197 



12. Anthers 2-celled 13. 



Anthers 1-celled ; flowers in calyx-like 



involucres ... ... ... ... 17. Hypoestes. 



13. Anthers ceUs oblique, lower mucronate 



or spurred ... ... ... ... 15. 



Anther cells equal, one much below 



olher ... .. ... ... 14. 



14. Placentae elastic ... ... ... 16. Peristrophe. 



Placentae not elastic ... ... ... 15. Dicliptera. 



15. Dissepiment separating from valves ; 



flowers in cylindric or 4-sided spikes 14. Rungia. 

 Dissepiment persistently attached to 



valves ... ... ... ... 13. Justicia. 



16. Leaves in a basal rosette ... ... 2. Ebermaiera. 



Leaves scattered, without a basal rosette 1 1 . Codonacanthus. 



1.— THUNBERGIA. 

 Key to species. 



1. Leaves palmately lobed ... ... 1. grana 



Leaves cordate or hastate, entire ... 2. 



2. Flowers white ... ... ... ... 2. fragrans. 



Flowers yellow ... ... ... ... 3. alata. 



1. T grandiflora, Roxb. ; Benth. Fl. Hongk. 260. In a ravine at 



Chaiwan, Hongkong ; Lantao Island, Kowloon catchwater, 

 and Maonshan, Hongkong New Territory. Fl. blue, July. 



2. T. fragrans, Roxb. ; Clarke in Hook. f. Fl. Brit. Ind. iv. 390. 



Robinson Koad, Hongkong. Fl, pure white, June — Sep- 

 tember. 



3. T. alata, B(yer ; DC. Prodr. xi. 58. Very common on Mts. 



Victoria, Kellet and Gough, Hongkong ; Hoifung. Fl. 

 yellow, or yellow with a purple throat, March — October. 



2.— EBERMAIERA. 



1. E. concinnula, Hance in Journ. Bot. 1868, 300. Mossy rocks 

 near Saichushan ; by rivulets at Yit-hai, Han valley. Fl. 

 white, April. 



3,— HYGROPHILA. 



1. H. salicifolia, Nees ; Benth. Fl. Hongk. 261. Marshes, East 

 Point in a swamp. Little Hongkong and Wanchai, Hong- 

 kong ; Lantao Island, Kowloon Catchwater, Hongkong 

 New Territory ; Kwaisin and Hoifung ; common in shallow 

 water on banks of Canton River ; ditches at Whampoa. 

 Fl. light blue, September — February. 



4.— RUELLIA. 



Key to species. 



Flowers about ^ inch long ... .. 1. repens. 



Flowers about 1^ inches long ... ... 2. venusta. 



