220 51. GENTIANACE^. 



Order LI. GENTIANACE^E. 



Cal. inferior, persistent. Cor. regular, 4 8-fid, hypogvnous, 

 marcescent ; aestivation imbricate-twisted. Stam. inserted on the 

 cor., as many as the segments. Ovary of 2 carpels with the edges 

 slightly indexed or meeting. Caps, or berry many-seeded, gene- 

 rally 2-valved. 



Subord. I. GENTIANE^E. Corolla twisted in aestivation. 

 L. opposite. 



* Style deciduous. 

 Tribe I. CHLORE^E. Corolla rotate. 



1. CHLORA. Cal. 8-parted. Cor. nearly rotate, 8-parted. 

 Stam. 8. Style 1. Stigma 2 4-cleft. Caps. 1-celled; pla- 

 centas on the inflexed margins of the valves. 



Tr. II. ERYTHR^EE^E. Corolla funnelshaped. 



2. ERYTHR^EA. Cal. 5-fid. Cor. funnelshaped, limb short 

 5-fid. Stam. 5. Anth. erect, at length spirally twisted. 

 Style simple, stigmas 2. Caps, imperfectly 2-celled from 

 the inflexed margins of the valves. 



3. CICENDIA. Cal. 4 -partite or lobed. Cor. funnelshaped, 

 limb short 4-fid. Stam. 4. Anth. erect, not twisted. 

 Stigma capitate, undivided. Caps. 1- or imperfectly 2-celled. 



** Style persistent or stigma sessile. 

 Tr. III. SWERTIEJE. Style often wanting, stigma persistent. 



4. GENTIANA. Cal. 4 5-cleft. Cor. funnel- or salver-shaped, 

 limb 4 5-cleft. Stam. 4 6. Stigmas 2. Caps. 1-celled, 

 seeds on the inflexed margins of the valves. 



Subord. II. MENYANTHIDE^E. Corolla induplicate in aesti- 

 vation. L. alternate. 



5. VILLARSIA. Cal. 5-parted. Cor. rotate, thin; limb 5- 

 parted, smooth on the disk, bearded or scaly at the base. 

 Stam. 5. Stigma with 2 toothed lobes. Caps. 1-celled with 

 sutural placentas, 2-valved (in our plant), not bursting. 



6. MENYANTHES. Cal. 6-parted. Cor. funnelshaped, fleshy ; 

 limb 5-parted, bearded internally, Stam. 5. Stigma capi- 

 tate. Caps. 1-celled, 2-valved; valves bearing the seeds 

 along their middle. 



