16 



ACER 



ACER 



long, upright racemes, with petals. Japan. Handsome, 

 round-headed tree, with slender, spreading branches and 

 graceful bright green foliage, turning orange-yellow and 

 scarlet in autumn; hardy. 



31. Negundo, Linn. (Negundo fraxini folium, Nutt. N. 

 aceroldes, Monch.). ASH-LEAVED MAPLE. Box ELDER. 

 Large tree, 70 ft. : Ivs. 

 pinnate ; leaflets 3-5, 

 ovate or oblong-lanceo- 

 late, coarsely serrate or 

 3-lobed, mostly gla- 

 brous, 2-5 in. long: fls. 

 before the Ivs. ; stami- 

 nate fls. in pendulous 

 corymbs, pistillate fls. 

 in pendulous racemes. 

 E. N. Amer. S. S. 2: 

 96. Michx. Hist. Aro, 



23. Japanese Maples. 



a. Acer palmatum var. re- 

 ticulatum; b. A. Japoni- 

 cum, type; c. A. palma- 

 tum var.atropurpureum; 

 d. var. ornatum; e. var. 

 Thunbergi ; f. var. dis- 

 sectum. 



2:18. Large, rapid-growing tree of spreading habit, 

 thriving best in moist and rich soil. Much prized in the 

 W., where it withstands cold and dryness. Largely used 

 for shelter belts and for planting timber-claims. See 

 picture, under Box Elder. Var. Calif 6rnicum, Sarg. (A. 

 Calif6rnicum, Dietr. Negundo Califdrnicum, Torr. & 

 Gray). Branches pubescent when young : leaflets 3, 

 densely pubescent beneath. W. N. Amer. S. 8.2:97. 

 Nutt. N. Am. Sylv. 2:72. Var. violaceum, Arb. Muse. 

 ( A . Ca lifdrnicum, Hort. ) . A vigorously growing form ; 

 branches purplish with glaucous bloom or finely pubes- 

 cent when young. Var. argenteo-variegatum, Hort. Lvs. 

 with broad white margin. Probably the most effective 

 of all variegated hardy trees. F.S. 17:1781. Var. aureo- 

 maculatum, Hort. Lvs. spotted with yellow. Var. aureo- 

 marginatum, Hort. Lvs. with yellow margin. Var. 

 auratum, Spath. Lvs. yellow. Var. crispum, G. Don. 

 Leaflets curled. These horticultural varieties may be 

 grafted on common Box Elder seedlings. Box Elder 

 also grows from hardwood cuttings, like the grape. 



A. acumindtum, Wall. (A. caudatum, Wall. A. laevigatum, 

 Hort., not Wall.). Tree : Ivs. 5-lobed, deeply doubly serrate. 

 Himalayas. G.C. II. 15:364. A. argutum, Max. Small tree: 

 Ivs. small, 5-7-lobed, doubly serrate, nearly glabrous. Japan. 

 G.C. II. 15: 725. Hardy and graceful species. A. A ustrlacum, 

 Tratt.=A. campestre, var. Austriacum. A. barbdtum, Michx. = 

 A. saccharum. A. barbinerve, Max. Allied to A. argutum. Lvs. 



3-5-lobed, pubescent when young. Japan. A. Bascii, Spach, 

 Probably hybrid, A. MonspessulanumXiataricum. A. Cah- 

 fornicum, Dietr.=A. Negundo, var. Californicum. A. Califor* 

 nicum, Hort.=A. Negundo, var. violaceum. A. capillipes. Max. 

