140 



SAEEACENIACEAE. 



Family 2. SARRACENIACEAE. Pitcher-plant Family. 



Perennial bog herbs, living to some extent on decaying organic matter 

 which has fallen into the tubular or pitcher-like leaves. Flowers perfect, 

 nodding. Calyx of 5 persistent sepals, accompanied by 3 bracts. Corolla 

 of 5 deciduous petals. Androeeium of numerous stamens. Gynoecium of 

 5 united carpels. Fruit a 5-valved capsule. 



1. SARRACENIA [Tourn.] L. Acaulescent, green, yellow^ or purple, or 

 variegated plants. Leaves basal, erect or decumbent, with a ventral ridge and 

 a terminal hood. Flowers on erect scapes. Stigmas hooked, under the angles 

 of the umbrella-like expansion of the style. Pitcher-plant. Trumpet-leaf. 



1. S. purpurea L. Leaves 1-2 dm. long, ascending, green and often variegated 

 with purple; tube inflated, with a broad wing; hood reniform, often notched 

 at the apex: scapes 2-4 dm. tall: sepals ovate, about 3 cm. long: petals fiddle- 

 shaped, 4-5 cm. long^ purple: style-disk 3-4 cm. wide: capsule about 1.5 cm. 

 wide. — E. Eare, in sphagnous swamps. — Schists. — Sum. — Side-saddle 



FLOWER. 



Order ROSALES. 



Herbs, shrubs, or trees, or rarely aquatic plants, or vines. Leaves 

 with simple or compound blades. Flowers mostly perfect. Calyx and 

 corolla present and sometimes irregular, or the latter occasionally, or both 

 rarely, wanting. Androeeium of few or many stamens. Gynoecium of 

 1-several distinct or united carpels. Fruit various. 

 Aquatic alga-like fleshy herbs, with spathe-like involucres : perianth wanting. 



Pam. 1. PODOSTEMACEAE. 



Terrestrial or swamp plants, without spathe-like invo- 

 lucres : perianth present, except in Liqvidambar. 

 Endosperm present, usually copious and fleshy : stip- 

 ules mostly wanting. 

 Herbs. 



Carpels as many as the sepals : stamens as 



many as the sepals or twice as many. 



Plants succulent : carpels distinct or united 



at the base, opening lengthwise. Fam. 2. Sedaceae. 



Plants not succulent : carpels united to the 



middle, circumscissile. Fam. 3. Penthoeacbae. 



Carpels fewer than the sepals. Fam. 4. Saxifragaceae. 



Shrubs or trees. 



Leaves opposite. Fam. 5. Hxdrangeaceae. 



Leaves alternate. 



Fruit a 2-celled capsule. Fam. 6. Hamamelidaceae. 



Fruit a 1-celled berry. Fam. 7. Geossulakiaceae. 



Endosperm wanting or scant (copious in Opidastcr, 

 Rosaceae) : stipules mostly present. 

 Flowers monoecious, in dense capitate clusters. Fam. 8. Platanaceae. 

 Flowers perfect, or if monoecious or dioecious not 

 in capitate clusters. 

 Flowers regular. 



Carpels several or numerous, or if solitary 

 becoming an achene. 

 Carpels distinct, rarely adnate to the 



hypanthium : fruit achenes or follicles. Fam. 9. Rosaceae. 

 Carpels united, enclosed by the hypan- 

 thium and adnate to it : fruit a pome. Fam. 10. Malaceae. 

 Carpel solitary, not becoming an achene. 

 Ovary with 2 ovules : leaf-blades simple : 



fruit a drupe. Fam. 11. Amygdalaceae. 



Ovary with several ovules : leaf-blades 



2-3-pinnate : fruit a legume. Fam. 12. Cassiaceab. 



Flowers irregular (nearly or quite regular in 

 Oleditsia of the Cassiaceae). 

 Upper petal enclosed by tiie lateral ones in 



the bud. Fam. 12. Cassiaceae. 



Upper petal enclosing the lateral ones in 



the bud. Fam. 13. Fabaceae. 



