LXXXVIL SCEOPHULAEIACE^. 261 



Anthers all alike, exserted ; bract adnate to 



the pedicel 19. Poltcaeena. 



Calyx subequally 5-fid ; anthers all alike, ex- 

 serted ; bract adnate to the pedicel . . .20. Phyllopodium. 

 Calyx 5-parted ; bracts free from pedicel. 



Corolla subrotate, with a very short tube . .21. Sphenandea. 

 Corolla not rotate ; somewhat funnel- or sal- 

 ver-shaped. 

 Corolla-tube dilated in the throat, short or 



long 22. Ch-ENOSTOMA. 



Corolla viscid, tube incurved or gibbous at 



the apex 23. Ltpeeia. 



Corolla-tube straight, not dilated in the 



throat 24. Manulea. 



Anthers 2-celled. 



All the stamens inserted in the corolla-tube ; 

 calyx 5-parted, the back segments larger ; 



stamens 4, perfect 25. HeepestiS. 



The anterior stamens inserted in the throat of the 

 corolla, either sterile or toothed at base. 

 Calyx tubular, obliquely 5-toothed ; anterior 



stamens antheriferous, arched 26. TOEENIA. 



Calyx 5-parted ; anterior stamens reduced to 



unequally 2-lobed rudiments 27. Iltsanthes. 



Suborder 2. Rhinanthidese. Corolla imbricate in aestivation, the back 

 lobe never outermost in bu.d. 



* Flowers axillary, solitary or fascicled, rarely cymose. 

 Tribe 6. Sibthoepie.-e. Leaves alternate or with the flowers tufted at 

 the nodes, rarely opposite, not connate ; floral leaves either similar or the 

 upper smaller. 



Creeping or aquatic herbs. 



Calyx 3-lobed ; corolla minute, 5-fid ; anthers 2- 



celled 28. Glossostigma. 



Calyx 5-toothed ; corolla rotate-bellshaped, 5-fid ; 



anthers 1-celled 29. Limosella. 



Erect herbs or landershrubs. 



Corolla tubular, limb 5-lobed, sub-2-labiate ; an- 

 thers 1-celled 30. Camptoloma. 



Corolla rotate. 4-fid ; anthers 2-celled . . . .31. Scopaeia. 



** Inflorescence racemose, centripetal. 



Tribe 7. Yeeonice^. Stamens 2 (or 4 distant) ; anthers 2-celled. 



Corolla subequally 4-fid, with a short tube and 



spreading limb 32. Yeeonica. 



Tribe 8. Buchneee^. Stamens 4, approaching in pairs ; anthers 1- 

 celled. 



Calyx tubular or bell-shaped, 5-fid or toothed. 

 Capsule straight, dry ; limb of coroUa shoi't. 



Corolla-limb subequally 5-fid 33. BuCHNEEA. 



Corolla-tube incurved, limb 2-labiate, spreading 34. Steiga. 

 Capsule straight, fleshy ; limb of corolla very 

 large ; calyx-tube long, 5-toothed 35. CrcKiUM. 



