ACEK 



sum, Arb. Muse. (-4. tomentdgitvi, Desf, A. ritbrittn, var. 

 fnlqens, Hort. ). Of moderalp growth; Ivs. 5-lobed, 

 pubescent beneath: lis. bright red. 



BE. Bloovi appearing with or after the h's., distinctly 



stalked, 

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



iilmnst sessile corymbs, appearing with the Ivs., 



itjH'tdlous; sepals connate. 

 :t. s&ccharum, Marsh. {A. sact-harhium, Wangh., not 

 Linn. .1. barbatum, Michx.). .Simsak or Rock Maple. 

 Fig. 17. Large tree, 120 ft., witli Ki':iy b;irk : Ivs. 3-5- 

 lobed, cordate, 3-0 in. long, with nurrcw and deep si- 

 nuses; lobes acuminate, sparingly dentate, usually glau- 

 cous and glabrous beneath; fr. mosily with spreading 

 wings. E. N. Amer. S.S. 2;90. Em. . 158.— An excellent 

 street and shade tree of upright, dense growth, turning 

 bright yellow and scarlet in autumn. It does well in 

 almost every soil. Var. Bug^li (A. Jiiicieli. Pax., .-1. 

 s iecharum, YtiT. barbHtiitn, Trel.). Lvs. 3-lobed, gener- 

 ally broader than long, 2-.1 in. across, pale green or glau- 

 cous beneath, and at length mostly glabrous, coriaceous; 

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

 nigrum. 



4. nigrum, Michx. (A. sacchartnum, var. ntgrum, 

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

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

 bark; Ivs. cordate, with the sinus mo.stIy closed, gener- 

 ally 3-Iobed. with l.n.ail sin\ises, the sides of the blade 

 mostly drooping, green and pubescent beneath ; lobes 

 acute," entire or .ilptuselv toothed : fr. with variable 

 wings. Centr. states. — Similar to ..4. saccAar?/m, but of 

 duller appearance and less <lense habit. Var. monumen- 

 tile lA. siiechinhnim var. tnnnumentdle. Temple). Of 

 upright, columnar habit. 



5. Floridinum, Chapm. {A. barbdtum, var. FloridA- 

 nnm, Sarg. ). Tree, rarely 50 ft.; Ivs. mostly truncate at 

 the base, 3-Iobed, l%-3 in. across, glaucous beneath and 

 mostly tomentose ; lobes obtuse, entire or slightly 3- 

 lobed. Gulf states. S.S. 2;9L G.F. 4;148. 



0. grandidentitum, Nutt. Tree, 40 ft.; petioles cora- 

 parativ.'ly short ; Ivs. slightly cordate, 3-5-Iobed, with 

 broad sinuses. '2-'A in. across, pubescent beneath, coria- 

 ceous; lobes acute or obtuse, entire or slightly 3-Iobed; 

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

 2; 92. 



ACER 



13 



15. Acer sacchari 



A. dasycarpum). 



cc. Fls. in distinctly pedunc led corymbs or short um- 

 bellate racemes, mostly erect, with petals and 

 distinct sepals. 



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

 lobes: corymbs short-stalked : ovary pubescent : 

 winter-buds with several outer scales. 

 7. Italum, Lauth. Small tree, 30 ft. : Ivs. o-lobed, 3-5 



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



obtusely dentate, the middle ones of ten 3-lobed : corymbs 



somewhat drooping : fr. with slightly spreading wings. 

 S. Eu., Orient. — A variable speoit*s, similar to a small- 

 leaved sycamore maple. Var. HyTcinum, Pax. {A. 

 Hyrcdnutn,F.&U. A. Taurie urn, Hort. A.trilobdtum, 

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

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



16. Red Maple— Acer rubrum. 

 b. staniiuate Hdwers: a, c, pistillate flowevs. 



8. camp6Btre, Linn. Shrub or tree, occasionally 50 n , 

 with corky branches : lvs. ,3-5-lobed, lj^2-334in. long, 

 green and pubescent beneath or nearly glabrous; lobes 

 entire or the middle ones slightly 3-lobed : corymbs 

 erect, hairy : fr. with horizontally spreading wings. 

 Eu., W. Asia. — Shrub or tree of moderate, dense growth, 

 with dull green foliage, valuable for planting as under- 

 growth and on dry- ground. Many varieties and garden 

 forms : Var. ar*g6nteo-variegatum, Hurt. Lvs. with 

 hiriT'- wliiti- I'lot'-ln-s. Var. pulverul6ntum, Hort. Lvs. 

 sjiriiiklrd with wliitr. Var. Austriacum, DC. Usually a 

 tn-<- : lvs. .-.-lol.t'd. witli a.'ute. lu-arly t-iitire lobes. Var. 

 Tailricum, Booth. Shrub: lvs. 5-lo'bed; small, lobes 3- 

 lobed. Var. hebecArpum, DC. Pr. and generally the lvs. 

 beneath pubescent. 



9. Monspessul^num, Linn. {A. trilobhtum. Lam.). 

 Shrub or small trer, 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. — Shrub or small tree of slow growth, with 

 a dense, rounded head and in temperate regions nearly 

 evertrreen foliage, thrivinir well in dry situations. Var. 

 Ib^ricum, Koch. (-1. fhtrinnn, Bieb.). Lvs. larger, the 

 inner lobes usually slightly 3-lobed, obtuse. 



DD. Lvs. 5- or 7-lobed, green on both sides; lobes pointed, 

 entire or with few pointed teeth: ovary glabrous: 

 irinfer-buds with several outer scales. 



10. truncitum, Bunge. Tree: lvs. deeply 5-lobed and 

 mostly truncate at the base, 2%-A. 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, 60 ft.: lvs. 5- or 7-lobed, 3-7 

 in. across, usually pubescent beneath when young ; 

 lobes entire, acuminate, sometimes very broad and short: 

 tls. yellitw: wings of the fr. upright, brown or brownish 

 yellow, hardly twice as long as the nutlets. Manchuria, 

 Japan. Handsome tree, with bright green foliage. Var. 

 H6no, Maxim. Lvs. more cordate : wings of the fr. 

 reHexed. 



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

 mostly cordate, ^6 in. across, glabrous; lobes entire, 

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

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

 bling ^-1. pirfum, but Ivs. lighter green and of more 

 membraneous texture. Var. riibrum, Hort. (A. CV>lcki- 

 cnm, var. rubrum, Hort,). Lvs. dark blood-red when 



