173 



13.-DIS0HIDIA. 



1. D. chinensis, Champ. ; Benth. Fl. Hongk. 228. Mt. Nicholson 

 and at the east end of the island, Hongkong ; Lantao 

 Island, Hongkong New Territory. Fl. white. May. 



14.- OEROPEGIA. 



1. C. trichantha, Ilcmd. in Journ. Bot. 1885, 286. Cape d'Aguilar, 



Hongkong. 



Fl. spotted red, October and November. 



LOGANIACEAE. 



Key to genera. 



1. Small herb 

 Shrub or tree ... 



2. Flowers pedicellate 

 Flowers sessile ... 



3. Stem sheathed at the nodes 

 Stem naked 



4. Flowers large, yellow ... 

 Flowers small, white ... 



2. Mitrasacme. 



2. 



3. Buddleia. 



3. 

 5. Gaertiiera. 



4. 

 1 . Gelsemium. 



4. Strychnos. 



1.— GELSEMIUM. 



1. G. elegans, Benth. Fl. Hongk. 229. Mt. Gough, Aberdeen 

 New Road and south of W anchai Gap, Hongkong ; 

 Kanghau, Hongkong New Territory ; Lienchow River ; 

 Namkong River. Fl. yellow, December. 



2.— MITRASACME. 



Key to species. 



1. Flowers in fascicles of 1-3 in upper 



axils... 1. alsinoides. 



Flowers umbellate ... ... ... 2. 



2. Leaves elliptic, mostly radical ; calyx 



^Jg inch long 2. nudicauUs. 



Leaves oblong, scattered ; calyx ]r-^ 



inch long ?>. polymorpha. 



1. M. alsinoides, R. Br. ; Clarke in Hook. f. Fl. Brit. Ind. iv. 



80. Taimoshan' at 1500 ft., Hongkong New Territory • 

 Swatow. Fl. white, February. 



2. M. nudicaulis, Reinw. ; Benth. Fl. Hongk. 230. Hono'kono' 



without locality ; Kwangtung without locality. Fl. white 

 October. 



3. M. polymorpha, R. Br. ; M. capillaris, Wall. ; Benth. Fl. 



Hongk. 230. On roadsides and in stony places, Hono-J 

 kong ; Lantao Island and near Lowu, Hongkono- New 

 Territory ; Pakhoi. Fl. white, June —September." 



