lye 



1.— OROXYLUM. 



1. 0. indicum, Vent. ; Clarke in Hook. f. Fl. Brit. Ind. iv. 378. 

 Behind the Buddhist Temple, Causeway Bay, Hongkong ; 

 at Hahang, Hongkong New Territory. Fl. purplish, 

 September. 



3.— TEOOMA. 



1. T. grandiflora, Loisel. Herb. Amat. v. 185. Woods near 

 Canton. Fl. rose, . 



3.— STEREOSPERMUM. 



1. S. sinieum, Hance in Journ. Bot. 1882, 16. North River. Fl. 

 sulphur-coloured, June, 



PEDALINACEAB. 



1.— SESAMUM. 



S. indicum, Linn ; Clarke in Hook. f. Fl. Brit. Ind. iv. 387. 

 In waste places at Sheko, Hongkong ; Lekun, Hongkong 

 New Territory ; Hoifung ; Sanning. Fl. pink and yellow, 

 June — September, 



ACANTHACEAE. 



Key to genera. 



1. Climbing plant .., 



Erect or decumbent herb or shrub ... 



2. Corolla lobes contorted in bud 

 Corolla lobes imbricated in bud 



3. CoroUa 2-lipped; stamens 4 ... 

 CoroUa subequally 5 - lobed, lobes 



spreading ... 



4. Ovules 6 or more in each cell ; stamens 4 

 Ovules 2 in each cell ; stamens 4 or 2 



5. Flowers axillary or paniculate 

 Flowers in short terminal spikes 

 Flowers in dense terminal spikes 

 Flowers scattered 

 Corolla lobes 5, nearly equal ... 

 Corolla one- or two-lipped 

 CoroUa with long tube and spreading 



lobes 



CoroUa campanulate, with short tube ... 

 9. Bracts large spiny 



Bracts inconspicuous ... 



CoroUa expanded into a single large lip 



CoroUa two-Upped ... ... 



Stamens 4; flowers in dense hairy spikes 

 Stamens 2 • ... ,,. "* ... 



6. 



8 



lO 



11 



1. Thunbergia. 

 2. 

 3. 

 7. 



3. Hygrophila. 



4. 

 5. 

 6. 



6. Hemigraphis. 



4. Ruellia. 



5. Daedalacanthus. 



7. Strobilanthes, 



8. 

 10. 



9. 

 16. 

 9. Barleria. 

 10. Asy stasia. 



8. Acanthus, 



11. 



12. LepidagathU. 



12. 



