3. Trillium. Sepals 3. Petals 3. Stig- 

 mas 3, almost sessile. 



4. Ly thrum. Calyx tubular, 8-12-dentate. 

 Petals 48. 



5. Trientalis. Calyx 6-7 cleft. Corolla 

 6-8 parted, spreading. Capsule 6-8- 

 valvcd, 1-celled. Placenta central. 



6. Frankeuia. Calyx tubular, 5-cleft. Pet- 

 als 5, unguiculate. Capsule 1-celled, de- 

 hiscent by valves. Ovules few, inserted 

 on parietal placentae. 



B. Floral parts incomplete. Perigonium corol- 

 line, gamosepalous. 



1. Muilla (Hespsroscordum) Perigonium 

 deeply 6-parted, campanulate. Stamens 

 inserted on the base of the perigonium. 



2. Broduea. Perigonium 6 lobed, fnnnel- 

 shaped. Stamens inserted on the throat, 

 alternately sterile. 



3. Triteleia. Perigonium 6-lobed, salver- 

 shaped. Stamens inserted alternately 

 on the throat and on the middle of the 

 tube, 



C. Florol parts incomplete. Perigonium corol- 



a. Style 3 -deft, or 3 sessile stigmas. 



1. Fritillaria. Sapals of perigonium with 

 a nectarium at the base. 



