ACER 



19. Pseildo-pWtanuB, Linn. Sycamore Maple. Tree, 



70 ft. liii^h; Ivs. r)-|ol.ed, coarsely crenate-serrate, 3K-7 

 in. across, ill. 'I. ;,'iii-u above, glaucous and mostly gla- 

 bruu-s bcuuath : rai-L-nie.s pendulous : fr. glabrous. Eu., 

 Caucasus. — Large tree of vigorous growth, with large, 

 spreading head ; thrives well even in exposed situations. 

 Many varieties and garden forms: 

 Var, villdsum, Prsl. Lvs. eharta- 

 ceiius, puliist-fnt beneath. Var. 

 purpurascens, Pax. {vars. purpii- 

 rriim and alropiirpiiretim. Hort.). 

 Lvs. purplish red bnii-ath ; nf ro- 

 bust growth. Var.Hand,ieryi,S|i;itli. 

 (va,T.Prinz Haiuljrrii.Uort.). Lvs. 

 purplish beneath, briLrht red when 

 uiifiildinR. Var. W6rleei, Hort. (var. 

 lut.'sriiis. Hurt. 1. Lvs. yellow. Var. 

 41bo-variegitum, Hort. Lvs. with 

 wliiti' l.li.trlii's and spots. Var. tri- 

 color, Hurt. Lvs. .spotted with red, 

 chaii(;iiiL,' to white. 



20. HSldreichi, Orph. Tree: lvs. 

 5-1iiIm-i1. the middle incisions reach- 

 ing nearly to, the outer half way to 

 the base, 3-5 in. across, glabrous, 

 dark green and shining above, 

 glaucous beneath ; lobes coarsely 

 and douhlv serrate : panicle erect, 

 lone-stalked, ovate. S. E. Eu. Gt. 

 34:IKKri. ».!.(_'. n. lG:lil. 



21. Traitvetteri, Medw. {A. velufinum, Hort., not 

 Boiss.). Lvs. slightly cordate, deeply 5-lobed, 5-7 in. 

 across, glaucous beneath and pubescent when young ; 

 lobes coarsely crenate-serrate: panicle erect, ovate. Cau- 

 casus. Gt. 40, pp. 264-260. B.M. 6097.- Similar to A. 

 insiyne, but hardier and with smaller leaves. 



22. insigme, Boiss. & Buhse. Largetree: Ivs. 5-lobed, 

 deeply cordate, 5-10 in. across, bright green above, glau- 

 cous beneath ; lobes broad, coarsely crenate-serrate : 

 panicles large, erect. Caucasus, N. Persia. G.C. HL 

 10: 189. — Remarkable for its large, handsome foliage; 

 not hardy in the Nortli. May be divided into two varie- 

 ties: Var. Van Volxemi, Pax. {A. Van \'ol.Temi, Mast.). 

 Lvs. at length glabrous beneath. Var. Teldtinum, Boiss. 

 Lvs. densely pubescent beneath. 



DD. I^vs, mostly 3-lobed or without lobes, green beneath. 



2.'). TaUricum, Linn. Shrub or small tree, 20 ft.: lvs. 

 roundish oval or oblong, cordate, sometimes slightly 

 lobed, 2^ in. long, doubly serrate, nearly glabrous: fls. 

 in long peduncled panicles, white. S. E. Eu., Orient. 



— Round-headed small tree, growing best in somewhat 

 moist soil. 



24. GinnMa, Max. {A. Tatdricwm, var. Ginniila, 

 Hort.). Fig. 21. Shrub or small tree, 20 ft. : lvs. 3-lobed, 

 l)'2-3>^in. long glabrous, the terminal lobe elongated, 

 doubly serrate : fls. in long peduncled panicles, yel- 

 lowish, fragrant. Manchuria, N. China, Japan. Gt. 

 1877 : 308. — Graceful shrub, with handsome foliage, turn- 

 ing bright red in autumn; may be used as a substitute 

 for the Japanese maples where these are not hardy. 

 Var. Semendvi, Pax. _(A. Semendvi, Regel.). Shrub: 

 lvs. smaller, deeply 3- or nearly 5-lobed. Turkestan. 



25. spic&tum, Lam. Moiintaim Maple. Shrub or 

 small tree, rarely .SO ft.: lvs. 3- or slightly 5-lobed, 

 coarsely serrate, pubescent beneath, 2K-4i4 in. long: 

 racemes rather dense, long, upright: fr. with diverging 

 wings, bright red in summer. E.N.Am. S.S. 2:82, 83. 



— Valuable as undergrowth; lvs. turn yellow and scarlet 

 in fall. 



26. ruHnSrye, S. & Z. Tree with striped bark : 

 branches glaucous when young : lvs. rounded at the 

 base, 3-lobed, 3-5 in. long, doubly serrate, ferrugiue- 

 ously pubescent beneath when young : racemes ferni- 

 gineouslv jmbcscent. Japan. S.Z. 2:148. Var. Albo-lim- 

 b4tum, liniik. Lvs. edged with white. B.M. 5793. 



27. Pemi3ylv4nicuin,Linn.(jl.s/rJii(M»i,Dur). Striped 

 Maple. Moosewood. Tree, rarely 40 ft. : bark greenish, 

 striped with white lines: lvs. slightly cordate, roundish - 

 obovate, 3-lobed at the apex, 6-8 in. long, finely serrate, 

 ferrugineously pubescent beneath when young: racemes 



ACER 



15 



glabrous, drooping. E. N. Amer. S.S. 2 :84, 85. Michx. 

 Hist. Arb. 2:17. Era. 566.— Handsome medium-sized 

 tree of upright, dense habit, with bright green, large 

 foliage, turning clear yellow in autumn, and attractive 

 even in winter from its smooth, greenish bark, striped 

 with white. 



18. Black Sugar Maple. — Acer nierum. 



PDD. Jyvs. not Johed, penninerved, doubly serrate, 

 acuminate. 



28. carpinifdlium, S. & Z. Hornbeam Maple. Tree, 

 30 ft.: lvs. oblong-ovate, acuminate, sharply and doubly 

 serrate, nearly glabrous, 3-6 in. long : raceme few-fld. 

 S.Z. 2:142. G.C. H. 15:564.-Very distinct, hardy spe- 

 cies; the lvs. are almost exactly like those of Carpinus. 



AA. Foliage of S-6-foliolate lvs. {cf. No. 14): fls. 

 dicecious. 

 B. Petioles and young brandies with a rufous, villous 

 tomenfuni: fls. in terminal fetv -flowered racemes: 

 winter-buds with many scales. 



29. Niko6iiset Max. Tree, 40 ft. : leaflets ovate or ob- 

 ovate, acute, entire or coarsely serrate, 2-5 in. long, 

 villous-pubescent beneath: fr. hairy, with large wings. 

 Japan. G.F. 6: 185. — Very distinct; lvs. turning bril- 

 liant scarlet in autumn. 



BB. Petioles and branches smooth or velvety pubescent: 



fls. in long lateral racemes: winter-buds with S 



or 4 outer scales. 



30. cissiidlium, Koch. {Negiindo cissifoUum, S. & Z.). 



Small tree: leaflets ,'!, long-stalked, ovate or elliptic, 



cuneate, coarsely serrate, ciliate, 2H-4 in. long: fls. in 



