SANGUISORBACE^E. 105 



* Petals spreading, flat. Styles 5, nearly united at base. Learns simple, 

 without glands. MALUS. 



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

 somewhat angulate-lobed, smoothish ; corymbs terminal, few-flowered, on 

 long peduncles ; fruit depressed, globose. Mains 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. Crab 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. Mains angustifolia Mich. 



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

 high. Leaves and/ruii smaller than in the preceding. 



Narrow-leaved Crab Apple. 



** Petals spreading. Styles'^ 5. Leaves pinnate. SORB us. 



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

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

 smooth ; flowers in large compound cymes ; fruit globose. Sorbus Ameri- 

 cana Pursh. 



var. microcarpa Torr. fy Gr.: fruit smaller. P. microcarpa D. C. 

 Sorbus microcarpa Pursh. m 



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

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

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

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

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



Mountain Ash. 



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

 on the midrib above. Pome turbinale or globose. ADENORACHIS. 



4. P. arbutifolia 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 Torr. fy 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. <$ Gr. : calyx peduncles and leaves smooth 

 or nearly so ; fruit purplish-black. P. melanocarpa Wttld. Aronia arbu- 

 tifofia Pers. 



Low woods or bogs. Can. to Geor. May, June. 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 astrin- 

 gent. Choke-berry. 



ORDER XLI. SANGUISORBACE^. 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 



