106 ROSACEAE 



Plants glandular-hispid, especially the inflorescence 



R. strigosus, p. 109 



Leaves green beneath; prickles on the angles of the stems; 

 fruit adhering to the receptacle. 

 Old stems erect, curving or arching (blackberries). 



Inflorescence densely glandular, glands stalked 



R. allegheniensis, p. 110 



Inflorescence not glandular or the stalks sessile. 



Leaves glabrous beneath R. canadensis, p. 110 



Leaves pubescent beneath. 



New canes deeply channeled between prominent 



angles R. argutus, p. 112 



New canes terete or nearly so R. frondosus, p. 113 



Old stems prostrate and trailing (dewberries). 



Leaves green above and below, stems sparsely retrorse- 



prickly R. flagellaris, p. 114 



Leaves dark green above, paler beneath; stems densely 



retrorse-bristly R. hispidus, p. 116 



RUBUS ODORATUS Linnaeus 

 Flowering Raspberry Thimbleberry 



The Flowering Raspberry, fig. 24, which grows 3 to 5 feet 

 high, is distinct among raspberries because of its simple leaves, 

 which are digitately ribbed and lobed, and its relatively tall 

 stems wnth more or less shreddy bark, w^hich are essentially 

 unarmed, though glandular-hispid in the young parts, and 

 villous. The broadly cordate leaf blades are 3- to 5-lobed with 

 triangular or ovate, abruptly acute lobes which are irregularly 

 serrate, 5 to 7 inches long and almost as wide, and pubescent 

 both above and below. 



The flowers, which appear from about the middle of June 

 to the middle of July, are grouped in terminal panicles and 

 have rose-purple, orbicular petals. The sepals and the long 

 flower pedicels are densely glandular-hispid. The flattened 

 spherical, reddish fruit, which matures in midsummer, is dry 

 and hardly pleasant to eat. 



Distribution. — The Flowering Raspberry is naturally an 

 inhabitant of rocky soil in woods and is distributed from Nova 

 Scotia westward to Michigan and south to Georgia and Ten- 

 nessee. In Illinois, essentially a prairie state with few rock- 

 covered regions, it has been known as a rare shrub. If it is not 

 now extinct, it should be found on wooded rocky slopes along 

 streams, especially in the hilly Ozark region of the state and 

 southward. 



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