 Allied to A. rufinerve. Lvs. 3-lobed, glabrous. Japan. A. cau- 

 datum, Wall.=A. acuminatum. A. cinerascens, Boiss. Shrub 

 or small tree : Ivs. 3-lobed, %~2 in. long. Similar to A. Mon- 

 spessulanum. Persia. A. coridceum, Tsch. (A. Creticum, 

 Tratt. A. polymorphum, Spach.). Probably A. CreticumX 

 Pseudo-platanus. A. cratcegi folium, S.& Z. Tree: Ivs. oblong- 

 ovate, often slightly 2-lobed at the base, inequally serrate, gla- 

 brous. Japan. S.Z. 1: 117. Hardy. A. Creticum, Linn.=A. 

 orientale. A. Cretic um, Tratt. =A.coriaceum, Tsch. A.diaboli- 

 cum, Blume. Tree, 30 ft.: Ivs. 5-lobed, 3- G in. across, coarsely 

 dentate, green beneath and pubescent when young: fls. greenish. 

 Japan. G.C. II. 15: 533. A. Diecki, Pax. Probably A. LobeliX 

 platanoides. A. dissectum, Thuiib.=A. palmatum, var. dissec- 

 tum. A. distylum, S. & Z. Tree: Ivs. ovate, 5-7 in. long, 

 coarsely crenate-serrate, glabrous. Japan. G.C. II. 15: 499. A. 

 Douglasi, Hook.=A. glabrum. A. Drummondi, Hook.=A. 

 rubrum, var. Drummondi. A. Duretti, Pax. Probably A. 

 MonspessulanumXPseudo-platanus. A. eriocdrpum, Michx.= 

 A. dasycarpum. A. glaucum, Marsh. =A. dasycarpum. A. 

 heterophyllum, Willd.=A. orientale. A. Hobkeri, Miq. Tree, 

 60 ft. : Ivs. cordate-oblong, serrate, 4-6 in. long. Himalayas, 

 China. A. Hyrcanum, F. & M.=A. Italum, var. Hyrcanum. 

 A. hybridum, Spach. Probably A. Italum X Pseudo-platanus. 

 A. hybridum, Baudr.=A. Boscii. A. Ibericum, Bieb.=A. 

 Monspessulanum, var. Ibericum. A. Icevigdtum, Wall. Small 

 tree: Ivs. oblong, nearly entire, attenuate at the base, green be- 

 neath. Himalayas. A. Icevigatum, Hort.=A. acuminatum. 

 A. laurifblium, Don.=A. oblongum. A. leucoderme, Small. (A. 

 Floridanum, var. acuminatum, Trel.). Allied to A. saccharum. 

 Small bushy <tree with white bark: Ivs. mostly 3-lobed, 3-4 in. 

 across, greenish and finely pubescent beneath; lobes acuminate, 

 nearly entire: corymbs glabrous. N. C.,Ala. A. Lobeli, Ten. 

 Allied to A. Isetum. Branches glaucous : Ivs. rounded at the 

 base; lobes mostly undulated, abruptly pointed. Italy. A. 

 Mexicdnum, Pax, not Gray.=A. serratum. A. micrdnthum, 

 S. & Z. Shrub or small tree: Ivs. 5-7-lobed; lobes incised and 

 doubly serrate, glabrous: fls. and fr. small. S.Z. 1:141. A. 

 Miydbei, Max. Tree, 40ft.: branches corky: Ivs. 3-5-lobed, pu- 

 bescent and pale green beneath, 4-6 in. long ; lobes slightly 

 lobed. Japan. G.F. 3: 143. A. montdnum, Ait.=A. spicatum. 

 A.Neapolitdnum, Ten.=A. obtusatum. A. neglectum, Lange. 

 Probably A. campestreX Lobeli. A. oblongum, Wall. Tree, 50 

 ft.: Ivs. ovate-lanceolate, entire, quite glabrous, glaucous be- 

 neath, coriaceous. Himalayas. A. obtusatum, Waldst. & Kit. 

 Allied to A. Italum. Small tree : Ivs. tomentose beneath ; lobes 

 short, rounded: peduncles hairy. S. Eu.,N. Afr. A. Opalus. 

 Ait.=A. Italum. A. opulifblium, Vill. A. Italum. A. orien- 

 tale, Linn. (A. Creticum, Linn. A. sempervirens, Linn. A. 

 heterophyllum, Willd.). Shrub, 4 ft.: Ivs. nearly evergreen, 

 orbicular or oval, entire or 3-lobed, %-!% in. long, glabrous. 

