116 KEY AND FLORA 



small, pink or purple, in a close panicle. Follicles 5, densely downy, 

 several-seeded. On low ground S., and along fence rows and in pas- 

 tures N., where it is a troublesome weed.* 



III. CYDONIA L. 



Trees or shrubs. Leaves simple, toothed or lobed, stipules 

 deciduous. Flowers usually solitary, "white or pink. Calyx 

 tube urn-shaped, 5-lobed, its epigynous lobes acute, spreading, 

 persistent. Petals 5. Stamens numerous, inserted with the 

 petals on the calyx tube. Styles 2-5, mostly 5, united at the 

 base ; ovary 5-celled, seeds many in each cell. Fruit a pome, 

 globose, usually depressed or hollowed at the extremities ; 

 flesh without hard grains.* 



1. C. vulgaris Pers. Quince. Shrub 6-12 ft. high. Leaves oblong- 

 ovate, acute at the apex, obtuse at the base, entire, downy below. 

 Flowers large, white or pink. Fruit ovoid, downy. Cultivated.* 



2. C. japonica Pers. Japan Quince. A widely branching shrub, 

 3-6 ft. high ; branches with numerous straight spines. Leaves ovate- 

 lanceolate, acute at each end, smooth and shining, serrulate ; stipules 

 conspicuous, kidney-shaped. Flowers in nearly sessile axillary clusters, 

 bright scarlet. Fruit globose. Common in cultivation.* 



IV. PYRUS L. 



Trees. Leaves simple, stipules small, deciduous. Flowers 

 in cymes, large, white or pink. Calyx urn-shaped, 5-cleft, its 

 epigynous lobes acute. Petals rounded, short-clawed. Stamens 

 numerous, borne with the petals on the calyx tube. Styles 5, 

 distinct or slightly united at the base. Fruit a pome, with 

 about 2 seeds in each carpel.* 



B. Fl. species 2-5 (Malus) ; species 6 (Aronia) ; species 

 7, 8 (Sorbus). 



1. P. communis L. Pear. A tree, often very large; head usually 

 pyramidal, branches often thorny. Leaves thick and leathery, ovate 

 or oval, acute, finely serrate or entire, downy when young, becoming 

 smooth with age ; petioles slender. Cymes few-several-flowered, 

 terminal, and at the ends of " fruit spurs " grown the previous sea- 

 son. Flowers white. Styles not united. Fruit obovoid, with hard 

 gritty grains near the core. A European and Asiatic tree common 

 in cultivation.* 



