Vo. II.] APPLE FAMILY. 233 
1. SORBUS L, Speelea7769 L753: 
Trees or shrubs, with alternate pinnate leaves, serrate leaflets, deciduous stipules, and 
perfect regular white flowers, in terminal compoundcymes. Calyx-tube urn-shaped, 5-lobed, 
not bracteolate. Petals 5,spreading, short-clawed. Stamens«. Ovary inferior; styles usu- 
ally 3, distinct; stigma truncate; ovules 2 in each cavity. Fruit a small red berry-like pome, 
its carpels not cartilaginous. [The ancient Latin name of the Pear or Service-tree. ] 
A genus of about 7 species, natives of the north temperate zone. Besides the following, another 
occurs in western North America. 
Leaflets long-acuminate; fruit 2'’-3’’ in diameter. 1. S. Americana, 
Leaflets obtuse or short-pointed; fruit about 4’’ in diameter. 2. S. sambucifolia. 
1. Sorbus Americana Marsh. American 
Mountain Ash. Dogberry. (Fig. 1975.) 
Sorbus Americana Marsh. Arb. Am. 145. 1785. 
Sorbus microcarpa Pursh, Fl. Am. Sept. 341. 1814. 
Pyrus Americana DC. Prodr. 2: 637. 1825. 
A small tree, with smooth bark, reaching a maxi- 
mum height of 30° and a trunk diameter of 18’, 
Leaf-buds acute; leaves petioled; leaflets 11-17, lan- 
ceolate, long-acuminate, glabrous on both sides or 
slightly pubescent when young, bright green above, 
generally paler beneath, 114/-4’ long, sharply serrate 
with mucronate teeth; cymes densely compound, 
3/-6’ broad; flowers 2//-3/’ broad; fruit globose, 
bright red, 2’’-3/’ in diameter. 
In low woods or moist ground, Newfoundland to 
Manitoba, south, especially along the mountains, to 
North Carolina and to Michigan. Wood soft, light 
brown; weight per cubic foot 34 Ibs. Called also Amer- 
ican Service Tree. A closely related or identical form 
occurs in Japan. May-June. 
2. Sorbus sambucifolia (C. &S.) Roem. Western Mountain Ash. (Fig. 1976.) 
Pyrus sambucifolia C. & S. Linnaea, 2: 36. 1827. Bek ye ye) - 
Sorbus sambucifolia Roem, Syn. Mon, 3:39. 1847. — GSB x) 
A small tree or often a shrub, closely resembling 
the preceding species. Leaf-buds acute; leaflets 
7-15, proportionately broader and shorter, oval or 
ovate-lanceolate, obtuse or short-pointed at the apex, 
sharply serrate, glabrous and dark green above, pale 
and usually more or less pubescent beneath, especi- 
ally along the veins, seldom over 3’ long; flowers ‘&~ 
3/’-34’ broad; calyx and pedicels generally pubes- 
cent; cymes 2/—4’ broad; fruit globose, red, about 4/’ 
in diameter. 
In moist ground, Labrador to Alaska, northern New 
England, Pennsylvania, Michigan, and in the Rocky 
Mountains to Coloradoand Utah. Wood similar to that 
of the preceding; weight per cubic foot 37 lbs. Occurs 
also in northeastern Asia. June-July. 
Sorbus Aucuparia I,., the European Mountain Ash, 
Rowan Tree or Quick-beam, has the leaves pubescent 
on both sides, especially when young, the calyx and 
pedicels usually woolly. Often planted; reported as 
escaped from cultivation in Prince Edward Island. 
2. PYRUS L. Sp. Pl. 479. 1753. 
Trees, or some species shrubs, with simple leaves. Flowers large, showy, white or pink, 
in simple terminal cymes. Calyx urn-shaped, 5-lobed, the lobes acute. Petals 5, rounded, 
short-clawed. Stamens usually numerous; styles mostly 5, distinct, or united only at the 
very base; ovules 2 in each cavity; carpels cartilaginous or leathery. Fruit a pome, usually 
pear-shaped, its flesh abounding in grit-cells. [Latin name of the Pear. ] 
About 12 species, natives of the Old World. 
