_P. austera._ 2. Ehrhart _Beitr._ =5=:160. 1790. _P. acida._ 3. Ehrhart _l. c._ 1790. _P. aestiva._ 4. Salisbury _Prodr._ 356. 1796. _P. plena._ 5. Poiret, in Lamarck _Enc. Méth. Bot._ =5=:671. 1804. _P. rosea._ 6. Poiret, in Lamarck _l. c._ 1804. _P. Juliana._ 7. Reichenbach _Fl. Germ. Exc._ 643. 1832, not Poiret in Lamarck, 1805. _P. hortensis._ 8. Persoon _Syn. Pl._ =2=:34. 1807. _P. Marasca._ 9. Reichenbach _Fl. Germ. Exc._ 644. 1832. _P. oxycarpa._ 10. Bechstein _Forst. Bot._ =5=:424. 1843. _P. vulgaris._ 11. Schur _Enum. Pl. Transsilv._ 954. 1866. _Cerasus vulgaris._ 12. Miller _Gard. Dict._ ed. 8:No. 1. 1768. _C. hortenses._ 13. Miller _l. c._ No. 3. 1768. _C. acida._ 14. Borkhausen, in Roemer _Arch. Bot._ =1=:11, 38. 1796. _C. austera._ 15. Borkhausen, in Roemer _l. c._ 1796. _C. Caproniana._ 16. De Candolle _Fl. Fran._ ed. 3, =4=:842. 1805. _C. nicotianaefolia._ 17. Hort. ex De Candolle _Prodr._ =2=:536. 1825. _C. bigarella._ 18. Dumortier _Fl. Belg._ 91. 1827. _C. effusa._ 19. Host _Fl. Austr._ =2=:6. 1831. _C. Marasca._ 20. Host _l. c._ 1831. _C. Bungei._ 21. Walpers _Rep._ =2=:9. 1843. _C. Heaumiana._ 22. Roemer _Syn. Rosifl._ 69. 1847. _C. tridentina._ 23. Roemer _l. c._ 76. 1847. _C. Rhexii._ 24. Hort. Gall. ex Van Houtte _Fl. Serres, sér._ 2, =7=:159. 1868. _C. cucullata._ 25. Hort. ex Koch _Dendrol._ =1=:6. 1869. [Illustration: _PRUNUS CERASUS_ (AMARELLE GROUP)] Tree low, reaching a height of twenty to thirty feet, diffuse, open-headed, round-topped or spreading, often without a central leader; trunk at maturity a foot in diameter; bark reddish-brown overlaid with ashy-gray, smooth or sometimes roughened; branches spreading, slender and more or less drooping; branchlets slender and willowy, glabrous, reddish-brown becoming darker and overspread with ashy-gray; lenticels small, numerous, conspicuous, raised. Leaves resinous at opening, more or less erect, very numerous, three to four inches long and from one-half to two inches wide, obovate to oval, folded upward, thick and firm in texture; upper surface dark green, smooth, the lower surface paler green, with more or less pubescence; apex taper-pointed or acute, base abrupt or acute; margins finely serrate, often doubly so, teeth tipped with small, dark glands; petioles from a half-inch to two inches long, slender, grooved, with a few hairs on the upper surface, tinged with red; glands from one to four, usually small, variously colored, globose or reniform, usually at the base of the blade; stipules small, lanceolate, narrow, finely serrate, early caducous.