KEY. 139 



157. Calyx, filled with a fleshy disk, which bears the 

 petals and stamens 158 



Calyx without a disk. Leaves quinate, digitate ; 

 leaflets oblong-lanceolate. Flower-clusters cymose ; tendrils 

 with a foot-like, adhesive expansion at the end. Petals con- 

 cave, thfck, expanding before they fall. 



Ampelopsis Virginica, Mx. 



158. The 5 petals cohering at the top, while they sepa- 

 rate at the base, and falling away unexpanded, resembling a 

 mitre. Flowers dioeciously polygamous, in a conipouud 

 thyrsus, the pedicels usually umbellate-clustered. Leaves 

 simple, rounded and cordate, often angularly lobed. 



Vitis, L. (857). 



The 5 petals expanding before, or when they fall 

 away. Flowers usually all perfect, in small panicles. Leaves 

 either cordate, and coai'sely toothed, or twice pinnate. Ten- 

 drils sometimes none. Cissus, L. 



159. Calyx and disk adherent to the base of the ovary, 

 tubular, separating transversely after flowering. Petals 

 hood-shaped. (Ceanothus) 288 



Calyx and disk perfectly free from the ovary. .160 



160. Petals small, short-clawed, notched, wrapped 

 around the short stamens 103 



Petals larger, as long as the calyx, entire. Drupe 

 with thin flesh, and a bony, 2-celled nut, dark purple. Leaves 

 ovate, repandly serrate. Flowers polygamous, in terminal 

 panicles. A glabrous, climbing shrub. 



Berchemia volubilis, D. C. 



161. Leaves alternate 162 



Leaves opposite, ovate-oblong, or oblong-lanceolate. 

 Disk flat. Pod 5-angled, 5-celled, 5-valved, rough- warty, 

 depressed, crimson, when ripe. Seeds with a scarlet aril. 



Euonymus Americanus, L. 



163. Pod oblong, 2-grooved, 2-celled, tipped with the 

 style (2 united styles), 2-parted, when ripe. Seeds several in 

 each cell. Flowers all perfect, white, in a terminal raceme. 

 Leaves oblong, pointed, minutely serrulate. 



Itea Virginica, L. 



