Thunhergia.^ 



XCVIII. ACANTHACE.E (bURKILL). 



Leaves less than 1 in. long; corolla-tube 6-7 

 lin. long. 

 Anthers acute, glabrous . . . .13. 

 Anthers obtuse, fringed with hairs . . 14. 

 Leaves 2 in. long ; corolla-tube 1 in. long . 15. 

 Leaves stalked. 



Flowers 2-3 together between 2 large sessile 



leaves 16. 



Flowers solitary. 



Bracteoles not keeled 17. 



Bracteoles keeled. 



Petiole ^ in. long 18. 



Petiole 1 in. or more long, often winged. 

 Bracteoles pubescent. 

 Bracteoles 1^ in, long ; lobes of stigma 



nearly 3 lin. broad . . . .19. 

 Bracteoles 8-12 lin. long . . .20. 

 Bracteoles nearly 1^ in. long ; lobes of 

 stigma 1-1^ Jin. broad . . .21. 

 Bracteoles hispid, with tawny hairs, 



10-12 lin. long 22. 



tfLobes of the stigma firm, the lower deltoid; tube of the 

 corolla widening but little upwards. 

 Leaves sessile ...... 



Leaves stalked. 



Tube of corolla 4-7 in. lung. 



Anther-lobes rounded below . , . .24, 

 Anther-lobes acute below , . . . .25. 



Tube of corolla not more than 1^ in. long. 

 Leaves acute (in 27 sometimes rounded, mucro- 

 nate). 

 Leaves toothed along the margin . . .26. 

 Leaves with one tooth at the base . . .27. 

 Leaves obtuse. 



Leaves broadly ovate; flowers on long peduncles 28. 

 Leaves narrowly elliptical ; flowers on rather 

 short peduncles . . . . .29. 



ttfLobes of the stigma thin, equal or almost so, rounded 

 above and with acute angles at the sides. 

 Leaves usually hastate, nearly glabrous. 



Corolla-tube less than 1 in. long . . . .30. 



Corolla-tube more than 1 in. long . . .31. 



Leaves rounded or subcordate, below. 



Flowers on long peduncles 32. 



Flowers on very short peduncles . . . .33. 



tttfLobes of the stigma thin, crumpled. 



Leaves dentate . . . . . . .34. 



Leaves palmatipartite . . . . . .35. 



*Thunbergiopsi8 — Stigma funnel-shaped ; calyx truncate ; 

 herbs, usually erect. 

 Leaves stalked ; stem more or less hairy. 

 Leaves more or less ovate. 

 Leaves hastate. 



Peduncles attaining 4| in. in length . < .36. 



Peduncles l\ in. long 37. 



Leaves cordate. 



Leaves glabrous or with sparsely scattered hairs. 

 Bracteoles J in. long . , . , .38. 

 Bracteoles nearly 1 in. long . . . .39. 

 Leaves pilose on botli surface*. 



T. hrewerioides. 

 T. sericea. 

 T. Fischer i. 



2. fascicidata. 

 T. huiUensiv. 

 T. hirsuta. 



T. Gihsoni. 

 T. data. 



T. Brythrcece. 



T. Gregorii. 



23. T. Oycnium. 



T. gig ant ea. 

 T. guerheana. 



T. hamaia. 

 T. kirkiana. 



T. subalata. 



T. Hannivgtonii 



T. cynanchi folia. 

 T. armipotens. 



T. fragrans. 

 T. s ess ills. 



T. chrysops. 

 T. geraniijolia. 



T. Mechuicii. 



T. stuhlmanniana. 



T. cor data. 

 T. togoeuiis. 



