255 

 3.— SALIX. 



Key to species. 



1. Leaves linear ... 

 Leaves ovate or lanceolate 



2. Leaves lanceolate, 2 inches long by 



i inch wide 

 Leaves broader 



3. Back of bracts glabrous 

 Back of bracts woolly ... 



1 . habylonica, 

 2. 



2. cantomensis. 

 3. 



3. Mesnyi. 



4. tetrasperma. 



1. S. babylonioa, Linn. ; DC. Prodr. xvi. ii. 212. Eiver bank 



near Chaochaufu. Fl. February. 



2. S. cantoniensis, Ilance ; DC. 1. c. 685. Canton Eiver. Fl. 



February. 



3. S. Mesnyi, Hance in Journ. Bot. 1882, 38. Canton ; Lienchow 



Eiver. Fl. January. 



4. S. tetrasperma, Roxb. ; Hook, f . Fl. Brit. Ind. v. 626. Muddy 



banks of the Canton Eiver ; Shekmun near Canton, Fl. 

 March. 



GYMNOSPERMAE. 



GNETACEAE. 



1.— GNETUM. 



1. G. seandens, Roxb. ; Benth. Fl. Hongk. 336. Little Hongkong 

 woods, Happy Valley, Mt. Victoria, and elsewhere, 

 Hongkong ; Taimoshan, Hongkong New Territory ; hill 

 near Chaochaufu. Fl. green, June. 



CONIFEEAE. 

 Key to genera. 



1. Leaves in pairs ... 

 Leaves distinct ... 



2. Leaves short, subulate. 

 Leaves flat 



3, Leaves needle-pointed ... 

 Leaves acute or blunt ... 



4, Leaves minutely serrate 

 Leaves quite entire 



5. Pinus. 

 2. 



1. Glyptostrobus. 



3. 

 4. 



3. Podocarpus. 



4. Cunninghamia 



2. Cephalotaxus. 



1. -GLYPTOSTROBUS. 



1. G. heterophyllus, Endl. ; DC. Prodr. xvi. il. 439. Hatsun, 

 and between Taipo and Fanling, Hongkong New Terri- 

 tory ; Canton. Fl. . 



