2 SYNOPTICAL KEY. 



DIVISION 1. POLYPETAL^E. 



Floral envelopes consisting usually of both calyx and corolla; 

 the petals distinct or rarely united with each other, sometimes 

 wanting . 



SYNOPTICAL KEY TO THE POLYPETALOUS ORDERS. 



1. Stamens hypogynous, free from the calyx and the super- 

 ior ovary. 



* Carpels solitary, or distinct. 



-*- Sepals and petals deciduous, rarely persistent in No. 1. Leaves 

 alternate or all radical, rarely opposite or whorled. 



1 K;i n ii ii riila <<'. Sepals 4 or more : petals as many and alternate with 



them or wanting : stamens usually numerous : carpels one to many : 

 fruit achenes or follicles, or in Acixa a berry. 



2 Berberidaceap. Parts of the flower in threes, in opposite ranks, distinct, 



(sepals and petals wanting in Achlys} : anthers opening by valves : car- 

 pel solitary, (a berry in Berberis). 



Sepals 3, petals 6, stamens many, carpels several, soon distinct, becoming 

 linear torulose several-seeded pods : Platystemon in Papaveracesp . 



* * Ovary compound with parietal placentae, or seeds covering the 

 cell-walls. 



+. Capsule many-celled, indehiecent : sepals and petals persistent. 



8 Nymphaeaceae. Parts of the flower indefinite, mostly numerous : seeds 

 numerous, covering the walls of the cells. Aquatic herbs with entire 

 plain leaves and solitary flowers. 



4r Sarraceniaceae. Sepals and petals 5. Acaulescent marsh perennials 

 with odd-shaped leaves and solitary flowers. 



-- -- Valves of the capsule separating from the persistent placentae. 

 Sepals and petals persistent. 



+* Seeds albuminous. 



5 Papaveraceae. Sepals 2 or 3, caducous : petals twice as many, alike : 



stamens numerous : capsule 2-several-valved, one- (rarely several) cell- 

 ed. Herbs, or shrubs with mostly alternate leaves without stipules, 

 and often colored juice. 



6 Fumariaceae. Flowers very irregular: sepals 2, small : petals 4, in 2 dis- 



similar pairs : stamens 6, diadelphous : capsule 1-celled, 2-valved, sev- 

 eral to many-seeded. Herbs with alternate leaves without stipules. 



++ -M- Seeds without albumen ; flowers regular. 



7 Cruciferae. Sepals and petals 4: stamens 6, tetradynamous (rarely 4 or 



2); capsule 2-celled, 2-valved, 2-many-seeded ; rarely 1-celled and inde- 

 hiscent. Herbs with alternate leaves without stipules. 



8 Capparidaceae. Sepals and petals 4 : stamens 6 or more, nearly equal : 



capsule 2-valved, 1-2-celled, 1-several -seeded. Mostly herbs with alter- 

 nate often stipulate leaves. 



----<- Capsule 1-celled, several-carpelled, the valves not separating 

 from the placentae. 



+- Flowers' irregular. 



6 Violaceae. Sepals and petals 5: anthers 5, coherent : style 1, clavate: 

 capsule 3-valved, many-seeded. Low herbs with alternate or radical 

 stipulate leaves. 



