37 



BIXACEAE. 



Key to genera. 



Flowers hermaphodite ... 1. Scolopia. 



Flowers dioecious ... ... ... 2. Xylosma. 



1.— SCOLOPIA. 



1. S. crenata, Clos. ; S. chinensis, Benth. Fl. Hongk. 19. Com- 

 mon in Hongkong ; Lantao and Ma-onshan, Hongkong 

 New Territory ; Swatow ; Hoifung ; Ngtungshan, .near 

 Hongkong. Fl. white, August. 



2.— XYLOSMA. 

 Key to species. 



1. Leaves 2 inches or more ... ... 2. 



Leaves under 1 inch ... ... ... 1. senticosum. 



2. Leaves glabrous below ... ... 2. racemosum. 



Leaves pubescent below ... ... 3. controversv.m. 



1. X. senticosum, Hance in Journ. Bot. 1868, 328. Victoria 



Peak, Hongkong ; Swatow. Fl. white, June. 



2. X. racemosum, Miq. in Ann. Mus. Bot. Lugd. Bat. ii. 155. 



Lienchow River and Canton. Fl. white, August. 



3. X. controversum, Clos.; Hook. f. Fl. Brit. Ind. i. 194. Lien- 



chow River. Fl. white, summer. 



PITTOSPORACEAE. 



1.— PITTOSPORUM. 

 Key to species. 



1. Capsule 3-valved ... ... ... 1. glabrata. 



Capsule 2-valved ... ... ... 2. 



2. Leaves rounded at the top ... ... 2. Tobira. 



Leaves acuminate ... ... ... B. pauci/iorum. 



1. P. glabratum, Lindl. ; Benth. Fl. Hongk, 19. Common in 



shady woods in Hongkong ; Tintao-ngam, Ma-onshan and 

 Shatin Road, Hongkong New Territory ; Phoenix 

 Mountain, Swatow. Fl. cream-coloured, April. 



2. P. Tobira, Ait. ; Bot. Mag. t. 1396. Hillside and in a small 



wood near Swatow. Fl. yellow, April. 



3. P. pauciflorum, Hook, et Am. Bot. Beech. Voy. 259. 



Lienchow River. Fl. yellow, April. 



POLYGALACEAE. 



Key to genera. 



1. Climbing shrub 3. Securidaca. 



Erect shrub or herb 2, 



