KEY. 117 



15. Seeds crested, borne on 2 thin placentae between the 

 two valves of tlie linear pod. Leaves pinnatitid, the lobes 

 irregularly toothed. Flowers yellow, in axillary peduncled 

 umbels. Chelidonium xnajus, L. 



Seeds crestless, partly sunk into a spongy false [)arti- 

 tiou between the valves of the very long and linear pod. 

 Leaves pinnatitid, or sinuate-lobed and toothed, the U])per ones 

 clas])ing by their cordate base. Flowers solitary, yellow. 

 Herb, glaucous. Glaucium luteum, Scop. 



16, Trees. Peduncle of each flower-cluster adnata to 

 the midrib of a large, leaf-like bract To 



Xo trees 17 



17. Leaves palmately compound, twice to thrice ternate. 

 Flowers Avhite, in oblong or much elongated racemes. Sepals 

 deciduous 18 



Leaves simple, or in one genus pitcher-form 19 



18, Petals spatulate, long-clawed, 4-8. Raceme short, 

 oblong. Fruit a berry, white or red. Actaea spicata, L 



Petals stamen-like, 2-horned at the apex, 1-8. Fruit 



a pod. Cimicifuga (45). 



10. Leaves hollow, pitcher-shaped. Scape naked, bearing 



a solitary puri)le or yellow flower. Sarracenia. 



Leaves not hollow 20 



SO. Sepals 3, with 2 bracts outside, or bractless 21 



Sepals 4-6 (or apparently 2). Petals either 4 or 



numerous 23 



21. Sepals 3, "with 2 bracts outside, and larger than they. 



Petals 5. Fruit a 3-valved capsule 22 



Sepals 3, with no bracts outside. Fruit a prickly 

 pod 13 



S2. Sepals united at the base. The 1-celled pod 3- to 6- 

 seeded. Low shrubs, much branched. Leaves awl- 

 shaped or thread-form, minute. Flowers small, yellow, along 

 the upper part of the branches. Hudsonia. 



Sepals not united at the base. The 1-celled pod 3- 

 valved, triangular. Flowers of 2 sorts; the primary, ter- 

 minal or dichotomal ones with large yellow petals and nu- 

 merous stamens ; the later, in axillary glomerules, with 

 small, or no petals, and only 3-10 stamens. Leaves lance- 

 oblong. Capsule with many seeds in the primary flowers, 

 and only few in the secondary ones. Helianthemum. 



