2830 



PRUNUS 



PRUNUS 



lobes ovate-oblong to oblong, obtuse, equaling the 

 tube, glandular on margin, mostly glabrous on exterior : 

 fr. globular or oval, bright red or yellowish and marked 

 with whitish dots, late-ripening; pit or stone mostly 

 oval, pointed at apex, the surface usually roughened. 

 Ky. and Term, to Miss., Texas, Mo., and Kans. The 

 botanical status of this group is yet doubtful, although 

 well marked in some forms. From it have come many 

 pomplogical forms, as Wild Goose, Newman, Milton, 

 Robinson, Pottawattamie, Osage, Whitaker, Jewell, 

 and Texas Belle. 



ccc. Lvs. mostly as narrow as lanceolate-ovate, or else 

 small and shortish, thin or thinnish (except P. 

 maritima), finely and usually evenly serrate, 

 becoming glabrous or nearly so (except in forms of 

 P. umbellata and P. maritima), beneath at maturity: 

 fr. mostly thick-skinned. Species of the beach 

 plum or P. maritima group, mostly plants of low 

 growth and dwarf habit. 



22. orthosepala, Koehne. Fig. 3224. A much- 

 branched spreading bush about 4 or 5 ft. high, with 

 young branchlets chestnut-colored: Ivs. oblong-lanceo- 

 late to obovate-lanceolate, about 2 in. or less long, nar- 

 rowed at base, at apex acute or acuminate, glabrous 

 and shining, serrate; petiole glandless or with 1 or 2 

 glands near apex: fls. white, or pink with age, about 

 y$n.. broad, on glabrous pedicels; calyx-lobes oblong- 

 obtuse, ciliate on margins, glabrous or nearly so on the 

 exterior: fr. late, globose, about 1 in. diam., red, white- 

 dotted, with bloom; stone oval, rounded at apex and 

 slightly pointed at base, the surface somewhat rugose. 

 Not clearly known in the wild, but probably from 

 Kans. to Texas. The Laire, grown in Kans. for the 

 fr., is perhaps to be referred here. The species was 

 founded on plants grown in the Arnold Arboretum 

 from seeds said to have been sent from S. Texas. G.F. 

 7:187 (reduced in Fig. 3224). 



23. alleghaniensis, Porter. ALLEGHANY PLUM. Fig. 

 3225. Tree, 12-15 ft., or oftener a straggling bush, usu- 

 ally not thorny, the young growth reddish and glabrous: 

 Ivs. lance-ovate to elliptic-obovate, about 3 in. and 

 less long, prominently acuminate, sharply fine-serrate, 

 pubescent on the veins beneath but becoming glabrous 

 with age; petiole usually glandless but sometimes with 

 glands at apex: fls. small (3^in. across), white, in clus- 

 ters of 2-5, appearing with or before the Ivs., the calyx 

 minutely pubescent and with narrowly oblong-ovate 

 slightly hairy lobes, the petals rpund-obovate: fr. 

 globular or ovoid, %in. or less diam., dark purple 

 with a heavy bloom, acid in flavor and often austere; 



stone somewhat obovoid and obtusish at apex, the sur- 

 face slightly roughened. Pa., Conn. S.S. 4:153. G.F. 

 3:429, from which Fig. 3225 is reduced. In a very 

 limited way the species has come into botanic gardens 

 and collections. As an ornamental subject it has merit, 

 for it bears profusely of fls. and fr. The plums, or 



3224. Prunus orthosepala 



- No. 22. 



3223. Prunus Munsoniana. The Wild Goose plum ( X \i\ stones X H) 



"sloes," are collected from the wild for the making of 

 pies and preserves. 



Var. Davisii, Wight, along gravelly ridges in the 

 northern part of the southern peninsula of Mich., 

 bearing blue frs. used locally for jellies and conserves, 

 is distinguished by Ivs. broader in proportion to their 

 length and less acuminate. From P. maritima, which 

 it resembles, it differs in the reddish color of twigs, 

 more glabrous Ivs. and pedicels, and the stone pointed 

 rather than rounded at base. 



24. umbellata, Ell. BLACK SLOE of the S. Twiggy 

 small tree (10-20 ft.), with compact head and very 

 slender glabrous branchlets, often more or less thorny: 

 Ivs. small (mostly 2 in. or less long), light green and 

 rather thin, oblong, lanceolate, oblong-lanceolate or 

 oval, obtuse or acute, closely serrulate, sometimes very 

 closely pubescent beneath even at maturity; petiole 

 without glands: fls. small to medium in size (^-/^in. 

 broad), white, on slender glabrous pedicels in few- 

 fld. umbels, appearing with or just before the Ivs. : fr. 

 small, globular, slender-stalked, from pure yellow to 

 orange-yellow and red-blotched, thinly glau- 

 cous, the flesh usually sour and bitter and free 

 from the oval or subglobose stone. Near the 

 coast from S. C. to Fla. S.S. 4:155. Not 

 intro. as a fr.-plant, but sometimes planted 

 for the profusion of its white fls. The fr. is not 

 unlike a cherry in shape, and is sometimes 

 used in conserves. The foliage suggests P. 

 cerasifera. 



Var. injucunda, Sarg. (P. injuciinda, Small. 

 P. mltis, Beadle). A hill-country form: Ivs. 

 oval or oblong-oval, usually somewhat longer 

 and broader than in P. umbellata itself, nar- 

 rowed toward the base, acute or acuminate, 

 mostly pubescent beneath and somewhat 

 pubescent above: fls. appearing later (March, 

 April) ; calyx pubescent rather than glabrous. 

 N. C. to Ga., Ala., and Miss., apparently 

 No. 21. passing into var. tarda. 



