14 



ACER 



ACER 



unfolding. Var. tricolor, Hort. Lvs. dark blood-red, 

 sprinkled with rosy pink when young. These two beau- 

 tiful forms usually remain shrubby. 



13. platanoides, Linn. NORWAY MAPLE. Fig. 19. 

 Large tree, 100 ft. : Ivs. 5-lobed, cordate, 4-7 in. across, 

 glabrous; lobes pointed, remotely serrate: fls. yellowish 

 green : fr. with horizontally spreading wings. Eu., 

 Caucasus. Large, handsome tree, with round, spread- 

 ing head, resembling somewhat A. saccharum. The 

 Ivs. turn pale yellow in autumn. Many garden forms, 

 some of which are here arranged in two groups : the 

 first being chiefly remarkable for the manner in which 

 the Ivs. are cut ; the second being chiefly remarkable 

 for their coloring. 



(1) Var. cucullatum, Nichols. Lvs. irregularly and 

 shortly lobed, crimpled, light green. Var. disgectum, 

 Jacq. Similar to var. Lorbergi, but with darker foliage 

 and of slower growth. Var. globosum, Hort. Forming 

 a globose head. Var. laciniatum, Ait. Lvs. irregularly 

 divided, the divisions bending downwards : growth 

 upright. Var. Lbrbergi, Van Houtte. Lvs. divided 

 nearly to the base, divisions deeply lobed. 



(2) Var. albo-variegatum, Nichols. Lvs. with large 

 white blotches. Var. aureo-marginatum, Pax. Lvs. 

 with yellow margin, somewhat irregularly lobed. Var. 



17. Common Sugar Maple. Acer saccharum (X%). 



Reitenbachi, Nichols. Lvs. greenish red when unfold- 

 ing, turning dark blood-red in late summer. Var. 

 Scnw6dleri, Koch. Lvs. bright red when young, 

 changing to dark green. 



DDD. Lvs. 3-5-lobed or S-foliolate, doubly serrate: win- 

 ter-buds small, with 2 valvate scales. 

 14. glabrum, Torr. (A. Douglasi, 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 beneath ; 

 )bes doubly serrate. W. N. Amer. S.S. 2:89. Hand- 

 some shrubby maple, with graceful, shining foliage, 

 contrasting well with the red petioles and branches : fr. 

 often rose-colored. Var. tripartitum, Pax. (A.tripartl- 

 tum, Nutt.). Lvs. small, usually 3-foliolate. 



DDDD. Lvs. 5-11-lobed, lobes serrate: corymbs long, pe- 



duncled: winter-buds with 2 valvate scales. 

 * 15. circinatum, Pursh. Small tree, rarely 40 ft. : peti- 

 oles and peduncles glabrous ; Ivs. 7-9-lobed, 2-7 in. 

 across, glabrous : lobes acute, doubly serrate : fls. in 

 drooping corymbs, with purple sepals. W. N. Amer. 

 S.S. 2 : 87. Handsome, round-headed tree or shrub, beau- 

 tiful with its delicate light green foliage, red fls., rose- 

 colored fr., and its orange and scarlet fall coloring. 



16. palmatum, Thunb. (A. polymdrphum, S. & Z.). 

 JAPAN MAPLE. Shrub or small tree, 20 ft. : petioles and 

 peduncles glabrous ; Ivs. 5-9-lobed or divided, 2^ in. 

 across, glabrous, lobes oblong, acuminate, doubly ser- 

 rate or incised : corymbs few-flowered, erect, with small 

 purple fls. Japan. S.Z. 1:145, 146. A.F. 12: 11. -This 

 species and A. Japonicum are known as Japanese 



maples. They are extremely handsome shrubs of dense 

 though graceful habit, and with elegant foliage, beauti- 

 ful especially in spring for its delicate shades of 

 green and red, and again in autumn, when the Ivs. as- 

 sume the most striking tints. Some of the more vigor- 

 ous-growing varieties, like atropurpureum , dissectum, 

 ornatum, and the typical forms, are hardy even in New 

 England, while the most variegated forms are more ten- 

 der. They grow best in partly shaded situations and in 

 well drained, rich soil. There are many varieties, mostly 

 introduced from Japanese gardens, of which the follow- 

 ing are some of the best. They may be divided into 5 

 groups, representing various degrees of dissection of 

 the leaves : 



(1) A. palmatum, var. Thiinbergi, Pax. (A. palma- 

 tum, Thunb.). Lvs. deeply 5-9-lobed or cleft; lobes ob- 

 long-lanceolate, coarsely and doubly serrate or incised. 

