SORBUS 



SORGHUM 



1689 



pinnately lobed with broad and short, irregularly ser- 

 rate lobes and 5-8 pairs of veins, whitish tomentose be- 

 neath, 2^-4 in. long; petioles %-% in. long: fls. about 

 % in. across, in broad, tomentose corymbs: fr. orange- 

 red, globose or subglobose, about K in. high. May. 

 Northern and middle Europe, — This is sometimes con- 

 founded with iS. hi/brida and considered to be a hybrid 

 of similar origin, but it is certainly a good species. It 

 never bears distinct leaflets at the base and the sinuses 

 do not reach farther than one-third toward the middle. 



11. flabellifdlia, S. Schau. (P^rus Aria,\fir. flabelli- 

 folia, Arb. Kew. Aria flabellifblia, Decne. S. flabel- 

 Iclta, Hort.). Small tree, attaining 20 ft.: Ivs. orbicular 

 to broadly oval, obtuse, usually broadly cuneate at the 

 base, incisely lobed above the middle, with the short 

 lobes truncate or rounded and coarsely toothed, snowy 

 white beneath, 1>^-2K in. long: fls. scarcely K in. 

 across, in dense, white-tomentose corymbs: fr. de- 

 pressed-globose, orange-red. Southeastern Eu., W. 

 Asia. — Cult, in some nurseries as Pyrus aurea striata. 



12. Aria, Crantz (P^rus Aria, Ehrh. Aria nivea, 

 Hort. Hdhnia Aria, Med.). White Beam-tree. Fig. 

 2354. Tree, with broadly pyramidal or oval head, 

 25-50 ft. high: Ivs. roundish obovate to oblong-oval, 

 usually cuneate at the base, acute or obtuse at the apex, 

 sharply and doubly serrate, of firm texture, bright or 

 dark green and glabrous above, white-tomentose be- 

 neath, 2-5 in. long; petioles }i-% in. long: fls. J^-% in. 

 across, in tomentose, 2-3-in. broad corymbs: fr. sub- 

 globose, orange-red, about }4 in. high. May. Middle 

 and southern Europe to Himalayas and Siber. — De- 

 sirable tree for dry and exposed situations, and very 

 ornamental in foliage on account of the contrasting 

 colors of the upper and under sides of the leaves. Sev- 

 eral vars. are known. Var. Cr^tica, Lindl. {Aria Grceca, 

 Decne. ) . Lvs. orbicular-obovate, coarsely doubly serrate, 

 13^-3 in. long, with 6-10 pairs of veins. Southern Eu. 

 Var. Decaisned,na, Rehd. (Aria Decaisnedna, Lav. 

 P^rits Decaisnedna, Nichols.). Lvs. elliptic to oblong- 

 ovate, acute, irregularly doubly serrate, 3-6 in. long: 

 stamens longer than petals: fr. oval. Probably from 

 the Himalayas and sometimes cult, as S. NepaUnsis. 

 Var. 6dulis, Wenzig (Pyrus eduUs, Willd.). Lvs. ellip- 

 tic-oblong to oblong, rounded or acute at the apex, 

 2-5 in. long: fr. oval, yi-% in. high. There are some 

 garden forms, as vars. aiirea, clirysophj'lla and lut6s- 

 cens, with more or less yellow foliage. 



(Aronia group, species JVos. IS and 14.) 



13. arbutifdlia, C. Koch (Pyrus arhutifblia, Linn. f. 

 Aronia arbutifdlia, Elliot. A. pyrifolia, Pers. Mispi- 

 lus arbutifdUa,\&v. erythrocdrpa, Michx. ) . Red Choke- 

 berry. Upright shrub, 6-12 ft. high: lvs. short-peti- 

 oled, oval to oblong or obovate, acute or abruptly acu- 

 minate, crenately serrate, glabrous above except some 

 glands on the midrib, whitish or grayish green and to- 

 mentose or pubescent beneath, lK-3 in. long: corymbs 

 tomentose, few to many-fid., 1-13^ in. broad: fls. white 

 or tinged red, %-}4 in. across: fr. subglobose or pear- 

 shaped, bright or dull red, about 34 across. April, May. 

 Nova Scotia to Minn., south to Fla. and La. B.M. 3668. 

 G.F. 3:417. 



14. melanocdrpa, C. Koch (P?)rMs rtijrra, Sarg. Aronia 

 nigra, Koehne. Pyrus arbutifdlia, var. nigra, Willd.). 

 Black Chokeberky. Closely allied to the preceding, 

 usually lower: lvs. oval to obovate, abruptly acuminate 

 or obtuse, pale green and glabrous or nearly so beneath : 

 calyx and pedicels glabrous or nearly so: fr. globose, 

 about /<3 in. across, shining black. Nova Scotia to On- 

 tario, south to Fla. and Mich. April-June. B.B. 2:237. 

