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MANUAL OP POISONOUS PLANTS 



Fig. 271. European Wood Strawberry iFragaria 

 vesca). This plant occurs in fields and along road- 

 sides. Sometimes causes dermatitis. (W. S. Dudgeon). 



Prof. Prentiss * reports the case of a man who, at the age of 14, had become 

 quite ill from eating strawberries and forever afterward could not eat them 

 without becoming ill. 



3. Rosa L,. 



Erect or climbing shrubs, with prickly stems, alternate leaves adnate to 

 the petioles; flowers showy, corymbose, or solitary; calyx urn-shaped; stamens 

 and carpels numerous; achenes, enclosed in a berry-like calyx tube. Several 

 species of the genus Rosa are more or less troublesome in fields. The Rosa 

 centifolia, used for preparing rose water contains a volatile oil. A confection is 

 made from the hips of Rosa canina. R. gallica contains a volatile oil and a 

 yellow crystalline glucoside querdtin. 



Rosa prafincola Greene. Prairie Rose 



An erect perennial shrub with densely prickly stems bearing slender bristles ; 

 narrow stipules, more or less glandular, toothed; leaflets 7-11, broadly elliptical 

 to oblong-lanceolate, sessile or nearly so ; flowers corymbose or rarely solitary, 

 pink; sepals lanceolate, somewhat glabrous; fruit smooth. 



Distribution. Common on prairies of Wisconsin, Iowa to Texas, New Mex- 

 ico and Montana. In Iowa, Missouri and parts of Minnesota and Arkansas, it 

 is most troublesome. 



Rosa blanda Ait. Smooth Rose 



An erect shrub with few straight prickles or wholly unarmed; from 1-3 

 feet high ; leaflets 5-7, short stalked ; oblong-lanceolate ; cuneate ; stipules dilated, 

 naked or slightly glandular-toothed ; flowers usually large, corymbose or solitary. 



Distribution. From Newfoundland to Ontario and Illinois. 



* Bot. Gazette 13:19. 



