PRUXUS 



PRUXUS 



2835 



BB. Sepals or calyx-lobes erect or erect-spreading: fls, 

 mostly 1 or 2, pedicels short or none. 



42. tomentdsa, Thunb. (Cerasus tomentosa, Wall.). 

 Small compact but wide-spreading tree, or in Amer. a 

 tree-like bush, the young growths pubescent-tomentose: 

 branches close-jointed, causing the Ivs. and fls. to be 

 numerous: Ivs. broad-oval to short-obovate, short- 

 stalked, abruptly contracted into a short point, the 

 margins incisely and sometimes unequally serrate, dull 

 and rugose above, densely pubescent-tomentose 

 beneath: fls. white as to petals but with bright red 



calyx and pedicel, small, 

 sessile, usually 1 or 2 at a 

 joint, appearing just before 

 , "''- the Ivs. or as the Ivs. begin 



to unfold, from pink buds: 

 fr. light red, globular, the 

 size of a very small cherry, 

 sessile or very short-stalked, 

 sparsely hairy, eaten in 

 Japan. N. China and Man- 

 churia. B.M. 8196. A.G. 

 12:77. G. F. 5:581. A 



3234. Prunus triloba var. plena. wort . n y hardy small tree, 



(Nearly nat size.) No. 27. making a very dense top, 



and quite unlike most other 



cherries in appearance. On floral characters the species 

 gives rise to many forms, 2 or 3 of which are in cult. 

 Var. Spaethiana, Koehne. Fls. white, appearing with 

 the Ivs., and somewhat scattered on the branches, 

 the petals about J^in. broad; calvx-lobes or sepals 

 somewhat longer than the tube. Yar. Graebneriana, 

 Koehne, differs from var. Spaethiana in the large 

 fls. (petals J^in. broad) which are crowded, and calyx- 

 lobes about equaling the short-tubular calyx-tube. 

 Var. endotricha, Koehne. Lvs. elliptic or oblong, 1-2 

 in. long, the petiole very short: fls. white, very abun- 

 dant: fr. about Hin. long and nearly as broad, dark 

 red, sparingly pilose. P. tomentosa is hardy even in 

 the Dakotas, and improved fruit-bearing races of 

 importance are likely to arise. 



43. incana, Stev. (Cerasus incana, Spach. Amyg- 

 dala-s incana, Pall. A. nana var. incana, Loud.). 

 Slender-twigged shrub of medium size (3-5 ft.): Ivs. 

 small, the petiole short and soft-hairy and glandless or 

 bearing glands at the top, the blade about 2 in. long 

 (l-'2^2 in-)) ovate-oblong, elliptic or lance-elliptic, 

 short-pointed or obtuse, finely sharp-toothed, white- 

 tomentose beneath: fls. mostly in 2's. appearing with 

 the Ivs. or just in advance of them, light rose-color, 

 about Join, across, the petals emarginate, the pedicels 

 not exceeding the bud-scales: fr. bright red, the size of a 

 pea, smooth, juicy. S. E. Eu. and W. Asia. R.H. 

 1S53 :281. B.R. 25:"58. Gt. 44, p. 243 (If.). P. Maftreri, 

 Zabel, is a hybrid of P. incana and P. pumHa. 



44. prostrata, Labill. (Cerasus prostrata, Loisel.). 

 Crooked or scraggy shrub to 6 ft., with tpmentose 

 somewhat erect or spreading branches: Ivs. 1 in. or less 

 long, short-ovate or ovate-orbicular, rarely lanceolate, 

 obtuse, serrate, mostly very white beneath, the petiole 

 short and glandless: fls. mostly single (sometimes 

 fascicled), rose-red, appearing with the Ivs., nearly 

 sessile; calyx-tube about J4in. long, cylindric, pubes- 

 cent or glabrous, the lobes oblong, obtuse, and entire; 

 petals exceeding calyx-lobes or sepals, very broad: fr. 

 J^in. diam., ovoid or nearly globular, dry, red-purple. 

