ROSE FAMILY 



than to the flower. All our native roses are single ; all 

 are pink. White flowers occasionally occur, but rather 

 as an inconstant variation than as a specific character. 

 The pink of the rose is unstable ; it fades so quickly in 

 the bright sunlight that in order to know the real 

 color of the flower one must see it when opening. The 

 blossom secretes no nectar ; its fragrance-call to the 

 bee is an invitation to gather pollen. 



The fruit, which is peculiar and characteristic, con- 

 sists of a hollow cup within which are closely packed 

 many achenes, and protruding through a hole at the 

 top are the remnants of the styles, one style for each 

 achene. It is called a hip, and is the invariable fruit of 

 the rose. Two views exist concerning it. Some con- 

 sider it to be the calyx-tube which has become fleshy ; 

 others regard the fleshy part of the hip as the recepta- 

 cle enlarged and hollowed so as to embrace and pro- 

 tect the achenes. 



MICHIGAN ROSE, CLIMBING ROSE. PRAIRIE ROSE 



Rosa setigera. 



A climbing rose found in thickets and on prairies. Ranges 

 from Ontario to Ohio, South Carolina and Florida, west to Wis- 

 consin and Nebraska and southwest to Texas; has escaped from 

 cultivation in New Jersey and Virginia. Grows rapidly; strong 

 shoots reaching ten to twenty feet in a single season. 



Stems. Climbing or sprawling, several feet long, armed with 

 scattered, straight or curved prickles, not bristly. Twigs, peti- 

 oles, and peduncles often glandular-pubescent. Stems green or 

 reddish, often dark purple with a bloom. 



Leaves. Leaflets three to five, one and a half to two and a 

 half inches long, oval or ovate, acute or obtuse at apex, sharply 



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