ROSACES. (ROSE FAMILY.) 125 



{ 1. MALUS, Tourn. Leaves simple : cymes simple and umbel-like : fruit jfteshy, 

 globular, sunk in at the attachment of the stalk. ( APPLE.) 



1. P. coronaria, L. (AMERICAN CRAB-APPLE.) Leaves ovate, often 

 rather heart-shaped, cut-serrate or lobed, soon glabrous ; styles woolly and united at 

 the base. Glades, W. New York to Wisconsin and southward. May. Tree 

 20 high, with few, but very large, rose-colored fragrant blossoms, and translu- 

 cent, fragrant, greenish fruit. 



2. P. angpnstifolia, Ait. (NARROW-LEAVED CRAB-APPLE.) Leaves 

 oblong or lanceolate, often acute at the base, mostly toothed, glabrous ; styles dis- 

 tinct. Glades, from Pennsylvania southward. April. 



P. MALUS, the APPLE-TREE, is often found in deserted fields and copses. 

 P. COMMUNIS, the PEAR-TREE, represents the typical section of the genus. 



2. ADENORACHIS, DC. Leaves simple, the midrib beset with glands along 

 the upper side: cymes compound: styles united at the base: fruit berry -like, small. 



3. P. arbutifolia, L. (CHOKE-BERRY.) Leaves oblong or obovate, 

 finely serrate ; fruit pear-shaped, or when ripe globular. Var. 1. ERYTHRO- 

 CARPA has the cyme and leaves beneath woolly, and red or purple fruit. Var. 

 2. MELANOCARPA is nearly smooth, with black fruit. Damp thickets, common. 

 May, June. Shrub 2 - 10 high. Flowers white, or tinged with purple. 



3. S6RBUS, Tourn. Leaves odd-pinnate: cymes compound: styles separate: 

 fruit berry-like, small. 



4. P. Americana, DC. (AMERICAN MOUNTAIN-ASH.) Leaflets 

 13-15, lanceolate, taper-pointed, sharply serrate with pointed teeth, smooth ; 

 cymes large and flat. Swamps and mountain woods, N. England to Wiscon- 

 sin northward, and along the Alleghanies southward. June. A slender shrub 

 or low tree, with white blossoms ; greatly prized in cultivation for its ornamen- 

 tal clusters of scarlet fruit (not larger than large peas) in autumn and winter. 



P. AUCUPARIA, Gaertn., the cultivated EUROPEAN MOUNTAIN-ASH or ROW- 

 AN-TREE, is known by its paler, shorter, and blunt leaflets, and larger fruit. 



18. AMELANCHIER, Medic. JUNE-BERRY. 



Calyx 5-cleft. Petals oblong, elongated. Stamens numerous, short. Styles 

 5, united below. Fruit (pome) berry-like, the 5 cartilaginous carpels each di- 

 vided into 2 cells by a partition from the back ; the divisions 1-seeded. Small 

 trees or shrubs, with simple sharply serrated leaves, and white flowers in ra- 

 cemes. (Amelancier is the popular name of A. vulgaris in Savoy.) 



1. A. Canadensis, Torr. & Gray. (SHAD-BUSH. SERVICE-BERRY.) 

 Calyx-lobes triangular-lance-form ; fruit globular, purplish, edible (sweet, ripo 

 in June). Along streams, &c. : common, especially northward. April, May. 

 Varies exceedingly; the leading forms are, 



Var. Botryapium ; a tree 10 -30 high, nearly or soon glabrous; 

 leaves ovate-oblong, sometimes heart-shaped at the. base, pointed, very sharply 

 serrate ; flowers in long drooping racemes ; the oblong petals 4 times the length 

 of the calyx. (Pyrus Botryapium, Wittd.) 

 11* 



