16 SYNOPSIS OF ORDERS AND GENERA. 



Ordek XVII. RHAMNACE^. 



Trees and shrubs. Flowers small, in axillary clusters, perfect, reg- 

 ular, parts 4-5, frequently without petals. Fruit a 1-seeded capsule. 



Leaves opposite or alternate. Calyx pitcher-shaped, or 4-5-cleft. Petals 

 notched, sometimes wanting. Yellow berries. 



Buckthorn, Rhamnus. 

 Leaves ovate, acuminate, serrate, pubescent beneath, alternate and stipulate. 

 Calyx a semi-globular tube, with 5 segments. Petals clawed, rolled in at the 

 edges. Stamens witli ovate 2-celled anthers. Styles 3. Stigmas diverging. 

 Fruit 3-berried. 



New Jersey Tea, Ceanothus. 



Order XVIII. AMPELIDE^. 



A woody vine. Flowers, in compound panicles, green, and opposite 

 the leaves. Stem climbing by tendrils. Fruit globular or elliptical, a 

 pulpy berry, with 4-5 seeds. 



Leaves simple, alternate, stipuled, palmately veined. Tendrils opposite 

 leaves. Calyx small, 5-tootlied. Petals 5. Stamens 5. Stigma sessile. 



Grape, Vitis. 



Order XIX. SAPINDACE^. 



Trees and shrubs. Flowers polygamous or dioecious. Petals some- 

 times wanting. Ovary 2-lobed and 2-celled, 2 ovules in a cell, maturing 

 one seed in a cell. Fruit with 2 diverging wings. 



Leaves opposite, lobed. Lobes toothed or cut. Calyx 5-parted. Petals 5 

 or 4-12. Stamens 4-12. Anthers 2-lobed. 



Maple, Acer. 



Order XX. ANACARDIACE^. 



Trees and shrubs. Flowers perfect, dioecious or monoecious, regular, 

 small, in spikes or panicles. Ovary 1-celled. Fruit a little globose 

 or kidney-shaped drupe. 



Leaves alternate, simple or compound, with 8-15 pairs of sessile leaflets and 

 a terminal one whicli is petioled, all dark above, light below. Calyx with 5 

 small persistent sepals. Petals 5, ovate, spreading. Stamens .5-10 or none. 

 Styles 3, sometimes united. 



Sumach, Rhus. 



Leaves elliptical, green, leathery, alternate, obcordate, or deeply emarginate. 

 Calvx 5-toothed. Corolla 5-parte(l. Stamens 5. Styles 3. 



Cashew Nut, Anacardium. 



Order XXI. LEGUMINOS^. 



Herbs, shrubs, and trees. Flowers regular or irregular, perfect 

 (usually axillary). Ovary superior, single. Fruit a legume. Seeu 

 Hat, kidney-shaped, or globular, with large embryo and no endosperm. 



Leaves compound, bluish green, with a])Out 6 leaflets, and a terminal one. 

 Calyx 5 acute segments. Petals 5 ; .standard roundish, and emarginate ; keel 



