27 
199. R. toxicodendron, L. Poison Ivy. Poison Oak. 
Everywhere common or abundant. May — June. 
When erect, from 1 to 4 feet high. The climbing form, stems of 
which are occasionally two inches in diameter, is much less 
common. ; 
f 200. R. canadensis, Marsh. Fragrant Sumach. 
R. aromatica , Ait. 
Lake shore ; common. May — July. 
3 7 
POLYGALACEJE. 
POLYGALA, Tourn. Polygala. Milkwort. Indian Pink. 
201. p. paueifolia, Willd. Fringed Polygala. 
Homewood and Cook Co., Hill, — in Plants of Illinois. (B.) 
202. P. polygama, Walt. Pink Polygala. 
-> 1 In sandy soil; not common. July — August 15th. 
Hyde Park, south and .west. Pine Station and Miller’s Ind. ; fre- 
quent. 
203. P. senega, L. Seneca Snake-root. 
Sandy fields and banks , frequent. May — June. 
Specimens nearly two feet high have been collected at Stony Island. 
204. P. incarnata, L. 
A few specimens were found near Cheltenham Beach in July, 1886. 
Eggleston, Ind., 1885, Hill. (B.) 
Flowers pale rose color. 
205. P. sanguinea, L. Purple Milkwort. 
Wet places, usually in sandy soil; not common. July — -August 15th. 
Evanston. Glencoe. Chiefly Hyde Park and south. Riverside, 
Bastin. 
206. P. cruciata, L. 
of - Occasionally found along the lake shore in low sandy soil, especially 
near the sloughs, south. July. 
Asbury avenue, South Evanston, where it is associated with Drosera 
% rotundifolia, L., and Lycopodium inundatum, L. 
Found with white flowers, Hammond, Ind., Hill. 
207. P. verticillata, L. 
q. Dry sandy soil, near the lake shore; frequent. Chiefly south. 
July — August. 
