2 SYNOPTICAL KEY. 



Division 1. POLYPETAL JE. 



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 Rauunculaceae. 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 Actxa 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 Papaveracea* . 



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

 cell-walls. 



^ Capsule many-celled, indehiscent : sepals and petals persistent. 



3 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. 



4 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 Fumariaceap. 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. 



-- -**- Seeds without albumen; flowers regular. 



7 Crnciferae. 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. 

 S ( apparidacea . 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 placenta'. 



++ Flowers irregular. 

 <; Violacea'. Sepals and petals 5: anthers 5, coherent : style 1, clavate : 

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

 stipulate leaves. 



