172 



in the Province of Hunan in 1904 and pressed in a book 

 measuring only 6 inches by 4, but which nevertheless 

 contained three species new to China and 24 new to the 

 province. 

 7. C. sublaneeolatum, Maxivi. ; Vincetoxicum sublanccolatum, 

 ilaxim. in Bull. Acad. Petersb. xxiii. 367. Laufa Mt., 

 Hoifung. Fl. yellow, September. 



7.— PENTASACME. 



1. P. Championi, Benth. Fl. Honglc 228. On rocks in water- 

 courses, Hongkong ; Lantao Island, Hongkong New 

 Territory. Fl. white, May. 



8.— TYLOPHORA. 



1. T. hispida, Decne. ; Benth. 1. c. 225. Common in Hongkong ; 

 Hahang, Hongkong New Territory. Fl. yellowish, May. 



9.— MARSDENIA. 



Key to species. 



Flowers in oblong bunches ... ... 1. tinctoria. 



Flowers in broad cymes ... ... 2. lachnostoma. 



1. M. tinctoria, R. Br. ; Benth. Fl. Hongk. 226. At Little 



Hongkong, Hongkong. Fl. yellowish, May. 



2. M. lachnostoma, Benth. Fl. Hongk. 226. North Point, and 



!Mt. Parker west, Hongkong. Fl. yellowish, July. 



10.— STEPHANOTIS. 



1. S. chinensis, Champ. ; Benth. Fl. Hongk. 227. In the Happy 

 Valley woods, Hongkong ; Lantao Island, Hongkong 

 New Territory. Fl. white, March— May. 



11.— DREGEA. 



1. D. volubilis, Benth. ; Hook. f. Fl. Brit. Ind. iv. 46. Little 

 Hongkong,' Hongkong. Fl. green, June. 



12.— HOYA. 



Key to species. 



Leaves penninerved ... ... ... ]. ((nniosa. 



Leaves 3-nerved 2. Pottsii. 



1. H. carnosa, R. Br. ; Benth. Fl. Hongk. 228. On rocks on Mt. 



Victoria, Hongkong ; Lantao Island and Maiinshan, 

 Hongkong New Territory. Fl. white. May. 



2. H. Pottsii, Traill ; DC. Prodr. viii. 638. Macao. Fl. pale 



yellow, . 



