ... 



7. Lobes oblong, entire ... 

 Lobes lanceolate, subcrenate ... 



8. Lower veinlets of contiguous groups 



free 



Lower veinlets of contiguous groups 

 united 



9. Pinnae 4 to 8 inches long ; veinlets 



10 to 15 on each side 

 Pinnae 2 to 4 inches long ; veinlets 

 3 to 6 on each side 



10. Pinnae abruptly reduced below 

 Lower pinnae rather shorter than the 



others 



11. Pinnae serrate ; veinlets of contiguous 



groups united 

 Pinnae crenate (some entire) ; veinlets 

 of contiguous groups free... 



2. 



3. 

 1, decursivopinna- 

 tum. 

 28. decurrens. 

 4. 



18. 



5. 

 11. 



6. 



8. 

 8. Thelypteris. 



7. 



4. gracilescens. 



5. repentulum. 



9. 

 10. 

 7. prolixum. 



6. calcaratum. 

 25, heterocarpon. 



24. molle. 



13, 



12. 



