224 SYSTEMATIC BOTANY. 



corymbed ; calyx and pedicels usually smooth ; styles 3-5 ; fruit large, glo- 

 bose, bright red. A small tree, 10-20 feet high. May. 



2. C. TOMENTOSA (Black Thorn}. Leaves oval, or elliptic -ovate, doubly 

 serrate, dentate toward the apex, nearly smooth above, tomentose beneath ; 

 flowers large, fragrant, white, in large, leafy corymbs, with calyx and pedi- 

 cels villous-tomentose ; styles 3-5 ; fruit pyriform, ovary red, eatable, but 

 rather insipid. In wet thickets, 10-15 feet high. May. 



12. Pyrus. Calyx urceolate, with a 5-cleft limb. Petals 5, round- 

 ish. Styles 2-5, often united at base. Pome closed, fleshy, 2-5 car- 

 peled. Carpels cartilaginous, 2-seeded, 



1. P. MALUS (Apple). Leaves ovate, or oblong-ovate, serrate, acute, or 

 briefly acuminate, tomentose beneath, petiolate ; flowers large, light rose- 

 color, fragrant, in corymbs ; petals short ; styles 5, united and villous at 

 base ; pome globose. A fruit-tree, cultivated, and almost naturalized, 20-40 

 feet high. May. 



2. P. COMMUNIS (Pear). Leaves ovate-lanceolate, smooth above, pubes- 

 csnt beneath ; flowers smaller than in the apple, white, in racemose corymbs, 

 styles 5, distinct and villous at base ; pome usually pyriform. A tree, 20-50 

 feet high. May. 



3. P. ARBUTIFOLIA (Choke-berry). Leaves oblong-ovate, obtuse, or 

 acute, smooth and shining above ; flowers in compound, terminal corymbs ; 

 calyx and pedicels tomentose when young ; fruit pyriform, dark red, or pur- 

 ple when ripe, astringent. A shrub, 2-5 feet high, in low grounds. May. 



4. P. AMERICANA (Mountain Ash). Leaves pinnate, i3-i5-foliate, 

 smooth ; leaflets oblong-lanceolate, sharply serrate ; flowers white, in com- 

 pound cymes ; fruit bright red, or scarlet, globose, sour. A small tree, 15-25 

 feet high, common in damp woods in mountainous districts. May-June. 



13. Amelanchier. Calyx 5-cleft. Petals oblong-ovate. Stamens 

 short. Styles 5, more or less connected. Pome 3-5-celled, cells partly 

 divided by a false dissepiment. 



A. CANADENSIS (Shad-flower). Leaves ovate, or oval, softly tomentose 

 when very young, smooth when fully grown, sharply serrate ; flowers white, 

 racemose ; berries purple, eatable. A common and variable shrub in damp, 

 rocky woods, and low grounds, 6-15 feet high. May. 



Var. OBLONGIFOLIA. Leaves oval-oblong, serrate, with short acute 

 teeth, tomentose on the lower surface during flowering ; flowers smaller than 

 in normal form ; petals obovate-oblong. Apparently well marked while in 

 flower, but difficult to distinguish afterward. 



14. Cydonia. Calyx urceolate, with a 5-cleft limb. Petals 5. 

 Styles 5. Pome with 5 cartilaginous, many-seeded carpels. Seeds 

 covered with a mucilaginous pulp. 



C. VULGARIS (Quince). Leaves oblong-ovate, entire, smooth above, 

 woolly beneath ; flowers large, solitary, on woolly peduncles ; calyx woolly ; 

 petals white ; pome soft, downy, obovoid, yellow. A large shrub of strag- 

 gling growth. May. 



