52 NATL. ARBORETUM CONTRIB. NO. 2, U.S. DEPT. AGR. 



An open pollinated seedling. Originated at Des Moines Water 

 Works, Des Moines, Iowa. Selected in 1940 and named by Arie F. 

 den Boer. Introd. in 1948. Late flowering. Disease free (41). 



Description : Flowers ; single, pink, approx. 5 cm. across. Fruit ; 

 dark crimson to oxblood red, approx. 4.6 cm. in diam. 



Location: (R). 



cv. Prairie Rose* 



An open pollinated seedling of M. ioensis. 



Introd. before 1959 by the Agr. Experimental Station, Univ. of 

 Illinois, Urbana, 111. Similar to but with deeper pink flowers than 

 M. ioensis cv. Plena. Formerly OPS 825. 



Description : Flowers ; double, pink. 



Location: (A). 



cv. Pretty Marjorie 



Originated in Holland. Introd. into U.S.A. by the Arnold Arbore- 

 tum about 1958. 



Locations: (C), (O). 



cv. Prince George's* 



Probably M. ioensis cv. Plena X M. angustifolia (67). Syns: M. 

 angustifolia cv. Plena; M. cv. Prince George; M. cv. Prince 

 Georges. 



Originated from open pollinated seed collected in 1919 at the 

 Arnold Arboretum by a plant explorer for the U.S. Dept. of Agr. 

 The original plant was grown at the Plant Introduction Station, 

 Glenn Dale, Md. and scions were sent in 1930 to the Arnold 

 Arboretum. Introd. in 1943 by the Arnold Arboretum. Named for 

 Prince George's County, Maryland, the county in which the Glenn 

 Dale Station is located. 



Description: Flowers; double (approx. 53-61 petals), expanding 

 buds deep rose pink, open light rose pink, approx. 5 cm. across. 

 Not known to produce fruit. 



Locations: (C), (T). 



cv. Printosh 



M. baccata 



3 



cv. Prince 



M. cv. Tetofsky (Apple)— I = cv. Printosh 



cv. Mcintosh (Apple)-" 



Introd. by the Central Experimental Farm, Canada Dept. of 

 Agr., Ottawa, Ontario, Canada. Originated from a cross made in 



