SORBUS 



A. Foliage pinnate. 



B. JJvs. regularly pinnate, with the 



Ifts. of almost equal size. 



c. Fruits small, Si-% in. across 



or slightly larger, be? ry-like. 



(Aucuparia group, i,pecies 



D. Winter -buds covered with 



white villous tomcntum. 



E. yotmg branch ht sand /r.s. 



pubescent 



EE. Young branchlett, and ii.->. 



glabrous 



DD. Winter-buds glutixotis, gla- 

 brous or sparingly ap- 

 pressed, rusty-pubescent. 

 E. Lfts. long-acuminate: fls. 

 Vs-H in.: fr. X-Ji in. 



SORBUS 



1687 



1. Aucuparia 



2. Tianschanica 



Foil, 



B. Styiii, J. <)ii6 1)1 iiirely shrubs. 



C. Under side of Irs. glabrous at 



length, green: lvs. lobed: fr. 



brown, tcith grit-cells. [Tor- 



minaria group, species _ 



No. 8.) 8. torminahB 



CO. Under side of lvs. grayish or 

 whitish tomentose. (Aria 

 group, species 9-12.) 

 D. Lvs. lobed. (See also No. 6.) 

 E. Pairs of veins B-9. 



F. Base of the usually 



idli. 



latifoUa 



mostly rounded 



pp. Base of the ovate to ob- 

 long -ovate lvs . 



broadly cuneate 10. intermedia 



EE. Pairs of veins S-5; under 

 side of veins densely 

 snowy white, tomentose.il. flabellifolia 

 DD. Lvs. not or but obscurely 



lobed; pairs of veins 6-12.12. Aria 

 BB. styles 5,: shrubs with crenately 

 serrate lis. {Arnnia [Adcno- 

 rliachis] group, species 13-14). 





■Jth . 



LI. arbutijolia 



with the lfts. pinnately lobed and the leaf-stalks and 

 young branchlets bright red. Var. fastigi&ta, Loud., 

 forms a narrow pyramidal tree, with upright branches. 

 Var. p6ndula, Hort., has long and slender pendulous 

 branches. Var. B688ica, Hort., seems little or not dif- 

 ferent from var. dulcis. Var. fnictu liteo and var. Fi- 

 fe4na, Hort., have yellow fruits. There are vars. with 

 variegated foliage of the typical and of the weeping 

 form. The fruits of S. Aucuparia, S. domestica, tor- 

 minalis and var. dulcis are edible, and the strong and 

 close-grained wood of .s". domestica and S. torminalis, 

 and in a lesser degree tluit of S. Aucuparia, is valued 

 for handles of tools and similar small articles. See 

 Pijrus. 



2. Tlanschinica, Rupr. (Piirus Tliianschdnica, 

 Regel). Small tree or shrub, similar to the preceding: 

 young branchlets glabrous, red-brown and glossy when 

 older: petioles andlvs. glabrous: lfts. 11-15, lanceolate, 

 acuminate, serrate, entire toward the base, dark green 

 and glossy above, lisht grein beneath, about 2 in. long: 

 corymbs 'glabrous r stamens half as long as petals: 

 styles 2-5: fr. globose, bright red. May, June. C.Asia. 

 Gt. 40, p. 8. B.M. 7755. — Very handsome on account of 

 the contrast of its dark green foliage and red-brown 

 branches. 



3. Americana, Marsh. (Piiru,-. i ,„,.,-,v.>,,.,, nC. S. 

 j»iC«/H«i(i, Dum-Cours.). Amii'-- M.---imnAsh. 

 Dogberry. Fig. 2352. Small ti. i It,, with 

 spreading branches, or sometiiih in-. 11-17, 

 lanceolate, long-acuminate, shaii'l} ri i :,-. . L^lal.rous or 

 slightly pubescent when young, light green above, paler 

 beneath, 13^-4 in. long: fls. one-flfth to H in. across, in 

 dense, 3-6-in. broad, usually glabrous corymbs: fr. glo- 

 bose, bright red, J^-K in. across, with the calyx-lobes 

 very small and connivent. May, June. Newfoundland 



(Aucuparia group, sped 



.14. mtlanocarpa 



1-4.) 



-J \ 



2351 Sorbus Aucuparia. 



European Mountain Ash. Rowan Tree. Fig. 2351. 

 Round-headed tree, 20 to 40, occasionally 60 ft. high: 

 young branchlets pubescent, grayish brown when older: 

 petioles more or less tomentose : lfts. 9-15, oblong to 

 oblong-lanceolate, serrate, entire toward the b.ise, dull 

 green above, pubescent beneath or rarely glabrous, %- 

 2 in. long: fls. white, % in. across, in flat, 4-0-in. broad, 

 tomentose or sometimes almost glabrous corymbs; sta- 

 mens about as long as petals : fr. globose, about K in. 

 across, bright red. Mav, June. Europe to W. Asia and 

 Siberia.-Var. dtilcis, Kra>tzl. (var. Mordvica, Zengerl.). 

 Almost glabrous: petioles purplish; lfts. oblong-lanceo- 

 late, 2-3 in. long, glaucescent beneath. The fruits are 

 of an agreeable acid flavor and recommended for pre- 

 serves. The tree thrives well in cold northern climates 

 where hardly any other fruit tree will grow. Var. diilcis 

 Jacinl4ta, Beissn,, is a handsome and graceful form 



w 



to Manitoba, south to Mich, and N. C. S.S. 4:171. 172. 

 - Var. microcirpa, Torr. & Gray ( S. m icrocdrpa , Pursh ) , 

 has narrower foliage and very small fruits about J-e in. 



4. sambuciSdlia, Roem. (Pi)rus sambucifblia, Cham. & 

 Schlecht.). Western Mountain Ash. Small tree or 

 shrub, closely allied to the preceding: lfts. 7-15, oval to 

 ovate-lanceolate, obtuse to short-acuminate, sharply ser- 

 rate, glabrous and dark green above, glaucescent and 

 usuallv pubescent beneath when young, lH-3 in. long: 

 fls. M-Js in. across, in 2-4-in. broad and rather loose 

 corymbs, sometimes few-fld.: fr. globose, ovoid when 

 young, red, about Vx in. across, with more or less up- 

 right calyx-lobes. June, July. Labrador to Alaska south 

 to Pa., Mich, and Calif., N. E.Asia and Japan. S.S. 



