220 51. gentianacejE. 



Order LI. GENTIANACE^. 



Cal. inferior, persistent. Cor. regular, 4— S-fid, hypogvnous, 

 marcescent ; sestivation imbrieate-twisted. Stam. inserted on the 

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

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

 rally 2-valved. 



Subord. I. GENTIANE^. Corolla twisted in a;stivation. 

 L. opposite. 



* Style deciduous. 



Tribe I. CHLOREM. Corolla rotate. 



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

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

 centas on the iaflexed margins of the valves. 



Tr. 11. ERYTHR^E^. Corolla funnelshaped. 



2. Beythk«a. 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. SWERTIE^. 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. MENYANTHIDEj;. Corolla induphcate in esti- 

 vation. L. alternate. 



5. ViLLARSiA. Cal. 5-parted. Cor. rotate, thin; hmb 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. Mbnyanthes. 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. 



