ACER 



13 



sum, Arb. Muse. {A. tomentosiim, Desf. A. riibriim.var. 

 fulf/eyis, Hort.). Of moderate growth: Ivs. o-lobed, 

 pubescent beneath: fls. bright red. 

 BB. Bloom appearing with or after the Ivs., distinctli/ 



stalked. 

 c. Fls. on long, pendulous, mostly hairy pedicels, in 



almost sessile corymbs, appearing with the Ivs., 



apetalous; sepals connate. 



3. 8&ccharum, Marsh. {A. saccharlnum, Wangh., not 

 Linn. A. barbatum, Michx. ). Sugar or Rock Maple. 

 Fig. 17. Large tree, 120 ft.,v,'ith gray barls : Ivs. 3-5- 

 lobed, cordate, 3-6 in. long, with narrow and deep si- 

 nuses; lobes acuminate, sparingly dentate, usually glau- 

 cous and glabrous beneath: fr. muiNiiy wiilj .--iiira.liiig 

 wings. E. N. Amer. S.S.2:90. Em. .Lys. - An .x.rllfnt 

 street and shade treftof upright, dcn^i L:r.i\Mh. tuiiiing 

 bright yellow and scarlet in autumn. It ,[,.,-^ well in 

 almost every soil. Var. Kug-^li {A . Ji'iii/rii, Pax., ^. 

 sdccharum, var. hnrhi'itiim. Tnl.). Lvs. 3-lobed, gener- 

 ally broader than lipng, L'-.") in. :i.rciss, pale green or glau- 

 cous beneath, and at length ninstlv glabrous, coriaceous; 

 lobes nearly entire. Centr. states. S.S. 2:91, as var. 

 nigrum. 



4. nigrum, Michx. (A. saccharinum, var. nigrum, 

 Torr. & Gray. A. sdccharum, var. nigrum, Britt. ). 

 Black Maple. Pig. 18. Large tree, 120 ft., with black 

 bark : lvs. cordate, with the sinus mostly closed, gener- 

 ally 3-lobed, with broad sinuses, the sides of the blade 

 mostly drooping, green and pubescent beneath ; lobes 

 acute, entire or obtusely toothed : fr. with variable 

 wings. Centr. states. — Similar to A.saecharum, but of 

 duller appearance and less dense habit. Var. monumen- 

 tile {A. saccharinum var. monttmentAle, Temple). Of 

 upright, columnar habit. 



5. Floridinum, Chapm. i.l, /...-/ , mu-. Fl.nnla- 



«i(m, Sarg.). Tree, rarely .'.n ; ': • iruiir;,i, :,t 



thebase,3-lobed, lK-3 in. :i' ' m,..,,^ Im iir^itli ;,n.l 



mostly tomentose ; lobes ..!, i. ~. , . m : i . .,i ^li-liilv :;- 

 lobed.' Gulf states. S.S. -J.".'!, n.i. liiv 



6. grandidentatum, Nutt. 'I'lr... tun.: |,rti"l(s com- 

 paratively short; lvs. slii:tiil\ .onhiir. :i-.^ ImImiI. with 



ceous; lobes acute or obtuse, entire or slightly 3-lobed: 

 corymbs few-flowered, short-stalked. Rockv Mts. S.S. 

 2:92. 



dasycarpum). 



cc. Fls. in distinctly peduncled corymbs or short um- 

 bellate racemes, mostly erect, with petals and 

 distinct sepals. 



D. Lvs. ,i-5-lobed, with obtuse, entire or obtusely toothed 

 lobes: corymbs short-stalked : ovary pubescent : 

 winter-buds rrith several outer scales. 

 7. Itaium, Lauth. Small tree, 30 ft.: lvs. 5-lobed, 3-5 



in. long, glaucous beneath and at length glabrous; lobes 



obtusely dentate, the middle ones often 3-lobed: corymbs 



somewhat drooping : fr. with slightly spreading wings. 

