KEY TO THE FAMILIES 



IX 



Pistils several, or when 1 not becoming a 



drupe. 

 Pistil 1, becoming a drupe. 

 Stamens 5-10. 

 Fruit a legume. 

 Fruit not a legume. 

 Calyx campanulate. 

 Calyx tubular. 



ROSACEAE, 177. 



Amygdalaceae, 185. 



MiMOSACEAE, 186. 



Saxifragaceae, 169. 

 Lythraceae, 230. 



Trees and shrubs. 



Ovary ififerior. 



Stamensexceeding the petals in number; fruit a pome. Malaceae, 183. 

 Stamens as many as petals. 



Stamens opposite the petals. Rhamnaceae, 221. 



Stamens alternate with the petals. 



Leaves alternate; fruit a smooth or prickly 



berry. Grossulariaceae, 



Leaves opposite; fruit drupe-like. Cornaceae, 267, 



Herbs. 



172. 



Petals and stamens many; fleshy maritime herbs. 

 Petals 5 or fewer. 

 Style evident. 

 Style 1. 



Sepals and petals 4; capsule 4-celled. 

 Sepals and petals 5; capsule 1-celled. 

 Styles more than 1. 



Styles 4-5; fruit berry-like. 

 Styles 2; fruit dry, formed of 2 1-celled 

 carpels. 

 Style none; stigmas 4; aquatic plants. 

 Fleshy spiny plants, with jointed stems. 



Mesembrvanthemum, 127. 



Onagraceae, 240, 

 Loasaceae, 234. 



Araliaceae, 252. 



Ammiaceae, 253. 

 Haloragidaceae, 

 Cactaceae, 237. 



2SI. 



Series 2. SYMPETALAE. 



Petals united, at least below, except in Pyrolaceae, Plumhaginaceae 

 and Oleaceae. 



* Ovary superior. 



Corolla regular. 



Stamens free from the corolla; anthers opening by 

 pores. 

 Petals distinct or nearly so. 

 Petals united. 



Herbaceous saprophytes, without green foli- 

 age. 

 Trees and shrubs. 

 Stamens adnate to the corolla. 



Stamens opposite the corolla-lobes. 



Style 1 ; fruit capsular, many-seeded. 

 Styles 5; fruit utricular, 1 -seeded. 

 Stamens alternate with the corolla-lobes. 

 Ovaries 2, separate, becoming follicles. 

 Filaments distinct. 

 Filaments monadelphous. 

 Ovary 1, 



Cells to the ovary 1. 



Leaves opposite, entire. 

 Leaves mostly alternate, seldom entire. 

 Cells of the ovary 2-4. 

 Corolla not scarious. 

 Ovary not lobed. 

 Ovary 2-celled. 

 Leafy plants. 



Pyrolaceae, 269. 



Monotropaceae, 271. 

 Ericaceae, 271. 



Primulaceae, 275. 

 Plumbaginaceae, 277. 



Apocynaceae, 279. 

 Asclepiadaceae, 280. 



Gentianaceae, 278. 

 Hydrophyllaceae, 293. 



