SIMAEUBACEAE. 



Key to genera. 



1. Leaves glabrous 

 Leaves velvety 



2. Fruits, winged samaras 

 Fruits, fleshy drupes .. 



2. 

 3. Brucea. 



1. Ailanthus. 



2. Picrasma. 



1.— AILANTHUS. 



Key to species. 



Leaflets entire ... ... ... ... 1. malabarica. 



Leaflets coarsely toothed at the base 2. glandvlosa. 



1. A. malabarica, DC. Prodr. ii. 89. Victoria Gap and Mt. 

 Gough, Hongkong ; Shatin, Hongkong New Territory. 



Cultivated. 



Fl. cream-coloured, October, 

 2. A. glandulosa, Desf. ; DC. Prodr. ii. 89. 



2.— PIORASMA. 



1. P. quassioides, Benn. ; Benth. Fl. Hongk. 61. On Mt. 

 Victoria and Mt. Parker, Hongkong. Fl. greenish, April. 



3.— BRUOEA. 



1. B. sumatrana, Roxb. ; Benth. Fl. Hongk. 60. Happy Valley and 

 elsewhere on edges of woods, Hongkong ; Taipo, Hong- 

 kong New Territory. Fl. purple, June. 



BURSERACEAE. 

 1.— OANARIUM. 



Key to species. 



Leaves scabrous beneath 

 Leaves smooth ... 



1. album. 



2. Pimela. 



1. C. album, Raeusch. ; DC. Prodr. ii. 80. Cultivated at Chao- 



chaufu and Whampoa. Fl. whitish, 



2. C. Pimela, Kon. ; DC. 1. c. 80. Naturalised in Hongkong ; 



cultivated at Whampoa, near Canton. Fl. white. May. 



2. 



MELIACEAE. 



Key to genera. 



Leaves bipinnate ... ... ... 1. Melia. 



Leaves pinnate ... ... ... ... 2. 



Leaflets 5 ... ... ... ... 3. Aglaia, 



Leaflets 8-30 3. 



Leaflets serrate ; fruit a capsule ... 4. Cedrela. 



Leaflets entire j fruit fleshy 2. Chisocheton, 



