STANDEE Y TEEES AND SHRUBS OF MEXICO. 335 



that the first apple trees vere brought to Mexico by Gregorio Lopez, and planted 

 in Jalisco about 1522. Clavigero relates that the Jesuits planted apple trees in 

 Baja California in the 18th century. 

 Carpels of the fruit hard and bonelike ; plants usually armed with spines. 



1. CRATAEGUS. 

 Carpels of the fruit thin and papery ; plants without spines. 



Fruit large, 2 cm. in diameter or larger 2. PHOTIWIA. 



Fruit small, 1 cm. in diameter or smaller. 



Leaves oblong or lanceolate, S to 10 cm. long, dentate__3. HETEROMELES. 

 Leaves rounded or oval, 5 cm. long or shorter, entire or obscurely dentate. 



4. AMELANCHIER. 



1. CRATAEGUS L. Sp. PI. 475. 1753. 

 Refekence: Eggleston, Bull. Torrey Club 36: 501-514. 1909. 

 Shrubs or small trees with dark brown, scaly bark, nearly always armed 

 with long stout spines ; leaves dentate or lobate, petiolate, deciduous ; flowers 

 white, corymbose, strong-scented, the odor often very disagreeable ; fruit 

 usually globose or pyriform ; wood hai'd and tough. 



The species (in the United States called "hawthorn" and "red haw") are 

 known in Mexico imder the name " tejocote " or " texocotl." Buelna gives 

 the Otoml names as " dopri," " dopini," and " vipeni." The fruit is highly 

 valued and is a common article in the markets. It is eaten raw or more com- 

 monly made into jelly or preserves. The trees are often cultivated. The fruit 

 is reputed to have pectoral properties, although, apparently without sufficient 

 basis. The roots are used in domestic medicine because of their supposed 

 diuretic and antidysenteric properties. The wood, which is hard and compact, 

 is used for various purposes. 



Mexican specimens of the genus are reported by Sesse and Mocino ' as 

 Crataegus criis-galU and Mespitus pyracantha. 

 Branchlets, corymbs, and lower surface of leaves glabrous. Fruit red. 



1. C. baroussana. 

 Branchlets, corymbs,, and lower surface of leaves tomentose. 



Leaf blades broadly ovate, tomentose on both sides. Stamens about 10 ; 



styles 4 or 5; calyx lobes serrate; fruit red 2. C. greggiana. 



Leaf blades mostly elliptic, lanceolate, or obovate. 



Stamens 5 to 10. Styles 3 or 4 ; calyx lobes serrate ; fruit red, with 3 or 4 



nutlets 3. C. rosei. 



Stamens about 20. 

 Calyx lobes serrate. Styles usually 2 or 3; fruit yellow, with 2 or 3 



nutlets 4. C. pubescens. 



Calyx lobes entire. 



Leaf blades oblanceolate or obovate 5. C. stipulosa. 



Leaf blades mostly lanceolate or elliptic. 



Styles 2 or 3 ; leaves glabrous on the upper surface. Fruit yellow, 



with 2 or 3 nutlets 6. C. parryana. 



Styles 3 to 5 ; leaves tomentose on the upper surface. 



Leaf blades 3 to 9 cm. long; styles usually 3 or 4. Fruit 



orange 7. C. mexicana. 



Leaf blades 1.5 to 5 cm. long; styles usually 4 or 5__8. C. nelsoni. 

 1. Crataegus baroussana Eggleston. Torreya 7: 35. 1906. 

 Coahuila ; type from mountains near Saltillo. 



' PI. Nov. Hisp. 84, 85. 1887. 



