ROSACEA. (ROSE FAMILY.) 161 



shining ; flowers solitary or 2 - 3 together on very short peduncles ; calyx-lobes as 

 long as the petals ; styles 5; fruit globular or pear-shaped, yellowish. — Sandy 

 soil, New Jersey to Virginia and southward. May. — Shrub 3° - 6° high. 



17. PYRUS, L. Pear. Apple. 



Calyx-tube urn-shaped, the limb 5-cleft. Petals roundish or obovate. Sta- 

 mens numerous. Styles 2 - 5. Pome fleshy or berry-like ; the 2 - 5 carpels or 

 cells of a papery or cartilaginous texture, 2-seeded. — Trees or shrubs, with 

 handsome flowers in corymbed cymes. (The classical name of the Pear-tree.) 



§ 1. MALUS, Tourn. (Apple.) Leaves simple: cymes simple and umbel-like: 

 pome fleshy, globular, sunk in at the attachment of the stalk. 



1. P. COronaria, L. (American Crab-Apple.) Leaves ovate, often 

 rather heart-shaped, cut-serrate or lobed, soon glabrous ; styles woolly and united at 

 the base. — Glades, W. New York to Wisconsin and southward. May. — Tree 

 20° high, with large, rose-colored, fragrant blossoms, few in the corymb, and 

 fragrant, greenish fruit. 



2. P. angustifolia, Ait. (Narrow-leaved C.) Leaves oblong or lance- 

 olate, often acute at the base, mostly toothed, glabrous ; styles distinct. — Glades, 

 from Pennsylvania southward. April. — Perhaps a variety of No. 1 . 



§ 2. ADENQRI1ACHIS, DC. Leaves simple, the mid-rib glandular along the up- 

 per side: cymes compound : styles united at the base: fruit berry-like, small. 



3. P. arbutifolia, L. (Choke-berry.) Leaves oblong or obovate, finely 

 serrate; fruit pear-shaped, or when ripe globular. — Var. 1. erythrocarpa, 

 has the cyme and leaves beneath woolly, and red or purple fruit. Var. 2. me- 

 lanocarpa, is nearly smooth, with black fruit. — Damp thickets: common. 

 May, June. — Shrub 2° - 10° high. Flowers white, or tinged with purple. 



§3. SORBUS, Tourn. Leaves odd-pinnate, with rather numerous leaflets : cymes 

 compound : styles separate : pome berry-like, small. 



4. P. Americana, DC. (Amkrican Mountain-Ash.) Nearly glabrous 

 or soon becoming so ; leaflets 13 - 15, lanceolate, taper-pointed, sharply serrate with 

 pointed teeth, bright green ; cymes large and flat ; berries globose, not larger 

 than peas ; leaf-buds pointed, glabrous and somewhat glutinous. — Swamps and 

 mountain-woods, Maine toPenn. and Michigan, and southward along the whole 

 length of the Alleghanies. June. (P. microcarpa, DC.) — Tree or tall shrub, 

 with leaflets rather shining above and scarcely pale underneath, the rhachis and 

 petiole reddish and elongated : prized in cultivation for the autumnal clusters 

 of bright-red berries. 



5. P. sambucifdlia, Cham. & Schlecht. Leaflets oblong oval, or lance- 

 ovate, mostly obtuse or abruptly short-pointed, serrate (mostly doubly) with more 

 spreading teeth, often pale beneath ; cymes smaller ; flowers and berries larger, 

 the latter (4" broad) when young ovoid, at length globose; leaf buds sparingly 

 hairy: otherwise nearly as the preceding. (Sorbus aucuparia, var. j3. Michx.) 

 — Along the northern frontiers of the United States, northward and westward 

 to the Pacific, &c. Perhaps passes into No. 4 : it is sometimes cultivated for it, 

 and nearly connects it with 



L & M— 27 



