10. R. nítida, Willd. Low, nearly or quite _glabrous throughout, the straight slender spines often scarcely stouter than the prickles which usually thickly cover the stem and branches; stipules mostly dilated_; leaflets bright green and shining, usually narrowly oblong and acute at each end; flowers solitary (rarely 2 or 3); _sepals entire_.--Margins of swamps, Newf. to N. Eng. _Naturalized species._ R. CANÌNA, L. (DOG ROSE.) Stems armed with stout recurved spines, without prickles, the branches sometimes unarmed; leaflets 5--7, elliptical or oblong-ovate, glabrous or somewhat pubescent, simply toothed, not resinous-puberulent; flowers solitary (or 2--4) on usually naked pedicels; sepals pinnatifid, deciduous; fruit oblong-ovate to nearly globular.--Roadsides, E. Penn., Tenn., etc. (Int. from Eu.) R. RUBIGINÒSA, L. (SWEETBRIER. EGLANTINE.) Resembling the last, but of more compact habit, _the leaflets densely resinous beneath and aromatic, and doubly serrate_; the short pedicels and pinnatifid sepals hispid. (Incl. R. micrantha, _Smith_; less aromatic, with oblong fruit and glabrous styles.)--N. Scotia and Ont. to S. C. and Tenn. (Int. from Eu.) 16. PỲRUS, L. PEAR. APPLE. Calyx-tube urn-shaped, the limb 5-cleft. Petals roundish or obovate. Stamens 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. MÀLUS (APPLE). _Leaves simple; cymes simple and umbel-like; pome fleshy, globular, sunk in at the attachment of the stalk._ 1. P. coronària, L. (AMERICAN CRAB-APPLE.) _Leaves ovate_, often rather heart-shaped, _cut-serrate or lobed_, soon glabrous; _styles woolly and united at base_.--Glades, Ont. and W. New York to N. C., west to Minn., Kan., and La. May.--Tree 20° high, somewhat thorny, with large rose-colored very fragrant blossoms, few in a corymb; fruit fragrant and greenish. 2. P. angustifòlia, Ait. Resembling the last, but with _leaves oblong or lanceolate_, often acute at base, mostly toothed, glabrous; _styles distinct_.--Glades, Penn. to Fla., west to S. Ind., Kan., and La. April. § 2. ADENÒRHACHIS. _Leaves simple, the midrib glandular along the upper side; cymes compound; styles united at base; fruit berry-like, small._ 3. P. arbutifòlia, L. f. (CHOKE-BERRY.) A shrub usually 1--3° high; leaves oblong or oblanceolate, mostly acute or acuminate, finely glandular-serrate, tomentose beneath; cyme tomentose; flowers white or reddish; fruit pear-shaped, or globose when ripe, small, red or purple, astringent.--Swamps and damp thickets; common, from N. Scotia to Fla., and west to Minn., Ill., Mo., and La. Var. melanocárpa, Hook. Nearly smooth throughout, with larger black fruit; leaves usually less acute.--Of apparently the same range. § 3. SÓRBUS. _Leaves odd-pinnate, with rather numerous leaflets; cymes compound; styles separate; pome berry-like, small._