ROSACEA. (rose family.) 141 



2. P. angustifolia, Ait. Leaves lanceolate or oblong, acute at the base 

 serrate, short-petioled ; corymbs simple, few-flowered ; flowers rose-color, very 

 fragrant ; styles smooth, distinct. — Open woods, chiefly in the upper districts. 

 April. — A small tree. Fruit very sour. 



* * Leaves simple, the midrib glandular above : fruit baccate qlobose. 



3. P. arbutifolia, L. Leaves oval-oblong or somewhat obovate, abruptly 

 acute or mucrouate, smooth above, except the midrib, finely serrate- styles 

 villous at the base. 



Var. erythrocarpa. Stem tall (5°- 10°) ; branchlets, cymes, and lower 

 surface of the large (2'-4'J leaves tomentose and hoary; petals and anthers 

 reddish ; berries red. 



Yar. melanocarpa. Stem low (2° -4°) ; branchlets, cymes, and leaves 

 smooth or nearly so ; leaves small ; petals white ; berries black. (Aronia me- 

 lanocarpa, Ell. ) — Swamps. March - April. 



* * * Leaves unequally pinnate : ci/mes compound : fruit baccate. 



4. P. Americana, DC. Leaflets 13-1 5, lanceolate, acuminate, serrate 

 above the middle, soon smooth ; cymes large, dense ; berry small, globose or 

 pear-shaped, scarlet. — Highest mountains of North Carolina. May -June. 

 — A shrub or small tree. J'ruit acid. 



18. AMELANCHIER, Medic. 



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

 or less united. Fruit baccate, containing 3-5 cartilaginous 2-seeded carpels ; 

 seeds separated by a false partition. — Shrubs or small trees, with simple 

 leaves, and white flowers in terminal racemes. 



1. A. Canadensis, L., var. Botryapium, Torr. & Gray. Branches, 

 leaves, and racemes tomentose when young, soon smooth ; leaves elliptical, 

 abruptly acute, finely and sharply serrate, cftsn slightly cordate ; racemes 

 slender, appearing before the leaves ; petals four times as long as the calyx ; 

 fruit globose, purplish. — Woods. Feb. - March. — A small tree, with smooth 

 whitish bark. 



A'"ar. rotundifolia, Torr. & Gray. Shrubby ; leaves roundish oval, 

 somewhat acuminate, sharply serrate; racemes 6-10-flowered ; petals small, 

 narrowly oblong. (Aronia,^//.) — Low grounds, chiefly in the upper dis- 

 tricts. JMarch. — Shrub 2° - 3° high. 



The cultivated representatives of this order are the Plum (Pkunts do- 

 MESTicus, L.), Apricot (P. Armeniaca, L.), Cherries (P. Avium and P. 

 Cerasus, L.), Peach (Persica vulgaris, Mill.), Apple (Pyrus malus, L.), 

 Pear (P. communis, L.), Quince (Cydonia vulgaris, Pers.), and the 

 Almoxd (Amy'gdalus). 