 Var. grandifdlia, Dipp. (Pyrus grandifolia, Lindl.), has 

 larger, obovate or broadly obovate lvs. and larger fls. 

 B.R. 14:1154. Var. subpub6scens, Lindl., has the lvs. 

 pubescent beneath when young. An intermediate form 

 between the two preceding species is figured in B.R. 

 12:1006 as Pyrus floribiinda, Lindl.; similar forms are 

 found wild occasionally in the northeastern states. 

 Both species are handsome shrubs; S. melanocarpa is 

 prettier in foliage and in bloom, while S. arbutifolia has 

 showier and usually more numerous fruits. The fruits 

 of both species remain on the branches during the 

 winter. 



S. alnifblia, Wenzig (Pyrus Miyabei, Sarg. Micromeles alni- 

 folia, Koehne). Tree, 60 ft. high: lvs. obovate and abruptly 

 acuminate or ovate, serrate, glabrous at length, but on vigor- 

 ous shoots, often remaining tomentose beneath, 2-4 in. long: 

 Hs. in 6-12-fld., almost glalirous corymbs: fr. subglobose, 34 in. 

 across. Japan. Gt. 41, p. 2H;f, 284. Q.V.1:M.—S. Chamcemes- 

 pilus, Crantz (Pyras Oham»me8pihis, Poll. P. alpina, Dur. 

 Aria Chamasmespihis, Hos.). Upright shrub, 6 ft. high, allied 

 to S. Aria. Lvs. elliptic to oblong serrate, almost- glabrous. 



2354. Sorbus Aria (X 34). 



13^-23^ in. long: fls. pinkish, with upright petals, in dense 

 corymbs about l3^in. broad: fr. oval, orange to brownish red. 

 Middle and southern Europe. — S. densiflbra, Heynh. (Pyrus 

 densiflora, Spach. P. alpina, Willd., not Dur. Aronia alpina, 

 Dipp.). Hybrid of garden origin between S. Aria and S. me- 

 lanocarpa: shrub, 5 ft. high: lvs. oval to elUptic-oblong, whitish 

 tomentose beneath, 13^-3 in. long: fls. white or pinkish, in 

 dense corymbs l-l3^ in. broad: fr. pear-shaped, dark bluish 

 purple.— /S. discolor, Maxim. Closely allied to S. Aucuparia, 

 but quite glabrous: Ifts. oblong-lanceolate, larger, glaucous be- 

 neath. N. China.— jS. gracilis, Wenzig (Pyrus gracilis, Sieb. & 

 Zucc). Shrub, with pinnate lvs., those at the base of the 

 loose, few-fid. corymbs with large, incised-dentate stipules. 

 Japan. — S. Hbstii, C. Koch (Pyrus Hostii, Hemsl. P. Sudetica, 

 Tauseh. Aria Hostii, Jaeq. f.). Supposed to be a hybrid be- 

 tween S. Aria and Chamsemespilus: shrub or small tree, 12 ft. 

 high: lvs. oval to elliptie-obovate, sharply serrate: fls. pinkish, 

 in dense corymbs about 23^ in. broad: fr. globose, ovoid, red. 

 Mts. of M. Europe. Gn. 20:305. R.H. 1877:210.-5. landta, 

 Wenzig (Pyrus lanata, Don. S. majestica, Hort.). Tree, allied 

 to S. Aria: lvs. oval, sharply and doubly serrate and slightly 

 lobed, 4-7 in. long; styles 2-3, woolly: fr. globose, 3^-13^ in. 

 across. Himalayas. — S. NepaUnsis, Hort. = S. vestita; also 

 vars. of S. Aria are often cidt. under this name.— S. termi- 

 nAlis, Hort. = Photinia villosa. — .S'. trilnbata, Heynh. (Pyrus 

 trilobata, DC). Small tree: lvs. rather small, almost orbicular, 

 3-lobed, with spreading, denticulate lobes, glabrous: fls. white, 

 with 5 styles: fr. subglobose, %in. across. W. As\a..—S . vestita , 

 S. Schan. (Pyrus vestita. Wall. P. crenata, Lindl. S. Nepal- 

 ensis, Hort.). Tree, allied to S. Aria: lvs. elliptic to elliptic- 

 oblong, doiibly serrate, densely tomentose beneath, 3-7 in. long; 

 styles 5, woolly at the base only. Himalayas. G.C. II. 1:17. 



Alfred Rehder. 

 SORGHUM. The genus Sorghum is referred to An- 

 dropogon by Hackel and others, and its botanical rela- 

 tions are discussed under that name. It forms a section 

 of that genus, only one species of which is of economic 

 importance. The various cultivated varieties known as 

 Sorghum, Broom Corn, Kaffir Corn, Jerusalem Com, 

 Millo Maize, Durra, etc., are considered as having been 



