ACANTHUS 



fls. dull white 

 Europe A mol 

 tionalized ataiill 



is fatal, especiall 



sh Mo-ftly southern 



L.t, Fall planted 



stock should alwi> a be prutected tor tUi winter by long 



^' 





'■% 



13. Acanthus spinosissimus. 



14. Acanthus mollis. 



litter or evergreen boughs, even where established pla 

 are hardy. Prop, by division in spring or early r --- 

 and by seeds. Cult, by J. B. Keller. 



A. Jyvs. spiny. 



spinoslssimus, Desf. Fig. 13. Lvs. dark green, pin- 

 natelyparted; spines glistening: fls.infrequent; autumn; 

 spikes loose, pilose or glabrescent: spines of the bracts 

 recurved. 



spindsuB, Linn. Lvs. lanceolate, pinnatifld, pubescent ; 

 spines short, whitish: fls. smaller than in the last; sum- 

 mer ; spikes dense, slightly villous. B. M. 1808. Gn 

 8:li7. 



AA. 1/vs. not Spiny. 



m6Ilis, Linn. Fig. 14. Lvs. 2x1 ft., cordate, sinuately 

 pinnatifld, mostly radical: fls. summer; spikes loose, pu- 

 bescent. Gn. 52, p. 239. —Also recommended as a window 

 plant. Var.latiiaiiuB,Hort.(4.;o««ii«.s,Hort. A.Iyusi- 

 tdnicus, Hort. ) is larger and hardier. Gn. 1, p. 303. 



longiS6Uu8, Poir. Lvs. radical, longer and narrower 

 than in A. moll is, hright green: fls. June. — Though said 

 to be a stove species in Eu., it is the hardiest of all at 

 Cambridge, Mass. 



A. Oaroli-Alexdndn, Hausskn. 9-18 in. Lvs. few, radical, in 

 a laxrosette, lanceolate, spiny; spikedense. Greece.— A. cardui- 

 filiu-s. Linn.= Blepharis carduifolia.- A. ilicifblitts (Dilivaria 

 ilicifolia, Juss.). Smooth greenhouse sub-shrub with leaves re- 

 sembling Ilex aqulfolium, the Eu. Holly. Prop, by cuttings 

 under glass. E.Asia —A. monWnus. T.Anders. Lvs. pinnatifld 

 or sinuate-spinose. W. Afr. B.M. 5516. Stove species. 



AC£B (classical Latin name). Sapinddcew. Maple. 

 Trees, rarely shrubs: lvs. opposite, longpetioled, simple 

 and mostly "palmately lobed, or 3-5-foliolate, deciduous: 

 fls. small, in racemes or corymbs; petals generally 5 ; 

 stamens 4-12, mostly 8 : fr. compound of two long- 

 winged nutlets called' samaras. Asia, especially E. Asia, 

 N. Amer., Europe. Monograph by Pax in Engler's Bot. 

 Jahrb., 6: 287, and 8: 177 (1885 and 1886), suppl. in the 

 same, 16:. 393 (1893), and Hook. Ic. Plant. 19, t. 1897 



ACER 



( 1889) . The maples are among our most ornamental and 

 valuable trees for park and street planting. Nearly 

 all assume a splendid color in autumn, especially the 

 species of N. Amer. and E. Asia, which surpass by far 

 the European maples. Many of them are valuable tim- 

 ber trees, and some American species, especially A. 

 saccharum, produce sugar. For purposes of shade, 

 the common sugar maple is best and most popular. 

 The Norway maple makes a very dense and round head, 

 and is excellent for lawns, but it is too low-headed for 

 the streets. The silver maple, A. saccharinum and its 

 vars., is aiso popular where quick-growing trees are de- 

 sired. The Japanese maples are among the most strik- 

 ing and showy exotic small tribes, ami are adapted for 

 fine grounds and foi- ltmv, ii - ii i^.ts. Prop, by seeds 

 sown in autumn, or -ti ,.; i: iwn in spring. The 



early ripening specie , I . i li.nimim and A. ru- 



/»?-»m, must be sown — h iii.i i..,.iurity; the varieties 

 :iii.l r;irp species niu> be l.iuli!. a in summer on the 



'•■ 1 t.ii-ins or allied common kinds; some shrubby 



(^ A. palmatnm, also A. cissifolium and A. 

