ACER 



ACER 



199 



Jacq. Similar to var. Lorbergii. but with darker foliage 

 and of slower growth. Var. globosum, Nichols. Form- 

 ing a globose head. M.D.G. 1903:189. G.W. 5, 

 p. 14. Var. laciniatum, Ait. Lvs. irregularly divided, 

 the divisions bending downward : growth upright. Gt. 

 42, p. 584. Var. Lorbergii, 

 Van Houtte. Lvs. divided 

 nearly to the base, divi- 

 sions deeply lobed. Gt. 

 1893, p. 584. Var. column- 

 are,Carr. Habit columnar. 



(2) Var. albo- 

 variegatum, Nich- 

 ols. Lvs. with 

 large white 

 blotches. 

 Var. attreo- 

 marginatum, 

 Pax. Lvs. 

 with yellow mar- 

 gin, somewhat 

 irregularly lobed. 

 Var. rvlbrum, 

 Herd. (var. Reilen- 



92. Upright tip shoot II Mchii, Nichols.). Lvs. greenish 

 red when unfolding, turning dark 

 blood-red in late summer. Gt. lo: 

 545. B.H. 18:39. V&r.Geneva, Ellwanger & Barry, is 

 probably not much different. Var. Schwedleri, Koch. 

 Lvs. bright red when young, changing to dark green. 

 G.C. II. 15:565. Var. Stfillii, Spaeth. More upright- 

 growing: 1 vs. usually 3-lobed, with entire lobes, purple 

 when unfolding, later dark green. Gt. 42, p. 585. Var. 

 Wittmackii, Schwerin. Lvs. usually 3-lobed, with an 

 irregularly dentate and undulate yellow margin, red- 

 dish brown when unfolding, later bright green with 

 most of the tips transformed into peculiar reddish 

 brown appendages becoming, finally, dark green. Gt. 

 52:1516. Var. Drtimmondii, Drumm. Lvs. green with 

 white margin, red when unfolding. M.D. 1910:1. 



6. truncarum, Bunge. Tree, to 25 ft.: Ivs. deeply 

 5-lobed and mostly truncate at the base, 2J4-4 in. 

 across, glabrous, light green, purplish when unfolding; 

 lobes acuminate, setosely pointed, entire or sometimes 

 the middle ones 3-lobed : f r. with yellow, short and broad 

 wings, spreading at right or obtuse angles. N. China. 

 S.T.S. 1 :76. Hardy tree, with handsome, dense foliage. 



7. pictum, Thunb. Tree, 60 ft.: Ivs. 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. upright, brown or brown- 

 ish yellow, hardly twice as long as the nutlets. Man- 

 churia, Japan. S.I.F. 1:65. Handsome round-headed 

 tree, with bright green foliage, hardy. Var. parvi- 

 florum, Schneid. (A. pictum var. Mtmo, Pax. A. Mdno, 

 Maxim.). Wings of the frs. spreading: Ivs. more cor- 

 date. China. J.H.S. 29:349, 350. The form intro. as 

 A. tenellum belongs here; the true A. tenettum, Pax, is 

 not in cult. 



8. cappad6cicum, Glcd. (A. Isetum, C. A. Mey.). 

 Tree, to 50 ft.: Ivs. 5-7 -lobed, usually cordate, 3-6 in. 

 across, glabrous, light green and lustrous beneath; 

 lobes entire, acuminate: fls. greenish yellow, in upright 

 peduncled corymbs: fr. with spreading wings, the wings 

 usually 2-3 times as long as the nutlets. From the 

 Caucasus to W. China and the Himalayas. Resem- 

 bles A . platanoides, but lobes of Ivs. entire and branches 

 smooth; not quite hardy N. Var. sinicum, Rehd. 

 Smaller in every part: Ivs. 2^-4 in. across, usually 

 5-lobed, subcordate or truncate at the base: wings of 

 fr. about twice as long as nutlet. W. China. J.H.S. 

 29:358 (as A. Ixtum var. cultratum). Very similar to 

 A. pictum, but always easily distinguished by the 

 smooth greenish bark of the younger branches. Var. 

 tricaudatum, Rehd. Similar to the preceding, but Ivs. 



3-lobed. J.H.S. 29:357, 358. Var. horttcola, Rehd. 



(A. h'l-tinn var. rubrum, Schwerin; A. cdlchicum var. 

 rubrum, Hort.). Lvs. blood-red, when unfolding. Var. 

 tricolor, Rehd. (A. Ixtum var. tricolor, Schwerin). Lvs. 

 blood-red, sprinkled with rosy pink, when young. The 

 last two beautiful forms usually remain shrubby. Var. 

 aureum, Rehd. (A. Isetum aureum, Hesse). Lvs. red and 

 golden yellow. 



9. longipes, Rehd. Tree, to 30 ft.: young branches 

 with smooth greenish bark: Ivs. 3-, rarely 5-lobed, 

 or occasionally undivided and ovate, 57 in. broad, lobes 

 entire, long-acuminate, light green and soft-pubes- 

 cent beneath, purple when unfolding: corymb large and 

 loose, short-ped uncled or nearly sessile, glabrous: fr. with 

 the wings spreading at right angles. W. China. A very 

 handsome maple, easily distinguished from all allied 

 species by the large, 3-lobed Ivs., pubescent beneath. 



10. catalpifftlium, Rehd. Tree, to 60 ft.: younger 

 branches smooth, greenish: Ivs. ovate to ovate-oblong, 

 undivided, entire, sometimes with a broad rounded lobe 

 near the base, 4-8 in. long and 2-5 in. broad, rarely 

 mixed with a few 3-5-lobed Ivs., light green and gla- 

 brous beneath: corymbs sessile, large and loose, to 8 in. 

 across: wings of the fr. spreading at obtuse angles. W. 

 China. Very distinct and beautiful tree, but appar- 

 ently not hardy N. 



ly 



Section GLABRA. ^ \ 



11. glabrum,Torr. (A. 

 Doiiglasii, Hook.). Shrub 

 or small tree, 25 ft., quite 

 glabrous: petioles bright 

 red; Ivs. deeply 3-5- 

 lobed or 3-parted, .1-5 

 in. across, dark green 

 and shining 

 above, pale or 

 glaucous be- 

 neath; lobes 

 doubly serrate. 



W. N. Amer. 

 S. S. 2:89. 



c 93. Japanese Maples. 

 a. Acer palmatum var. 

 reticulatum; b, A. 

 japonicum, type; c, 

 A. palmatum var. 

 atropurpureum ; d, 

 var. ornatum; c, var. 

 Thunbergii; /, var. 

 dissectum. (XH) 



Handsome shrubby maple, 

 with graceful, shining foli- 

 age, contrasting well with 

 the red petioles and 

 branches: fr. often rose- 

 colored. Var. tripartttum, 

 Pa,x (A. tripartitum, 

 Nutt.). Lvs. small, usually 

 3-foliolate. Var. rhodocarpum, Schwerin. Frs. bright red 

 until fully ripe. 



Section PALMATA. 



12. circinatum, Pursh. Small tree, rarely 40 ft.: 

 branchlets, petioles and peduncles glabrous: Ivs. 7-9- 

 lobed, 2-7 in. across, glabrous; lobes acute, doubly ser- 

 rate: fls. in drooping corymbs, with purple sepals. W. 



