TREES AND SHRUBS 



91 



MALACEAE. Apple Family 



Trees or shrubs, with alternate simple or pinnately compound 

 leaves having fugacious stipules; flowers regular, in racemes or 

 cymes; hypanthium mostly spheroidal, adnate to the 1- to 5-eelled 

 ovaries; petals and sepals 5; stamens usually many, distinct; fruit 

 a pome with papery, bony or leathery capsule. 



Cavities of the ovary becoming twice as many 

 as the styles by a false, partial or complete 

 partition; fruit soft and berry-like; flowers 

 racemose. 

 Cavities of the ovary not divided, as many as 

 the styles; fruit a pome; flowers in corym- 

 biform cymes. 

 Leaves simple, lobed; ovules one in each car- 

 pel. 

 Leaves pinnate; ovules 2 in each carpel. . 3. Sorbus. 



Amelanchier. 



2. Ckategus. 



I. AMELANCHIER L. Service-berry 



Shrubs 3 to 6 feet high, with alternate simple, mostly rather 

 coarsely serrate small leaves, and white flowers in racemes ter- 

 minating short branches of the year; stamens numerous, all borne on 

 the hypanthium, the latter adnate to the inferior ovary; fruit" berry- 

 like. 



Leaves acutish, oblongovate. 

 Leaves obtuse to truncate, broader. 

 Mature leaves finely pubescent, at least be- 

 neath. 

 Leaves crenate, pubescent on both surfaces. 

 Leaves sharply serrate, pubescent beneath. 

 Mature leaves glabrous or loosely villous, 

 never finely pubescent. 

 "Whole plant perfectly glabrous. 

 Bud scales and usually the young leaves 

 villous. 

 Mature leaves with loose pubescence be- 

 neath and often above, not cordate or 

 but slightly so, often cuneate, usually 

 entire below the middle. 

 Petals 8 mm. long or less. 

 Petals 10 to 15 mm. long. 



1. A. rubescens. 



A. crenulata. 

 A. bakeri. 



4. A. poylcarpa. 



A. oreophila. 

 A. ulmifolia. 



