ANACARDIACE^ 



nearly glabrous, deep glossy green above, whitish beneath, 2-4 ins. long. 

 Autumn tint rich red. 



A deciduous shrub or small tree, 12-18 ft. ; Branches glabrous. 



Introduced from N. America, 172G. 



POISON IVY, Rhus Toxicodendron. 



Gardens. Well adapted for growing over low walls or stumps, but requires 

 very careful handling. Contact between any portion of the plant and the bare 

 skin causes poisoning, the parts affected becoming greatly swollen and inflamed ; 

 some persons appear to be immune, but others are affected even by walking 

 near the plant. June. 



Flowers greenish-yellow, in a loose, slender, axillary panicle, 1-3 ins. long ; 

 Calyx 5-partite ; Petals 5, elliptical ; Stamens 5 ; Ovary superior, ovoid, styles 

 3 ; Fruit a drupe, red. 



Leaves alternate, leaflets 3, rhombic-ovate, 1-4 ins. long, acute, notched, 

 sinuate or lobed, downy beneath. Autumn tint purplish-red. 



A deciduous twining 1 shrub, climbing by adventitious rootlets over rocks and 

 stones ; sometimes erect and bushy. 



Native of N. America and Japan; introduced 1640. Also called Poison Oak. 

 The generic name is from lihous, the old Greek name used by Theophrastus ; 

 specific name from Greek toxicon, poison, and dendron, a tree. Syn. R. 

 radicans. Known also in gardens as Ampelopsis japonica and A. Hoggii. 



STAGHORN SUMACH, Rhus typkina. 



Gardens, shrubberies. This is the species most frequently seen in gardens, 



and is a very handsome plant in autumn. The young shoots are always 



hairy, and their curious appearance has given the plant its common name. 



If cut back and reduced to one or two shoots in the spring, the plant will 



produce immense leaves, giving a splendid effect in autumn. June. 



Flowers greenish-yellow, polygamous, small ; Males — Calyx 5-partite, 



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