AcanthacecB. 



287 



Elytraria. 

 Ebermaiera. 



striking exception occurs in our largest genus, Strobilaiithes, 1 8 out of its 

 28 species being found only in the hills, whilst, of the 5 which are con- 

 fined to the low country, 2 only occur in the dry districts. 



Stems twining : sap. 12-20, toothlike . . .1. Thunbergia, 

 Stems not twining ; sep. 4 or 5. 



Ovules numerous in 2 rows in each cell, no 

 retinacula. 



Cal.-segm. 4; stam. 2 2. 



Cal.-segm. 5 ; stam. 4 3. 



Ovules 3-12 or 2 in each cell, seeds with 

 retinacula. 

 Ovules 3-12 in each cell ; capsule 6- or more 

 seeded. 

 Cor.-lobes contorted in bud. 

 Cor. distinctly 2-lipped. 



Fl. small ; retinacula minute, straight 4. 

 Fl. large; retinacula long, slightly 



curved . . . . • 5- 

 Cor.-lobes nearly equal. 



Capsule clavate, with a solid base . 7. 

 Capsule oblong, without a solid base . 10. 

 Cor.-lobes imbricate in bud. 



Seeds not compressed . . . .18. 

 Seeds much compressed . . .19- 



Ovules 2 in each cell; capsule 4- or fewer 

 seeded. 

 Cor.-lobes contorted in bud. 

 Stam. 4. 



Cal.-segm. equal 6. 



One cal.-segm. much largest . . 8. 

 Stam. 2 ; cor.-tube very long, linear . 9. 

 Stam. 2 or 4 ; cor.-tube campanulate 

 above ..... 

 Cor.-lobes imbricate in bud. 

 Cor.-lobes nearly equal. 

 Stam. 4. 



Bracts large; cor. split down back . 15. 

 Bracts inconspicuous; cor. not split 16. 

 Perfect stam. 2. 



Sep. 4 in opp. pairs . . . .14. 



Sep. 5 17. 



Cor. distinctly 2-lipped. 



Stam. 4 20. 



Stam. 2. 



Anth. i-celled 21. 



Anth. 2-celled. 



Placentas not separating from 

 capsule. 

 Anth. -cells more or less super- 

 posed. 

 Anth. spurred at base . . 22. 

 Anth. pointed at base . . 23. 

 Anth. blunt at base . . 24. 



Cardanthera. 

 Hygrophila. 



RUELLIA. 



Stenosiphonium. 



Andrographis. 

 Gymnostachyum. 



Calophanes. 



Phaylopsis. 



d^dalacanthus. 



II. Strobilanthes. 



Crossandra. 



asystasia. 



Barleria. 

 Eranthemum. 



Lepidagathis. 

 Monothecium. 



justicia. 



Adhatoda. 



Rhinacanthus. 



