102 ORDER 44.-ROSACE^E. 



' 



| PBUNUS. Drupe smooth, more or less glaucous with a bloom. Stone smooth, more 

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



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 



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

 Leaves conduplicate (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. 9, 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 Nos. 14, 15 



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

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



. d Fruit with a soft juicy pulp. Small trees. PEACH, &c No. 10 



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



1 lf 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 ; ped. short, pubescent; 

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



3 I*, 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 15f. Fruit pleasant. May. 



4 P. Cliicas* MX. Chickasaio Plum. Branches spinous ; Ivs. oblong-lanceolate or 



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

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



5 P. spinosa L. /3. inxUitia. Buttace Plum. Branches thorny ; 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. 

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



and obovoid. Long cultivated. 15f. Italy. 



7 P. pumila L. Sand Cherry. Lvs. oblanceolate or obovate, acute, subserratu, 



smooth, paler beneath ; umbels few-flowered, sessile : drape ovoid. Shrub trailing in 

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



8 P. Pennsylvanica L. Wild Eed Cherry. Lvs. oblong-ovate, acuminate, nnely 



serrate, thin, smooth ; umbels corymbons, with elongated pedicels ; drupe small, 

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



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



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

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



10 P. CERASUS L. Sour Cherry. Large Red. Moretto, &c. Branches spreading: Ivs. 

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

 cels ; drupes globous. Tree 15 20f. t 



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

 minate, smooth, shining above, unequally glandular-serrate ; petioles with 2 4 gland? ; 

 raceme long ; drupes black. Woods. 50 SOf. Bark black. May. 



1 2 P. Virgf iiiana L. Choke Cherry. Lvs. smooth, oval or obovate, short-pointed, 

 thin, not shining, with sharp, subulate serratnres, veins bearded at base ; petioles 

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



13 P. Caroliniana Ait. Cherry Laurel. Lvs. oblong-oblanceolate, acuminate, on 

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

 the leaves; drupes persistent, poisonous. Banks, S. 30 SOf. April, t 



