264 XCII. SCROPHULARIACE.E (HEMSLEY AND SKAN). 



Teibe VII. — Gratioleae. — Leaven {the lower at least) opposite. Corolla-tube 

 long or sometimes short, not saccate or spurred • limb nearly equally lobecl or 

 sometimes more or less 2-lipped ; lobes usually flat, the upper outside in bud 

 {except in Lindenbergia, in which the lower lip is outside). Perfect stamens 4 or 

 2 ; anther-cells distinct or subconflnent at the apex, rarely quite confluent. Capsule 

 2- or <h-valved. 



* Stamens 4, didynamous, or the upper pair only perfect, 

 the lower reduced to staminodes. 

 f Stamens all inserted in the corolla-tube ; lower 

 without appendages. 

 Calyx tubular or campanulate, 5-toothed or 5-fid. 

 Calyx tubular, 5-toothed; anther-cells con- 

 tiguous 18. MlMTIlTJS. 



Calyx campanulate, 5-fid; anther-cells separate, 



on a 2-brancbed connective . . .19. Lindenbergia. 



Calyx 5-partite or deeply 5-fid. 



Anther-cells confluent at the apex ; capsule 



turned downwards . . . .21. Stemodiopsis. 



Anther-cells distinct and separate ; capsule 

 not turned downward?. 

 Woolly or very glandular terrestrial plants; 



placentas 2, free or united, wingless . 20. Stemodia. 

 Glabrous aquatic or bog plants ; placentas 

 united into a column which is winged 

 on both sides after dehiscence . . 22. Limnophila. 



Anther-cells distinct but contiguous, not 

 confluent at the apex. 

 Perfect stamens 4 . , 23. Moniera. 



Perfect stamens 2 .... 24. Dop atrium. 



tt Upper stamens inserted in the corolla -tube; lower 

 stamens inserted at the throat, sometimes 

 perfect, usually with variously shaped 

 appendages at the base, or reduced to 

 staminodes. 

 Perfect stamens 4. 



Calyx 5-partite; segments broad, imbricate; 

 lower stamens with a scale-like appendage; 

 flowers large ..... 25. Artanema. 



Calyx 5-toothed or if 5-partite with the 

 segments narrow and not distinctly 

 imbricate ; lower stamens gibbous or 

 with a minute tooth-like or setaceous 

 appendage; flowers small. 

 Calyx tubular, plicate or winged, 3-5- 

 toothed or 2-lipped. 

 Calyx 5-toothed ; lower stamens dilated 



and sharply bent at the base, gibbous 26. Craterostigma. 

 Calyx slightly -2-lipped ; lower stamens 

 not sharply bent, with a tooth-like 

 or setaceous appendage . . . 27. Torenia. 



Calyx 5-partite, or if tubular not plicate or 



winged . .... 28. Lindernia. 



Perfect stamens 2 29. Ilysanthes. 



** Stamens 2-5 (scarcely didynamous when 4), the lower 

 pair always perfect, the upper either perfect, or 

 reduced to staminodes or quite absent. 



