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



Description: Flowers; single and semidouble, expanding buds 

 white with trace of pink, open pure white, approx. 4 cm. across. 

 Fruit; yellow and red to dark crimson, approx. 2.3 cm. in diam. 



Locations: (B), (C), (0). 



M. X robusta* 8 cv. Persicifolia 



Rehder in Jour. Arnold Arb. 2: 55 (1920) as M. robusta var. 

 persicifolia. 



Grown from seed collected in 1910 by William Purdom in 

 northern China. Received as plant in 1913 by the Arnold Arbore- 

 tum from James Veitch & Sons, Ltd., Chelsea, England, as Pyrus 

 sp. (Purdom No. 179). Introd. into cultivation by the Arnold 

 Arboretum. Cultivar name refers to the narrow peachlike leaves. 



Description: Flowers; single, white, approx. 4 cm. across. Fruit; 

 bright red, shaded side sometimes yellowish or brownish green, 

 approx. 2 cm. in diam. 



Locations: (C), (J), (0), (Q). 



M. X robusta* 9 (No. 5) 



Grown from seed obtained in 1927 from Russia through arrange- 

 ments with the Arnold Arboretum. Introd. in 1947 by the Central 

 Experimental Farm, Canada Dept. of Agri., Ottawa, Ontario, 

 Canada. 



Selected for its use as a hardy vigorous understock for grafting 

 apple cultivars. Differs from typical M. X robusta* by having a 

 more wide spreading habit, slightly larger, bright-red and yellow 

 fruit, and much larger, broad, oval leaves that turn bright yellow 

 in the fall. Although its use has never been exploited as an 

 ornamental, it has value for its attractive fruits and fall leaf 

 color. 



Description : Flower and fruit descriptions similar to the species. 



Locations: (C), (H), (I), (Q). 



M. sargentii Rehcl. 



Rehder in Sargent's, Trees and Shrubs, v. 1, p. 71, pi. 36 (1903). 

 Illus: Rehder (loc. cit.) ; S. Richter in Planta (Arch. Wiss. Bot.), 

 viii. 158 (1929).— FL; Bull. Pop. Inform. Morton Arb. x. 47 

 (1935). — Hab. Syns: Pyrus sargenti (Rehd.) Bean; Pyrus malus 

 sargentii Anon, in Jour. Hort. Soc. [London] 41: cxix, fig. 96 

 (1915); Malus sieboldii var. toringo a. sargentii Koid. ; Malus 

 sieboldii var. sargentii f. ascendens Asami. 



' See footnote 7. 

 1 See footnote 7. 