 Orient. A. palmifolium, Borkh. =A. saccharum. A. pectind- 

 tum, Wall. Tree : Ivs. 3-lobed, coarsely serrate, the middle 

 lobe elongated, acuminate. Himalayas. G.C. II. 15:365. A. 

 polymorphum, S. & Z.=A. palmatum. A. poly rnorp hum, Sp&ch 

 =A. coriaceum. A.purpurdscens, Franch. Very similar to A. 

 diabolicum. Fls. purple. Japan. A. Rugeli, Pax = A. saccha- 

 rum, var. Rugeli. A. saccharinum, Linn.=A. dasycarpum. A. 

 saccharinum, Wangh.=A. saccharum. A. saccharinum, var. ni- 

 grum, Torr. & Gray=A. nigrum. A. saccharum, var. col- 

 umndre, Temple.=A. nigrum var. monumentale. A. sdccna- 

 rum, var. nigrum, Britt.=A. nigrum. A. Schwerlni, Pax. 

 Tree: Ivs. cordate-oblong, slightly 3-lobed or entire, glaucous 

 beneath, 5-7 in. long. Himalayas. A. Semenovi, Regel.=A. 

 Ginnala, var. Semenovi. A. sempervirens, Linn.=A. orientale. 

 A. septemlobum, Thunb.=A. palmatum, var. septemlobum. 

 A.serrdtum, Pax (A. Mexicanum, Pax, not A. Gray). Allied 

 to A. Negundo. Leaflets 3, pubescent, equally serrate. Mex. 

 A. Sieboldianum, Miq. Allied to A. Japonicum. Lvs. 9-11- 

 lobed, serrate : fls. small, yellowish. Japan. A. Sikkimense, 

 Miq. Tree : Ivs. cordate-ovate, entire or serrate, quite gla- 

 brous, coriaceous. Himalayas. A. stridtum, Dur.=A. Penn- 

 sylvanicum. A. Tatdricum, var. Ginndla, Hort.=A. Ginnala. 

 A. Tatdricum, var. lacinidtum, Regel.=A. Ginnala. A. Tauri- 

 cum, Hort.=A. Italum, var. Hyrcanum or A. campestre, var. 

 Tauricum. A. tegmentbsum, Max. Allied to A. Pennsylvani- 

 cum. Lvs. 3-4 in. long, glabrous beneath ; lobes short : fls. 

 small. Manchuria. G.C. II. 15: 75. A. trifidum, Hook. & Arn. 

 Small tree: Ivs. cuneate-obovate, 3-lobed, small, glabrous; lobes 

 entire. China, Japan. S.Z. 2:143. A. trilobdtum, Lam.=A. 

 Monspessulanum. A. trilobdtum, Hort.=A. Italum, var. 

 Hyrcanum. A. tripartltum, Nutt.=A. glabrum, var. triparti- 

 tum. A. Tschonoskii, Max. Small tree: Ivs. 5-7-lobed, cordate, 

 2-3^in. long, glabrous; lobes incised-serrate. Japan. Graceful, 

 hardy, shrubby tree. A. Ukurunduense, F. & M. (A. spicatum, 

 var. Ukurunduense, Max.). Allied to A. spicatum. Small tree: 

 Ivs. 5-7-lobed, pubescent beneath, 4-5 in. long; lobes elongated, 

 deeply serrate. Manchuria, Japan. G.C. II. 15: 172. A. Van 

 Volxemi, Mast.=A. iiisigne, var. Van Volxemi. A. velutinum. 

 Boiss.=A. insigne, var. velutinum. A. velutinum,'Rort.=A.. 

 Trautvetteri. A. villbsum, Wall. Tall tree: Ivs. 5-lobed, cor- 

 date, 6-8 in. across, tomentose below, coarsely serrate. Hima- 

 layas. A. Virginidnum, Mill. =A. dasycarpum. A. Zoeschense, 

 Pax.=A. ueglectum, Lange. ALFRED REHDEK. 