 S. E. Eu. and S. W. Asia. 



45. microcarpa, C. A. Mey. (Cerasus microcdrpa, 

 Boiss. P. diffusa, Schneid.). "Shrub of variable habit, 

 7 ft. or less high, bark dark brown or tawny, branches 

 usually pubescent when young: Ivs. small (about 1 

 in. or less long), broad-ovate or ovate-elliptic or 

 lance-oblong, somewhat acute, serrate, glabrous or 

 somewhat pubescent; petioles very short, thinly 

 pubescent: fls. 2 or few together, about .^in. across, 



pale rose or white, appearing with the Ivs. or just 

 preceding them, on pedicels *>in. or less long; calyx- 

 tube reddish outside, the lobes very short and ovate 

 and ciliate; petals obovate, J^in. or less long: fr. ovoid, 

 about Jin. long, red or yellowish. Asia Minor, Persia. 

 B.M. 8360. 



AA. Fls. from a single bud above the If. -scale, rather than 

 from 2 lateral buds that spring from the scales at 

 the base of the central bud as in A (where the buds 

 are therefore typically in S's, whereas in AA they 

 are placed singly on the axial growth of the previous 

 year or are clustered on spurs): infl. umbellate 

 and sessile or branching and peduncled: petiole 

 usually long, or at least prominent: plant a tree or 

 tree-like in most species. (Typocerasus.) 



B. Sepals or calyx-lobes re flexed. 

 c. Lvs. roundish, nearly as broad as long: fl.-clusters 



on the ends of the branchlets. 



46. Mahaleb, Linn. (Cerasus Mahaleb, Mill. Prunus 

 odorata, Lam. Padus Mahaleb, Borkh.). MAHALEB 

 CHERRY. ST. LTJCIE CHERRY. Small slender tree with 

 hard glabrous branchlets: Ivs. 2-3 in. long, light green, 

 round-ovate to orbicular, abruptly very short-pointed, 

 often subcordate at base, the margins closely callous- 

 serrate: fls. small, fragrant, white, in small terminal 

 umbels in May and June (in. N. Y.), appearing when 

 the tree is in nearly full leaf: fr. very small, dark red, 

 not edible. Cent, and S. Eu. and the Caucasus. 

 Extensively imported for cherry-tree stocks, and fre- 

 quently run wild. There are several cult, forms, as: 

 var. chrysocarpa, Hort., with yellow fr. (Gn. 62, p. 181) ; 

 var. albo-marginata, Dipp., with white-edged Ivs.; 

 var. variegata, Hqrt., with variegated foliage; var. 

 pendula, Hort., with weeping or drooping branches 

 (G.M. 44:210); var. globdsa, Dieck, with rounded 

 head; var. compacta, Hort., with compact condensed 

 head; var. monstrdsa, Kirchn., has very short and 

 thick branches and branchlets; var. Cupanlana, Fiori 

 & Paol. (P. Cupaniana, Guss.), is smaller than the type: 

 Ivs. much smaller 04 to about 1 in. long): peduncles 





3235. Pninus pennsylvanica (XVi)- No. 49. 



short, 3-6-fld.: fls. smaller. Sicily. Yar. transilvanica, 

 Schur. Fls. small, numerous in the cluster; sepals re- 

 flexed. Transylvania. 



cc. Lvs. distinctly longer than broad: fl.-clusters mostly 



lateral. 

 D. Fl.-clusters branching and leafy (with prominently 



broad If. -like bracts}. 



47. Maxim&wizcii, Rupr. Tree, to 50 ft., with hori- 

 zontal branches: Ivs. obovate or elliptic-obovate, 

 coarsely double-toothed, prominently veined, glabrous, 

 rather short-acuminate, the petiole hairy and glandless 

 and about H m - long: fls. white, about %in. across, 

 long-pedicelled, appearing with the full foliage on slen- 

 der open leafy-bracted peduncled clusters, the stalks, 

 broad serrate bracts, and calyx hairy: fr. size of small 

 pea, black. Manchuria, Korea, Saghalin, Japan. A 

 distinct and attractive species. 



