30 A COMPENDIUM OF 
Shrubs or trees with opposite leaves. 
Fruit a pair of keys. Aceracez. 
Shrubs or trees with alternate leaves 
and deciduous stipules. Stamens on the 
throat of the calyx alternate on the lobes. 
Rhamnacez. 
Stamens on the bottom of the calyx. 
Urticacez. 
Style I; stigma 2-lobed. Fruit a key. 
Leaves pinnate. Fraxinus in Oleacez. 
Style or sessile stigma I, and simple. 
Calyx of 6-petal-like colored sepals: sta- 
mens 9-12; anthers opening by valves. 
Aromatic shrubs or trees.  Lauracez. 
Calyx in the sterile flowers of 3-5, green- 
ish sepals; stamens the same number. 
Flowers monoecious or dioecious, 
Urticacez. 
-B, Flowers, one or both Sorts, in aments or cat- 
kin-like heads, twining or dioecious herbs; 
Sertile flowers only in short aments. 
Humulus in Urticacez. 
Shrubby plants, parasitic on trees. Fruit 
a berry. Loranthacez. 
Trees or shrubs. Sterile flowers only in 
aments. Flowers monoecious, Leaves 
pinnate. Ovary and fruit without an in- 
volucre, Juglandacez. 
Nuts one or more ina 
Cupulifere. 
Leaves simple, 
cup, or involucre, 
