KEY TO THE SPECIES OF APPLE 



1. Leaves never lobed, rolled up in bud; naturalized. 



2. Calyx persistent on fruit .leaves hairy below; fruit 1 inch or more 

 in diameter Malus pumila Mill., Apple, p. 247. 



2. Calyx deciduous from fruit; leaves glabrous; fruit Yz-Yi inc in 

 diameter M. baccata (L.) Borkh, Siberian Crab Apple 



1. Leaves more or less lobed, at least on vigorous shoots, folded in bud; 

 native. 



3. Eastern; calyx persistent on green (rarely yellow) waxy fruit. 



4. Leaves and calyx woolly; Great Plains, Wisconsin, and Minne- 

 sota to Louisiana and Texas 



M. ioensis (Wood) Britt., Prairie Crab Apple 



4. Matiu-e leaves and calyx not woolly. 



5. Leaves on vigorous shoots distinctly and deeply lobed. 



6. Leaves rounded or wedge-shaped at base; North and 



Central 



. . . .A/, coronaria (L.) Mill., Sweet Crab Apple, p. 247. 



6. Leaves heart-shaped at base; North Carolina to Alabama 

 M. glabrata Rehd., Biltmore Crab Apple 



5. Leaves on vigorous shoots slightly lobed. 



7. Fruit about 2 inches broad, much broader than high, 

 with deep cavity at top and base; Ohio to West Virginia, 



south to North Carolina and Georgia 



M. platycarpa Rehd., Bigfruit Crab Apple 



7. Fruit about 1 inch broad and long, with shallow cavities. 



Virginia to Illinois, south to Florida and Louisiana 



. . M. angustifolia (Ait.) Michx., Southern Crab Apple 

 3. West Coast; calyx deciduous on yellow to red non-waxy fruit; 



Alaska to California 



M. diver sifolia (Bong.) Roem, Oregon Crab Apple 



TORREY VaUQUELINIA 



Vauquelinia californica (Torr.) Sarg. 



This is a shrub or small tree rarely 20 feet high, native to 

 southern Arizona, southwestern New Mexico, and northern 

 Mexico. It is characterized by simple, persistent, lanceolate 

 leaves lVi-3 inches long, with remote, small, glandular teeth; 

 small, regular, perfect, white flowers borne in leafy, woolly 

 panicles; and a woody, ovoid, capsular, 5-celled fruit about 

 14 inch long, which is woolly, subtended by the remnants of 

 the flower, and long persistent on the branches. 



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