 Var. atropurpureum, Van Houtte. Fig. 20, c. Lvs. dark 

 purple, coarsely doubly serrate. F.S. 12:1273. Var. 

 sanguineum, Hort., is brighter, and var. nigrum, Hort., 

 darker red than var. atropurpureum. Var. bicolor, 

 Koch. (var. atropurpureum variegatum, Hort.). Lvs. 

 dark purple, with large carmine blotches, the lobes 

 half purple and half carmine. Var. aureum, Nichols. 

 Lvs. yellow. Var. versicolor, Van Houtte. Lvs. bright 

 green, with large white spots. F.S. 14:1498. Var. 

 rdseo-marginatum, Van Houtte. 

 Lvs. small, deeply cut, with nar- 

 row pink margin. Var. crispum, 

 Andre". Fig. 20, e. Lvs. small, with 

 involute margins; of distinctly up- 

 right growth. I.H. 13: 43. 



(2) Var. sept6mlobum, Koch 

 (A. septe'mlobum, Thunb.). Lvs. 

 mostly 7-lobed ; lobes broad, equal- 

 ly doubly serrate. Var. rubrum, 

 Schwer. Lvs. large, deep red when 

 young, becoming almost green later. 

 Var. reticulatum, Andre". Fig. 20, 

 a. Lvs. greenish yellow, with green 

 margin and dark green veins. I.H. 

 13:18. Var. tricolor, Hort. Lvs. 

 with red, pink and white spots. 



(3) Var. linearilobum, S. & Z. 

 (var. scolopendrifolium, Hort.). 

 Lvs. divided nearly to the base ; 

 lobes linear, remotely serrate or 

 nearly entire. Var. atrolineare, 

 Schwer. (var. linearilobum atro- 

 purpureum, Nichols., var. pinnati- 



fblium atropurpureum, Hort.). Lvs. dark red. 



(4) Var. dissdctum, Koch (A. polymdrphum, var. 

 decomp6situm, S. & Z. ) . Fig. 20, f. Lvs. divided to the 

 base in 5-9 pinnatifid lobes. S.Z. 1:146. Var. ornatum, 

 Carr. ( v&r.disse'ctum atropurpureum, Hort. ) . Fig. 20. d. 

 Lvs. deeply cut, deep red. Var. Frederici-Guil61mi, 

 Carr. (var. pinnatifidum roseo-pictum, Lem.). Lvs. 

 finely cut, green, with white and pink spots. I.H. 

 14:523. R.H. 1867:391. 



(5) Var. sessilifdlium, Maxim. Lvs. deeply cut, with 

 very short petioles. G.C. II. 16. Of little decorative 

 value. 



17. Jap6nicum, Thunb. Fig. 20, b. Small tree or shrub : 

 petioles and peduncles downy when young ; Ivs. 7-11- 

 lobed, cordate, 3-6 in. across, light green, with silky hairs 

 when unfolding; lobes ovate, doubly serrate : fls. large, 

 purple. Japan. S.Z. 1:144. Var. macrophyllum, Van 

 Houtte. Lvs. large, light green. Var. aureum, Hort. Lvs. 

 yellow. Var. Personal, Veitch. (var. filicifblium, Hort.). 

 Lvs. large, divided nearly to the base in 9-11 pinnatisect 

 segments. 



ccc. Fls. in elongated, distinctly peduncled racemes or 



panicles. 

 D. Lvs. distinctly 5-lobed, large. 



18. macrophy Hum, Pursh. LARGE-LEAVED MAPLE. Tree, 

 100 feet high: Ivs. cordate, deeply 3-5-lobed or cleft, pu- 

 bescent when young, pale green beneath, 8-12 in. across', 

 middle lobe mostly 3-lobed : racemes pendulous : fr. with 

 yellow, bristly hairs, largely winged. W. N. Amer. S.S. 

 2: 86, 87. Handsome round-headed tree, remarkable for 

 its large foliage ; not hardy in the North. 



