504 Eggleston : Crataegi of Mexico and Central America 



highlands of the Andes. In Mexico the fruit is of much economic 

 importance, being often found in the markets, and the trees are 

 guarded as carefully as other fruit trees arc with us. 



Key to Mexican and Central American Crataegfi in flower 



I. Vegetative twigs, corymbs, and lower surface of leaves glabrous; 

 leaves broadly ovate ; stamens about IO ; styles 4 or 5, calyx-lobes 



serrate; fruit red C. Baroussana. 



1. Vegetative twigs, lower surface of leaves, and corymbs tomentose... 2. 

 2. Leaves broadly ovate, tomentose on both sides; stamens 



about 10; styles 4 or 5 ; calyx-lobes serrate ; fruit red C. Gregqiana. 



2. Leaves narrower, — elliptical, lanceolate, etc 3. 



3. Stamens 5-10; styles 3 or 4 ; calyx-lobes serrate ; fruit 



red C. Rosei. 



3. Stamens about 20 4. 



4. Calyx-lobes serrate, styles usually 2 or 3 ; fruit yellow. C. pubescens. 



4. Calyx lobes entire 5- 



5. Leaves oblanceolate C. stiptdosa. 



5. Leaves lanceolate, elliptical, etc 6. 



6. Styles 2-3 ; leaves glabrous above ; fruit 



yellow C. Parryana. 



6. Styles 3-5, leaves tomentose above 7. 



7. Leaves 3-9 cm. long, styles usually 3 



or 4 ; fruit orange C. mexicana. 



7. Leaves 1.5-5 cm. long; styles usually 



4 or 5 C. Nelsoni. 



Key to Mexican and Central American Crataegi in fruit 



I. Vegetative twigs glabrous C. Baroussana 



I. Vegetative twigs tomentose 2. 



2. Leaves broadly ovate C. Gregg/ana. 



2. Leaves elliptical, etc 3. 



3. Fruit large, 15-30 mm. thick 4. 



3. Fruit small, 8-15 mm. thick 5. 



4. Leaves oblanceolate C. stipnlosa. 



4. Leaves lanceolate, etc 6. 



6. Nutlets 3-5; calyx-lobes erect, entire; fruit 



orange C. mexicana. 



6. Nutlets 2 or 3 ; calyx-lobes reflexed, glandular- 

 serrate ; fruit light yellow C. pnbescwis. 



5. Nutlets 2 or 3 ; fruit yellow ; calyx-lobes 



entire C. Parryana. 



5. Nutlets 3 or 4 ; fruit red; calyx-lobes 



serrate C. Rosei. 



5. Nutlets 4 or 5 ; calyx-lobes entire C. Nelsoni. 