 S. Eu., Orient. — A variable species, similar to a small- 

 leaved sycamore maple. Var. Hjrc&num, Pax. {A. 

 Myrcdnum, F.&M. A. Taiiricum,HoH. A.trilobdtum, 

 Hort., not Lam.). Petioles very slender, red, 2-4 in. 

 long; segments of the lvs. 3-Iobed, with straight margins. 



8. campSstre, Linn. Shrub or tree, occasionally 50 tt, 

 with corky branches : lvs. 3-5-lobed, l/^~3Kln. long, 

 grei'u and pubescent beneath or nearly glabrous; lobes 

 intiir or tlie middle ones slightly 3-lobed : corymbs 

 cr.ri, liiiry : fr. with horizontally spreading wings. 

 i',11.. W. .\sia. — Shrub or tree of moderate, dense growth, 

 with .lull LTi-en foliage, valuable for planting as under- 

 growth and i.u dry ground. Many varii-tii-s and garden 

 forms: Var. arg^nteo-variegatum, H.>rt. Lvs. with 

 large white blotclns. \'ar. pulverul^ntum, Hurt. Lvs. 

 sprinkled witli wliite. \'ar. Austriacum, l)t '. Usually a 

 tree : lvs, 'i-ldLid, with acute, uearly entire lobes. Var. 

 Tailricum, Ho(.tli. Shrub: lvs. 5-lobed; small, lobes 3- 

 lobi-d. \ar. hebecarpum, DC. Fr. and generally the lvs. 



9. Monspessulinum, Linn. {A. trilobdtum, Lam.). 

 Shrub or small tree, 25 ft. : lvs. 3-lobed, coriaceous, 1-3 

 in. across, shining above, glaucous and glabrous be- 

 neath ; lobes entire or with few obtuse teeth : corymbs 

 erect : fr. with slightly spreading wings. S. Eu., N. 

 Afr., W. Asia. — Shrtili cr small tree of slow growth, with 

 a dense, rounded heail ami in teiii|.eiate regions nearly 

 evergreen foliage, thrivin- «. 11 in ,liy situations. Var. 

 IbMcum, Koch. {A. lln'riruin . Kiel). 1. Lvs. larger, the 

 inner lobes usually slightly 3-lobed, obtuse. 



DD. Lvs, 5- or 7-lobed, green on bo(h sides; lobes pointed, 

 entire or with few pointed teeth: ovary glabrous: 

 winter-buds with several outer scales. 



10. trunc&tam, Bunge. Tree: lvs. deeply 5-lobed and 

 mostly truncate at the base, 2K-i in. across, glabrous; 

 lobes acuminate, setosely pointed, sometimes the middle 

 ones 3-lobed : fr. with short, diverging yellow wings. 

 N. China. — Hardy tree, with handsome, dense foliage. 



11. pictum, Thunb. Tree, 00 ft. : lvs. 5- or 7-lobed, 3-7 

 in. across, usually pubescent beneath when young ; 

 lobes entire, acuminate, sometimes very broad and short: 

 fls. yellow: wings of the fr. uin-iglit, Iji-own or brownish 

 yellow, hardly twice as long tis tie* niiil.t^, .Mani-linria. 

 japan. Handsome tree, with l.ii-lit ^r.-. n loli^ii:,.. Var. 

 Mdno, Maxim. Lvs. more c(. relate : wings of the fr. 

 reflexed. 



12. litum, C. A. Mey. Tree, 50 ft.: lvs. 5-7-lobed, 

 mostly cordate, 3-6 in. across, glabrous; lobes entire, 

 acuminate : fls. greenish yellow : wings 2-3 times as 

 long as the nutlets. Orient, Himalayas.— Much resem- 

 bling A. pictum, but lvs. lighter green and of more 

 membraneous texture. Var. rilbrum, Hort. (A. Cdlchi- 

 cum, var. riibrum, Hort.). Lvs. dark blood-red when 



