134 WOODY PLANTS 



to Illinois, south to Florida and Texas (Fig. 178). | 



4. R. aromatica Ait. Aromatic Sumac (R . canadensis Marsh. ). 

 A straggfing fragrant shrub 1-2 m. high, with ascending or diffuse 

 branches; twigs pubescent; buds small, yellow, hairy, covered by 

 the leaf-scars; fruits globose, covered with long soft red hairs. 

 Dry soil, Quebec to Illinois and Nebraska, south to Florida and 

 Texas (Fig. 179). 



5. R. vernix L. Poison Sumac . ( Toxicodendron vernix Ktze.)L 

 Shrub or small tree up to 8 m. high, with smooth, slightly streak- 

 ed, light to dark gray bark; terminal bud present, glabrate, moder- 

 ate, 5 mm. or less long; fruit white, conspicuous all winter. Twigs 

 poisonous to the touch, causing a dermatitis. Swamps, Quebec to 

 Minnesota, south to Florida and Texas (Fig. 180). 



6. R. radicans L. Poison-Ivy. (R. toxicodendron of authors, 

 not L. ; Toxicodendron radicans Ktze. ). A shrub, erect and bushy, 

 scrambling over rocks, or climbing by aerial roots; twigs sparing- 

 ly pubescent or glabrate; fruits greenish-white. Poisonous to the 

 touch, in winter as well as summer. Thickets and fence-rows, 

 Quebec to British Columbia, south to Florida, Texas, New Mexico 

 and Arizona; often too abundant (Fig. 181). 



ILEX L. (Aquifoliaceae) 



Evergreen or deciduous shrubs or small trees. Twigs slen- 

 der, often developed as spurs with densely crowded leaf-scars; 

 pith small, continuous. Buds small, usually superposed, sessile. 

 Leaf-scars alternate, crescent-shaped; bundle-traces 1; stipule- 

 scars minute. Fruit fleshy, red (or sometimes yellow), composed 

 of 4 to 6 hard nutlets which fit together somewhat like the sections 

 of an orange; this might be regarded as a several-seeded drupe 

 (see p. 11 ). 



a. Leaves evergreen 



b. Leaves 0.4-1 cm. long 1. I. opaca 



b. Leaves 1. 5-5 cm. long 5. I. glabra 



a. Leaves deciduous 



b. Buds more or less appressed 



c. Buds glabrous except at apex; 



fruits on short stalks 3. I. montana 



c. Buds pubescent; fruits on long 



stalks 2. I. collina 



I 



