28 COMMON CANADIAN WILD PLANTS. 



ZANTIIOX'YLUM, Golden. PBICKIA" ASH. 



Z. America'nuin,-Mill. (NORTHERN PRICKLY ASH.) TOOTH- 

 ACHE TREE.) A prickly shrub, with yellowish-green flowers in 

 dense umbels in the axils. Sepals obsolete or none. Petals 5. 

 Stamens in the sterile flowers 5. Carpels 3-5, forming fleshy 1-2- 

 seeded pods. Fruit very pungent and aromatic. Leaves pinnate, 

 4-5 pairs, with an odd one at the end. Forming thickets in low 

 grounds along streams. 



ORDER XXV. ANAC ARDIA'CE^E . (CASHEW FAMILY. ) 



Trees or shrubs, with a milky or resinous juice, and alternate 

 leaves without dots or stipules. Sepals, petals, and stamens, 

 each 5. Fruit a 1 -seeded drupelet. The petals and stamens 

 inserted under the edge of a disk which surrounds the base of 

 the ovary. The only genus is 



RHUS, L. SUMACH. 



1. B. typh'ina, L. (STAGHORN SUMACH.) A small tree, 10-30 

 feet high, with densely soft-hairy branches and stalks. Flowers 

 greenish- white, polygamous, forming a terminal thyrse. Fruit 

 globular, covered with crimson hairs. Leaves pinnate, leaflets 

 11-31, oblong-lanceolate, serrate, pointed. Dry hill-sides. 



2. B. glabra, L., (SMOOTH S.) is smooth, and seldom exceeds 

 5 feet in height. 



3. B. Toxicoden'dron, L. (POISON IVY.) Shrub about a foot 



high, smooth, often climbing by rootlets. Leaves 3-foliolate, 

 leaflets rhombic-ovate, notched irregularly. Flowers polygamous, 

 in slender axillary panicles. Plant poisonous to the touch. Var. 

 radi'cans, L. has the leaves entire. 



4. B. venena'ta, DC. (PoisoN FJL.DER.) A tall shrub, smooth 

 or nearly so. Leaves odd-pinnate ; leaflets 7-13, obovate-obloug, 

 entire. Greenish- white flowers as in No. 3. Swamps. 



5. B. aromat'ica, Ait., (FRAGRANT S.) is a shrub 2-3 feet 

 high, with 3-foliolate leaves, sweet-scented when crushed, and 

 catkin-like spikes of pale yellow flowers appearing before the 

 leaves. Not common. 



