ROSACEA. (ROSE family.) 123 



5. R. rubigincsa, L. (True Sweet-Brier.) Climbing high; prickles 

 numerous, the larger ones strong and hooked, and the smaller awl-shaped; leaflets 

 doubly sen-ate, rounded at the base ; downy and clothed with fragrant russet 

 ulands beneath ; fruit pear-shaped or obovate, crowned with the persistent calyx-lobes. 

 — Road-sides and thickets. June -Aug. (Nat. from Eu.) 



6. R. hicrantha, Smith. (Smaller-fl. Sweet-Brier.) Prickles uni- 

 form and hooked ; fruit elliptical and urate; calyx-lobes deciduous; flowers smaller : 

 otherwise as No. 5. — E. New England. (Nat. from Eu.) 



Suborder III. POMEJE. The Pear Family. 



16. CRATAEGUS, L. Hawthorn. White Thorn. 



Calyx-tube urn-shaped, the limb 5-cleft. Petals 5, roundish. Stamens many, 

 or only 10-5. Styles 1-5. Fruit (calyx-tube) fleshy, containing 1 - 5 bony 

 1-seeded carpels. — Thorny shrubs or small trees, with simple and mostly lobed 

 leaves, and white (rarely rose-colored) blossoms. (Name from Kpdros, strength, 

 on account of the hardness of the wood.) 



* Corymbs many-flownid. 



■*- Fruit very small, depressed-globose (nut larger than peas), bright red: flowers small: 



calyx-teeth short and broad: styles 5 : plants glabrous and glandless throughout. 



1. C. spntlitilfitn, Michx. Leaves thickish and shirting, spatulate or obltsar 

 ceolate, with a hug tapering base, crenate above, rarely cut-lobed, nearly sessile. — 

 Virginia and southward. May. — Shrub 10°- 15° high. 



2. C. cord fa In, Ait. (Washington Thorn.) Leaves broael/y ovate or 

 triangular, mostly truncate or a little heart-shaped at the base, on a slender petiole, 

 variously 3 - 5-cl •/? or cut, and senate. — Virginia, Kentucky, and southward. 

 June. — Trunk 15° -25° high. 



«- +- Fruit small (¥ - $' long), ovoid, deep red : flowers rather large : styles 1 -3. 



3. C. Oxyacantiia, L. (Engeish Hawthorn.) Smootli ; leaves obovate, 

 cut-lobed and toothed, wedge-form at the base; calyx not glandular. May. — 

 More or less spontaneous as well as cultivated. (Adv. from Eu.) 



4. C npiifolin, Michx. Softly pubescent when young, becoming jrla^ 

 brous ; leaves roundish, with a broad truncate or slightly heart-shaped base, pin- 

 nately 5-7-cleft, with the crowded divisions cut-lobed and sharply serrate; 

 petioles slender ; calyx-lobes glandular-toothed, slender. — Virginia and south- 

 ward. March, April. 



*-+-+- Fruit large (|'-§' long), red; flowers large: styles and stones of the fruit 

 even in the same species 1-3 (when the fruit is ovoid or pear-shaped) or 4-5 (when 

 the fruit is globular) : stipules, calyx-teeth, bracts, frc. often beset ivith glands. 



5. C. cocccncn, L. (Scarlet-fruited Thorn.) Glabrous through- 

 out; leaves thin, roundish-ovate, sharply toothed and cut, or somewhat cut-lobed, 

 usually abrupt at the base, on slender petioles ; flowers white, often with a rosy 

 tinge (3' broad); fruit bright scarlet-red, ovoid (^' broad), scarcely edible. — ■ 

 Thickets and rockv banks ; common. May. — A low tree. 



