119 



S.— ACANTHOPANAX. 

 Key to species. 



1. Umbels terminal on the main branches ; 



petiole prickly ; leaflets usually 3, 



smooth above ... ... ... 1. aculeatum. 



Umbels terminal on short lateral shoots 

 or lateral ; petiole scarcely prickly ; 

 leaflets usually 5 ... ... ... 2. 



2. Umbels terminal on short lateral shoots; 



leaflets scabrous above 2. nodiflorum. 



Umbels lateral ; leaflets smooth above 3. spinosum. 



» 



1. A. aculeatum, Seem. ; Clarke in Hook. f. Fl. Brit. Ind. ii. 726. 



Hillside on southwest o£ Happy VaUey, Hongkong ; 

 Lantao Island and Plovers' Cove, Hongkong New 

 Territory ; Swatow ; in thickets near Canton ; Macao ; 

 Sanning ; Lienchow Eiver. Fl. white, August. 



2. A. nodiflorum, Dunn in Journ. Bot. 1909, 199. Lienchow 



River. Fl. white, August. 



3. A. spinosum, Miq. ; Aralia pentaphylla, Thunb. ; DC. Prodr, 



iv. 259. HiU near Chaochaufu. Fl. white, April. 



3.— HBPTAPLEURUM. 

 Key to species. 



Leaves glabrous beneath 

 Leaves tomentose beneath 



1. octophyllum. 



2, impressum. 



1. H. oetophyllum, Hance. ; Paratropia cantoniensis. Hook, et 



Am. ; Benth. Fl. Honk. 136. Common in Hongkong; at 

 Tin-tso-ngam, Hongkong New Territory ; hill near Chao- 

 chaufu ; Macao. Fl. white, November. 



2. H. impressum, Clarke in Hook. f. Fl. Brit. Ind. ii. 728. At 



Kwaisin, Hoifung. Fl. white, September. 



4.— DENDROPANAX. 



Key to species. 



1. Fruit elliptic, ribbed ; leaves reticulate 1. japonicum. 

 Fruit globose ; leaves not reticulate ... 2. 



2. Leaves all entire, 3-nerved ; flowers 



under 1 line long ... , 2. parviflorum. 



Some leaves trilobed ; flowers 1^ lines 



long 3. proteum, 



1. D. japonicum, Seem. ; Clarke 1. c. 733. Kwaisin, Hoifung ; 



Lofoushan. Fl. white, August. 



2. D. parviflorum, Benth. Fl. Honk. 137. Mt. Nicholson, Mt. 



Gough and Pokfulam, Hongkong. Fl. white, August. 



3. D. proteum, Benth. 1. c. 136. In the Happy V^alley woods, Mt. 



Gough and Mt. Victoria, Hongkong ; Lantao Island at 

 1000 ft., Hongkong New Territory ; Green Island, 

 Macao. Fl. white, September. 



