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



M. cv. Tipi (Hansen, N. E.) 



M. cv. Wamdesa (Hansen, N. E.) 



M. coronaria cv. Nieuwlandiana 



A. D. Slavin in Am. Midland Nat. 12 :364 (1931) as M . coronaria 

 f. nieuwlandiana. Syn: M. cv. Nieuwland. 



Introd. by the Parks System, Rochester, N.Y. Selected by Ber- 

 nard H. Slavin from a group of M. coronaria seedlings raised for 

 planting in Rochester, N.Y., parks. Named in 1931 by Arthur D. 

 Slavin, son of B. H. Slavin, for the Rev. J. A. Nieuwland, Pro- 

 fessor of Botany at the Univ. of Notre Dame. 



Description: Flowers; double, expanding buds rose red, open 

 pink, approx. 5.5 cm. across. Fruit; yellowish green, approx. 4 

 cm. in diam. 



Locations: (C), (D), (J), (S). 



M. coronaria cv. Thorns 



An employee of Siebenthaler Nursery, Louis Thorns, discovered 

 this spontaneous selection in 1920 on his farm near Franklin, Ohio. 

 Named for Thorns and introd. in 1927 by Siebenthaler Nursery, 

 Dayton, Ohio. Syns: M. cv. Thorns; M. cv. Thomsi; M. coronaria 

 plena; M. coronaria thomsi. This type also occurs spontaneously in 

 Pennsylvania according to Wister {6 A). 



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

 greenish yellow, approx. 2.5 cm. in diam. 



Location: (D). 



M. X dawsoniana* Rehd. 



Rehder in Sargent's, Trees and Shrubs, v. 2, p. 23 (1907). 



M. fusca X M . pumila. 



Introd. by the Arnold Arboretum. Grown from open-pollinated 

 seed collected in Oregon by Cyrus G. Pringle and sent in 1881 to 

 the Arnold Arboretum. Named for Jackson Dawson, former 

 propagator for the Arnold Arboretum. Type plant (now dead) 

 was Arnold Arboretum No. 5407. Grafts from type plant now 

 growing at the Arnold Arboretum under No. 5407-2. 



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



M. glabrata Rehd. 



Rehder in Sargent's, Trees and Shrubs, v. 2, p. 225 (1913). 

 Illus: Coker & Totten, Trees Southeast, States, 195 (1934). Syn: 

 Pyrus glabrata (Rehd.) Bailey. 



Introd. by the Arnold Arboretum. Habitat: North Carolina to 

 Alabama. Grown from seed collected in the wild by Charles S. 



