ACER 



ACER 



199 



02. Upright tip shoot 

 of Norway maple. — 

 Acer platanoides. 



Jacq. Similar to var. LorfcfrjM, 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 clow nw ard : growth uijright. Gt. 

 42, p. 584. Var. Lorbergii, 

 , ^ - \ an Houtte. Lvs. divided 

 'i'''^y nearly to the base, divi- 

 M^ sions deeply lobod. Gt. 

 Aljljv 1893, p. 584." Var. column- 

 T^ 4re,Carr. Habit cokunnar. 



(2) Var. albo- 

 ) *- \ variegatum, Nich- 

 y ols. Lvs. with 



X, large white 

 Jy" blotches. 

 Var. a&reo- 

 marginatum, 

 Pax. Lvs. 

 with yellow mar- 

 gin, somewhat 

 ^3^ irregularly lobed. 

 <t^~-^ Var. r vi b r u m , 

 Herd. (var. Reiten- 

 Idchii, Nichols.). Lvs. greenish 

 II red when unfolding, turning dark 

 blood-red in late summer. Gt. 16: 

 545. B.H. 18:39. Var. Genera, EUwanger & Barry, is 

 probably not much different. Var. Schwedleri, Koch. 

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

 G.C.n. 15:565. Var." StoUu, Spaeth. More upright- 

 growing: lvs. 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 j-cllow 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. Drummondii, Drumm. Lvs. green with 

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



6. truncatum, Bunge. Tree, to 25 ft.: lvs. deeply 

 5-lobed and mostlj- truncate at the base, 2J-2-4 in. 

 across, glabrous, light green, purplish when unfolding; 

 lobes acuminate, setosely pointed, entire or sometimes 

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

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

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



7. 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; 

 fls. yellow: wings of the fr. upright, brown or brown- 

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

 churia, Japan. S.LF. 1:65. — Handsome round-headed 

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

 fl6rum, Schneid. (A. pictum var. Mdno, Pax. A. Mono, 

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

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

 .4. lenellum belongs here; the true A. tenellum, Pax, is 

 not in cult. 



8. cappadocicum, Gled. (A. Ixium, C. A. Mey.). 

 Tree, to .50 ft.: lvs. 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 

 Cauciisus to W. China and the Himalayas. — Resem- 

 bles .4. platanoides, but lobes of lvs. entire and branches 

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

 Smaller in every part: lvs. 2J/^-4 in. across, usually 

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

 fr. about twice as long as nutlet. W. C'hina. .J. H.S. 

 29:3.58 (as .4. Isetuin var. ruttralum). — 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 lvs. 



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

 (A. Iktum var. riibrum, Schwerin; A. cdlchicum var. 

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

 tricolor, Rehd. (,4. l^lum var. tricolor, Schwerin). Lvs. 

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

 last two beautiful forms usually remain shrubby. Var. 

 a&reum, Rehd. {A. Ixtum aiireum, Hesse). Lvs. red and 

 golden yellow. 



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

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

 or occasionally undivided and ovate, 5-7 in. broad, lobes 

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

 cent beneath, purple when unfolding: corymb large and 

 loose, short-peduncled 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 lvs., pubescent beneath. 



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

 branches smooth, greenish: lvs. 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 lvs., hght 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. 



Section Glabra. 



11. glabrum.Torr. (.4. 



Douglasii, Hook.). Shrub 

 or small tree, 25 ft., quite 

 glabrous : petioles bright 

 red; lvs. deeply 3-5- 

 lobcd or 3-parted, 1-5 

 in. across, dark grecii ^-Y-i^it^f^^n^ 

 and shining } W^.' 



above, pale or ""'^af^. ;M ''- \ 



glaucous be- 

 neath; lobes 1 

 doubly serrate. 

 W. N. Amer. 

 S. S. 2:89.— 



93. Japanese Maples. 



n. Acer palmatum var. 

 reticulatum; b, A. 

 japonicum, type; c, 

 A. palmatum var. 

 atropurpureum ; d, 

 var. ornatum; e, var. 

 Thunbergii; /, var. 

 disKPCtum, ( X X'i) 



Handsome shrubby maple, 

 with graceful, shining foh- 

 age, contrasting well with 

 the red petioles and 

 branches: fr. often rose- 

 colored. Var. tripartitum, 

 Pax (A. tripartitum, 

 Nutt.). Lvs. small, usually 

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

 until fully ripe. 



Section Palmata. 

 12. circinatutn, Pursh. Small tree, rarely 40__ft.: 

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

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

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



