SCR0PRULARIACE2E. 137 



Stamens 4 with perfeot anthers i — 



Calyx winged or keeled, mouth 

 oblique 12. Tobenia. 



Calyx not winged or keeled, 

 segments equal . . .13. Vandellia. 



The 2 upper stamens only with 

 perfect anthers, the two lower 

 reduced to staminodes and 

 inserted on corulla-throat : — 



Leaves with parallel veins, 

 staminodes bilobcd, capsule 

 ovate or shortly oblong . . 14. iLYsiNTHES. 



Leaves pinnate-veined, stami- 

 nodes entire, capsule linear- 

 oblong . ... 15. Bonn aya. 



Corolla small, tube very short, uniform, 

 stamens 2, anther-cells diverging at 

 the base, the tips confluent, capsule 

 loculicidal. — A minute glabrous 

 creeping herb 16. Glossostigma. 



■Corolla with the upper lip or the 2 upper 

 lobes innermost in bud or, if corolla- 

 lobes imbricate as in Scoparia, lobes 4 

 and stamens 4 : — 



Corolla-tube very short, subrotate, throat 

 narrow : — 



Corolla-lobes 4, sub-equal, imbricate, 



stamens 4, capsule septicidal . . 17. Scopa.bia. 



Corolla-lobes 4 or 5, unequal, one or 

 both the lateral outermost in bud, 

 stamens 2, capsule loculicidal. . 18. Veronica. 



Corolla- tube elongate (except in Sopu- 

 bia) ; lobes 5. the two upper inner- 

 most in bud ; stamens 4, didy- 

 namous, capsule loculicidal.— Plants 

 often parasitic or partially so :— 



Calyx tubular, 5-toothed or -fid : — 



Corolla-tabe straight or nearly so, 

 lobes subequal . . . .19. Buchnkba. 



Corolla-tube abruptly incurved at 

 or about the middle, the 2 upper 

 lobeB smaller . . . .20. Striga. 



