1 ANALYTICAL KEY. 



Perianth 4- or 5-lobcd. Stamens alternate with the 



lobes or twice as many. Ovules 1 or 2 . . . . ThymelEjE, p. 295. 

 Perianth 5-lobed. Stamens 8, alternating with as 



many scales. Placentas 3, parietal Case ami a, p. 121. 



Sepals 3 to 5, free. 



Ovary 2-lobed at the top Distylium, p. 133. 



Ovary entire. Fruit 1-seeded ITetice^:, p. 323. 



Flowers wholly unisexual. 



Leaflets succulent, root parasite Balanopuoea, p. 140. 



Climbers, with tendrils . CucuEBiTACEiE,p.l23. 



Trees, shrubs, or herbs. Perianth herbaceous or none. 

 No ovary. Ovule bare or in an open perianth. 



Ovule in the females or stamens in the males en- 

 closed in an ovoid perianth. Leaves opposite . Gnetum, p. 336. 

 Ovules and seeds in pairs under the scales of a 

 cone. Leaves alternate, or clustered and subu- 

 late Conifee^:, p. 336. 



Ovary 1-celled, or if 2-celled, with 1 ovule in each cell. 

 No perianth, at least in the female. 



Female flowers forming a prickly 2-celled burr, 



with 2 conical points and styles Xanthium, p. 181. 



Flowers minute, crowded inside or outside of 



succulent receptacles UeticEjE, p. 323. 



Flowers crowded in cylindrical leaf-opposed pe- 

 dunculate spikes Chavica, p. 335. 



Flowers in catkins t . . . Mybica, p. 322. 



Perianth herbaceous. 



Stigma 3- to 5-lobed. Shrubs. 



Leaves alternate. Flowers in spikes or catkins . Antidesma, p. 317. 

 Leaves opposite. Flowers in axillary clusters . Hekslowia, p. 299. 

 Style entire or 2-lobed. 



Fruit 1-seeded TJbtice^;, p. 323. 



Fruit of 2 cells or cocci Euphoebiace^;, p. 299. 



Ovary 2-celled, with several ovules in each cell. 



Flowers in globular or ovoid heads. Tree . . . Liqttidambae, p. 131. 

 Ovary 3- or more celled, or if 2-celled, with 2 ovules 

 in each. 

 Ovary 5-lobed. Fruit follicular. Trees with pani- 

 culate flowers Steecttliace-E, p. 35. 



Ovary usually 3-celled, rarely 2- or several-celled. 

 Fruit dividing into cocci or baccate. Herbs, 



shrubs, or trees. Seeds albuminous .... Euphoebiace^;, p. 299. 

 Ovary 2-celled. Fruit a 1-seeded nut, on a cup or in 



a capsule-like involucre. Trees. No albumen . Amentace^e, p. 319. 



CLASS II. MONOCOTYLEDONS. 



(See p. 338.) 

 Stem woody. 



Leaves pinnate or digitate. Perianth double . . . . . Palm.e, p. 339. 

 Leaves simple. No perianth. 



Leaves prickly on the edges, in spiral rows Pandane^e, p. 310. 



Leaves not prickly and not spiral Geamine^:, p. 403. 



Stem herbaceous or none. 



Perianth none or of 1 to 6 small scales not longer than the ovary. 

 Flowers singly sessile within imbricated scales or glumes. 

 Leaf-sheaths entire. Each flower usually in the axil of 

 one glume without a palea . CYPEEACEiE, p. 383. 



