102 ORDER 4 1.- KOSACE.E. 



f PRUNUS. Drupe smooth, more or less glaucous with a bloom. Stone smooth, more 

 or less flattened. Leaves mostly convolute (rolled) in vernation. PLUMS. . .() 



a Umbels 2-5-flowered. Leaves conspicuously acuminate No. 1 



a Umbels 2-5-flowered. Leaves acute or obtuse Nos. 2, 3, 4 



a Umbels 1-2-flowered. Leaves acute, obovate, or oval Nos. 5, 6 



CERASCS. Drupe smooth, without bloom. Stone smooth, globular. 

 Leaves conduplicatc (folded 254) in vernation. CHERRIES. . .(b) 



b Flowers in lateral leafless umbels. Drupes small. Native Nos. 7, 8 



b Flowers in lateral leafless umbels. Drupes large. Exotic Nos. 0, 10 



b Flowers in racemes c terminating the leafy branches Nos. 11, 12 



c in the axils of the evergreen leaves No. 13 



ARMENIACA. Drupe soft-velvety. Stone smooth, compressed. Lvs. 



convolute in bud, expanding after the flowers. APRICOTS Nog. 14, 15 



AMYGDALUS. Drupe tomentous or smooth. Stone rugous-furrowed, 

 compressed. Leaves conduplicate in vernation . . . (d) 



d Fruit with a soft jnicy pulp. Small trees. PEACII, &c No. Ifl 



d Fruit with a hard dry pulp. Trees or low shrubs. ALMOND. . .Nos, 17, 18, 19 



1 P. Americana Marsh. Red Plum. Yellow Plum. Somewhat thorny ; Ivs. oblong- 



oval and obovate, abruptly and strongly acuminate, doubly serrate ; drupes roundish 

 oval, reddish orange, with a tough skin. Low woods. 10 15f. May. t 



2 P. maritima Wang. Beach Plum. Lvs. oval or obovate, slightly acuminate, 



sharply serrate ; petioles with 2 glands ; umbels few-flowered ; pcd. short, pubescent ; 

 fruit nearly round. Sea beach, Me. to Va. 3 4f. Fruit size of a grape. May. 



3 P. umbellata Ell. Lvs. lanceolate or lance-oval, acute or barely acuminate, ob- 



scurely serrulate ; petioles glandless ; umbels 3-5-flowered, precocious ; fruit oval, 

 small, glaucous, red. Dry soils, South. 10 lof. Fruit pleasant. May. 



4 P. Cliicas MX. Chickasaw Plum,. Branches spinous ; Ivs. oblong-lanceolate or 



oblanceolatc, glandular serrulate, not at all acuminate ; pedicels short, smooth ; drupe 

 globous. Thickets, South. 6 12f. Fruit red or yellowish. April. 

 f P. spinosa L. ft. insititta* Buttace Phim. Branches thomy ; Ivs. pubescent 

 beneath ; obovate-elliptical, varying to ovate, sharply and doubly dentate ; umbels 

 1-2-flowered ; fruit globular, black, glaucous. Roadsides. 15 20f. 



6 P. DOMESTICA L. Common Garden Plum. Damson Plum. Branches unarmed; Ivs. 



oval or ovate-lanceolate, acute ; pedicels nearly solitary ; drupe globous, oval, ovoid, 

 and obovoid. Long cultivated, lof. Italy. 



7 P. piimila L. Sand Cherry. Lvs. oblanceolatc or obovate, acute, Bubserrato, 



smooth, paler beneath ; umbels few-flowered, sessile : drupe ovoid. Shrub trailing iu 

 sandy soils. 1 2f. Fruit small, dark red, pleasant. May. 



8 P. Pennsylvaniea L. Wild Red Cherry. Lvs. oblong-ovate, acuminate, hnely 



serrate, thin, smooth; umbels corymbou-s, with elongated pedicels; drupe small, 

 ovoid-snbglobons. Woods, N. 25f. Bark red-brown. May. 



J) P. AVIUM L. Ox-heart. English Cherry. Branches erect or ascending ; Ivs.oblong- 

 obovate, acuminate, hairy beneath ; umbels sessile, with rather long pedicels; drupe 

 ovoid-globous, subcordate at base. Gardens, parks. 30 50f. t 



IO P. CERASUS L. Sour Cherry. 'Large Red. Mordlo. rfr. Branches spreading; lv. 

 ovate-lanceolate, acute at apex, narrowed at base, nearly smooth ; fls. with short pedi- 

 cels ; drupes globous. Tree 15 20f. t 



IIP. serotliia Ehr. Black or Wild Cherry. Lvs. firm, oval-oblong or elliptic, acu- 

 minate, smooth, pinning above, unequally glandular-serrate ; petioles with 2 4 glands; 

 raceme long : drupes black. Woods. 50 80f. Bark black. May. 



12 P. Vfrginia.na L. Choke Cherry. Lvs. smooth, oval or obovate, short-pointed, 

 thin, not shining, with sharp, subulate scrratnres, veins bearded at base : petioles 

 with 2 glands : raceme short. Thickets. 5 20f. Fruit blackish, astringent. May. 



13 P. Caroliniiina Ait. Cherry Laurel. Lvg. oblong-oblanceolate. acuminate, on 

 short petiole?, entire, coriaceous ; fls. small, in numerous, dense- racemes shorter than 

 tho leaves; drupe? perriPfcnt. DoiFonous. Bank. S. ?,\i- 50 f. April, t 



