POLYPETALOUS EXOGENOUS PLANTS. 259 



corymbs large, tomentose; styles 1-3; fruit pear-shaped, 

 orange-red. 



C. ARBORESCENS. Unarmed ; leaves lanceolate, acute at 

 each end, deeply serrate, glabrous on the upper surface, 

 hairy underneath at the division of the veins, sometimes 

 slightly lobed toward the summit ; corymbs many-flowered ; 

 calyx hairy, the segments subulate, entire ; fioiuers pentagy- 

 nous. — Drummond, 



** Corymbs simple, 1-6-Jlowered. 



C. PARVIFOLIA, Ait. Leaves obovate, scarcely petioled, 

 serrate, the lower surface, like tlie branchlets and calyx, 

 pubescent; S2nnes numerous, long and slender; floioers 

 mostly solitary; calyx-loh^s large, serrate; styles h', fruit 

 large, globose or pear-shaped, somewhat hairy. — A much- 

 branched shrub, 3°-5° high; leaves V long. 



PYEUS, L. Pear and Apple. 



Calyx urn-shaped, 5-cleft; petals 5; stamens numerous; 

 styles 2-5; fruit fleshy or baccate, containing 2-5 cartila- 

 ginous 2-seeded carpels. — Trees or shrubs ; flowers cymose 

 or corymbose. 



* Leaves simple, glandular ; fruit depressed at the base. 



P. ANGUSTIFOLIA, Ait. Leaves lanceolate or oblong, 

 acute at the base, serrate, short-petioled ; corymbs simple, 

 few-flowered ; floiuers rose-color, very fragrant ; styles 

 smooth, distinct. — A small tree ; fruit very sour. 



Var., :n[ELAnocarpa. Stem low, 2°-4° ; branchlets, cymes, 

 and leaves smooth ; leaves simple, small : petals white ; 

 fruit baccate, globose ; berries black. 



