SANGUISORBACE^. 105 



* Petals spreading, fiat. Styles b, nearly united at base. Leaves simple, 

 without glands. Malus. 



1. P. cm-onaria Linn. : leaves broad-ovate, rounded at base, serrate, 

 somewhat angulate-lobed, smoothish ; corymbs terminal, fev?-flowered, on 

 long peduncles ; fruit depressed, globose. Malus coronaria Mich. 



In woods. N. Y. to Geor. May.— A tree 15—20 feet high. Flowers large, 

 fragrant, pale rose-color. Fruit an inch and a half in diameter, pale, greenish- 

 yellow, firm and hard, very acid. Crah Apple. 



2. P. angustifolia Ait. : leaves lanceolate-oblong, acute at base, slightly 

 crenate-dentate or almost entire, smooth, shining above; flowers in co- 

 rymbs ; pedicels smooth. Malus angustifolia Mich. 



' In woods. Penn. to Geor. and Louis. March— May.— A tree 15—20 feet 

 high. Leaves a.nd fruit smaller than in the preceding. 



Narrow-leaved Crab Apple. 



** Petals spreading. Styles 2— 5. Leaves pinnate. Sorbus. 



3. P. Americana D. C. : leaves pinnate ; leafets 13—15, oblpng-lan- 

 ceolate, acuminate, sharply serrate, and with the common petiole at length 

 smooth ; flowers in large compound cymes ; fruit globose, Sorbics Ameri- 

 cana Pursh. 



var. microcarpa Torr. (^ Gr.: fruit smaller, P. microcarpa D. C. 

 Sorbus microcarpa Pursh. 



Moist woods, Subarct. Amer. to Penn. N. W. Coast. Var. microcarpa on 

 high mountains, Virg. and N. Car. Torr. Sf Gr. May.— A large shrub or small 

 tree, (sometimes in Vermont 20—30 feet liigh,) with the younger branches pu- 

 bescent. Flowers very numerous, white. Styles 3—5. Fruii somewhat acid, 

 bright-red when ripe, remaining on the tree during the wmter. 



Mountain Ash. 



*** Petals spreading, with claws. Styles 2—5. Leaves simple, glandulai 

 on the midrib above. Pome turbinate or globose. Adenorachis. 



4. P. arhitifolia Linn. :. leaves obovate, oblong or lanceolate, acute or 

 acuminate, crenate-serrate, smooth above, veiny beneath, with two rows of 

 glands on the midrib ; flowers in corymbs ; fruit nearly globose. 



var. 1. erythrocarpa Tmr. ^ Gr.: calyx peduncles and lower surface 

 of the leaves tomentose, especially when young ; fruit dark-red. P. arbu- 

 tifolia D. C. Aronia arbutifolia Nutt. 



var. 2. melanocarpa Torr. ff- Gr. : calyx peduncles and leaves smooth 

 or nearly so ; fruit purphsh-black. P. melanocarpa Willd. Aronia arbu- 

 tifolia Pers. 



Low woods or bogs. Can. to Geor. May, Jime.— A shrub 2—5 feet high, 

 branching. Flowers numerous, reddish- white, in cymes or compound corymbs. 

 Fruit 2 or 3 lines in diameter, dark-red or nearly black, sweetish and astrm- 

 gent. Choke-berry. 



Order XLI. SANGUISORBACEJE.— Sanguisorbs. 



Calyx 3 — 5-lobed, with a thickened tube. Petals none. 

 Stamens few or definite. Ovary solitary, simple, enclosed in 

 the tube of the calyx ; stigma simple or compound. Nut 



*5 



