48 SAPLNDACE^E. (SOAPBEKKY FAMILY.) 



Order 22. VITACE^I. (Vine Family.) 



Woody plants, mostly climbing by tendrils, branchlets articulated and 

 eften thickened at the nodes, usually palmately veined or lobed or com- 

 pound alternate leaves, panicled cymose or thyreoid inflorescence, small 

 greenish or whitish flowers, and fruit a berry. — Flowers very commonly 

 polygamous or dioecious. Calyx minute, truncate, or 4 to 5-toothed, 

 caducous or early deciduous. Petals 4 or 5, valvate. Stamens the same 

 number and opposite. Ovules in pairs or solitary in the cells of the 

 ovary. 



1- Vitis. Cdyx lilh-rl with an adnate fleshy disk which bears the petals and stamens. 



Lr;iws simple. i 

 2. Ampelopsis. Disk none. Leaves palmately compound. 



1. VITIS, Tourn. Grape. 



Petals thick and caducous. Stamens distinct. Ovary 2-celled, with a pair 

 of ovules in each cell. — Tendrils and flower-clusters opposite the leaves, the 

 former almost always at least once forked. 



I. V. riparia, Michx. Leaves usually iucisely 3-lobed, the lobes long- 

 pointed : panicles small, rather simple : berries mostly with bloom : seeds 

 obtuse or somewhat obcordate and with an inconspicuous rhaphe. — V. cordi- 

 folia, var. riparia, Gray. Colorado ; common in the Atlantic States. 



2. AMPELOPSIS, Michx. Virginia Creeper. 



Calyx slightly 5-toothed. Petals concave, thick, expanding before the fall. 

 — Leaves with 5 oblong-lanceolate sparingly serrate leaflets. Tendrils fixing 

 themselves to trunks or walls by dilated sucker-like disks at their tips. 



1. A. quinquefolia, Michx. A woody vine in low rich grounds, climb- 

 ing extensively, sometimes by rootlets as well as by its disk-bearing tendrils: 

 berries small aud blackish. — Colorado (ileehan), and throughout the At- 

 lantic and Mississippi Valley States. Leaves turning bright crimson in 

 autumn. 



Order 23. SAPIND4CEJE. (Soapberry Family.) 



Ours are all trees of the Maple Family, which has compound or lobed 

 apposite leaves without stipules, polygamous or dioecious regular flowers, 

 sometimes without petals, each cell of the 2-celled fruit producing a 

 wing and becoming a samara. 



1. Acer. Leaves palmately lobed or rarely divided. Flowers polygnmous. 



2. Negundo. Leaves pinnate. Flowers Uioecious, apetalous. 



