AMELANCHIER. XLVIII. ROSACES. 245 



Leaves simple. Cymes compound. Styles united at base. 



5. P. ARBUTIFOLIA. Linn. f. (Mespilus. Linn. Aronia. Pers.} Choke Berry. 

 Lvs. oblong-obovate or oval-lanceolate, obtuse or acute, crenate-serrulate, 



smooth above, tomentose beneath when young, attenuate at base into a short 

 petiole ; ped. and col. when young, tomentose ; fr. pyriform or subglobose, dark 

 red. Low, moist woodlands, U. S. and Can. A shrub 5 8f high. Leaves 1 

 2' long, J as wide, often subacuminate, subcoriaceous, serratures small, with 

 a glandular, incurved point ; petioles 2 4" long. Flowers white, in compound, 

 terminal corymbs of 12 or more. Fruit astringent, as large as a currant. May Jn. f 

 /?. melanocarpa. Hook. (P. melanocarpa. Willd.} Lvs., col. and ped. gla- 

 brous or nearly so ; fr. blackish-purple. Swamps. Height 2 4f. 



Leaves pinnate. Cymes compound. Styles distinct. 



6. P. AMERICANA. DC. (Sorbus Americana. PA.) Mountain Ash. 

 Lfts. oblong-lanceolate, acuminate, mucronately serrate, smooth, subses- 



sile ; cymes compound, with numerous flowers ; pome small, globose ; sty. 3 5. 

 A small tree in mountain woods, N. Eng. and Mid. States. Trunk 15 20f 

 high, covered with a reddish-brown bark. Leaves 8 12' long, composed of 9 

 15 leaflets. Leaflets 2 3' by 1', subopposite, often acute, on petioles I" 

 in length. Flowers small, white, in terminal cymes, of 50 100 or more. Fruit 

 scarlet, 23" diam., beautiful. May. f 



/?. microcarpa. T. &> G. (P. microcarpa. DC. Sorbus microcarpa. PA.) 

 Fr. smaller. 



7. P. AUCUPARIA. English Mountain Ash. Lfts. as in P. Americana, except 

 that they are always smooth on both sides, and, with the serratures, less acute 

 at apex ; fls. corymbose ; fr. globose. Native of Europe. A tree 20 40f high, 

 often cultivated as well as the last species, for its ornamental clusters of scar- 

 let berries. It is a tree of larger size and rougher bark than the last, but is 

 hardly to be distinguished by the foliage, flowers or fruit, -f 



8. CYDONIA. Tourn. 

 Named for Cydonia, a town in Crete, from whence it was brought. 



Calyx urceolate, limb 5-cleft ; petals 5 ; styles 5 ; pome 5-carpeled ; 

 carpels cartilaginous, many-seeded ; seeds covered with mucilaginous 

 pulp. Trees or shrubs. Lvs. simple. Fls. mostly solitary. 



C. VULGARIS. Pers. (Pyrus Cydonia. Willd.} Quince. Lvs. oblong-ovate, 

 obtuse at base, acute at apex, very entire, smooth above, tomentose beneath ; 

 ped. solitary, and, with the cal., woolly ; pome tomentose, obovoid. Shrub 8 I2f 

 (rarely 20f ) high, with crooked, straggling branches. Leaves about as large 

 as those of the pear tree. Flowers white, with a tinge of purple, large, termi- 

 nal. Fruit large, lengthened at base, clothed with a soft down, yellow when 

 ripe, highly esteemed for jellies and preserves. The plant is reared from layers. 



10. AMELANCHIER. Medic. 



Calyx 5-cleft ; petals 5, oblong-obovate or oblanceolate ; stamens 

 short ; st}^les 5, somewhat united at base ; pome 3 5-celled ; cells 

 partially divided, 2-seeded. Small trees or shrubs. Lvs. simple, ser- 

 rate. Fls. racemose, white. 



A. CANADENSIS. Torr. & Gray. (Mespilus. Linn. Aronia. Pers. Pyrus 

 Botryapium. Linn. f. Mespilus arborea. Michx.} Shad Berry. June 

 Berry. Wild Service Berry. Lvs. oval or oblong-ovate, often cordate at 

 base, acuminate or cuspidate or mucronate, sharply serrate, smooth ; roc. loose, 

 elongated; seg. of the cal. triangular-lanceolate, nearly as long as the tube; pet. 

 linear-oblong or oblanceolate ; fr. purplish, globose. A small tree or shrub, 

 found in woods, U. S. and British Am., rarely exceeding 35f in height. Leaves 

 alternate, 2 3' long, downy-tomentose when young, at length very smooth on 

 both sides, very acute and finely serrate. Flowers large, white, in terminal 

 racemes, appearing in April and May, rendering the tree quite conspicuous in 

 the yet naked forest. Fruit pleasant to the taste, ripening in June. 



