G.38] 



CLASSIFICATION AND DESCRIPTION 



103 



(sometimes abruptly sharp-pointed), usually 

 doubly serrate with rather spreading teeth, 

 generally pale beneath. Leaf-buds some- 

 what hairy. Flowers and berries larger, but 

 in smaller clusters, than the preceding spe- 

 cies. The berries globose when ripe, ^ in. 

 broad, bright red. This species, much like 

 Pyrus Americana, is found wild in northern 

 New England and westward. 



P. sambucifdlia. 



P. aucup&ria. 



9. P^TUS aucuparia, Gaertn. (EURO- 

 PEAN MOUNTAIN-ASH, OR EOWAN-TREE.) 

 Much like Pyrus Americana, but the leaf- 

 lets are paler and more obtuse, with their 

 lower surface downy. Leaf-buds blunter 

 and densely covered with hairs. Flowers 

 larger, } in. or more in diameter. Fruit 

 also much larger, sometimes nearly j in. 

 in diameter. Beautiful tree, 20 to 30 ft. 

 high, often cultivated. 



GENUS 38. CRAT^GTJS. 



Thorny shrubs or small trees with simple, alternate, 

 serrate, doubly serrate or lobed leaves. Flowers cherry- 

 like blossoms, usually white in color and growing in 

 corymbs, generally on the ends of side shoots ; in spring. 

 Fruit a berry or drupe with 1 to 5 bony stones, tipped 

 with the 5 persistent calyx-teeth ; ripe in autumn. 



* Calyx, stipules, bracts, etc., often glandular. (A.) 

 A. Flowers and fruit often over 6 in a cluster. (B. ) 



B. Leaves usually abrupt at base 1. 



B. Leaves usually attenuate at base 2. 



A. Flowers and fruit few, 1 to 6 in a cluster 10. 



* Calyx, etc., without glands (No. 4 has glandular teeth to the 



calyx); flowers many in a cluster. (0.) 

 0. Leaves more or less tapering at base. (D.) 



D. Leaves generally lobed ; cultivated, rarely escaped 3. 



D. Leaves rarely lobed ; native. (E.) 



E. Leaves small, shining, crenate at the end .5. 



E. Leaves villous or pubescent, at least when young . . .9. 

 E. Leaves smooth or only downy at the axils, acutely ser- 

 rate. South... ...7. 