 ' ' ;ii'. rubrmn.m&y be propagated by layers or 



I'l iii'.nicl greenwood cuttings in summer. Fancy 



iiil.hs are readily winter-grafted by the veneer method, 

 III'- stocks being grown in pots. The Japanese kinds 



irv usually worked on imported stocks ot A. pulmotum. 



M'inograph of the garden forms and varieties by Graf 

 -hwerin in Gt., 1893; see, also, G.C. II. 16:75. About 



inn species. 



this coun- 



\'. : ■•i<<it''.|iMin, :in ; dasycarpum, 1; Floridanum, 5; 



Ml Li i 1 i:ii>rum, 14; grandidentatum, G; Hel- 



II. , 22; Italum, 7; Japonicum, 17; Iee- 

 , li>llum, 18; Monspessulanum, 9; Ne- 

 -■iiiiii ;l , i,i_riiui. 4; Nikoense, 29; palmatum (poly- 

 iii"]|.liiiin). Ill; IVnnsylvanicum, 27; pictum, 11; pla- 

 tanoides, l.'i; Pseudo-platanus, 19; rubrum,2; rufinerve, 

 26; saccharinum, 1; saccharum, 3; spicatiun, 25; Ta- 

 taricuiii. 2:1; Traiitvetteri, 21; truncatum, 10. 

 A, / ' •- I ■ jj^iile, mostly palmate lvs. {occasionally 



^ . J4}; fls. polygamous or vionwcious. 

 H. /. , r' • "ii.l long before the lvs. in dense lateral 



clu,'i-c: ;.. ' Iv'hed: fr. ripening in May or June. 



1. saccharinum, Linn. (A. dasycarpum, Ehrh. A. 

 eriocdrpum, Michx.). Silvek Maple. Pig. 15. Large 

 tree, 120 ft. : lvs. deeply 5-lobed to 5-cleft, 4-C in. long, 

 green above, silvery white beneath ; lobes deeply and 

 doubly serrate: fls. greenish yellow, apetalous: fr. pu- 

 bescent when young. E. N. Amer. S.S. 2:93. G.C. II. 

 1:137. Em. 556. — Ornamental tree, with wide-spread- 

 ing, slender branches, growing best in rich and moist 

 soil, but succeeds almost anywhere. Lvs. turn clear 

 yellow in fall. Many garden forms: Var. Wito, Schwer. 

 (var. Wieri laciniatum, Hort.). Branches pendulous: 

 lvs. deeply cleft, with dissected lobes. A graceful va- 

 riety. rini.nvk;il.li- for its drnopirii; branches and finely 

 divjili ,1 fi.ii.ii;... \":ir. heterophyllum, Hort. (var. Jietero- 

 plmllu,,, I, t.,, in, I, III,. Hurt. I. rprifjht: lvs. deeply cut 

 or li.l.iil. \;,r. tripartitum, Il'.rt. Upright: lvs. 3- 

 partcd. V:ir. lutescens, Hurt. I. vs. yellow, bronze-col- 

 ored when unfolding. V:u-. albo-variegitum, Hort. 

 (var. Jiihikei, Hort.). Lvs. sjii.tt. il \^ ith white or rosy 

 pink. Var. crispum, Hort. Lvs. . I.. plN .ut and crimped. 

 — Linnipus evidently suppc.s,,! tliis s|ii.ri.s to be the 

 sugar maple, and naimd it ;irri.r.li]i;.'ly. He did not 

 know the trm- siiL':ir nn.plr. 



2. ribrum. Linn. Hin .m S. .m;i,kt Maii.f. Fie. ID. 

 Large tree, iL'n ft.: lvs. ::-.'i-li.l.i-.l. :'■-! in. Ion;,', nn-en 

 above, pale or (;huiciius beneath: l,h. ihimi nl and 

 crenately serrate: fls. red or scarU-t. - -li; 

 petalsS: fr. glabrous. E. N. Amer. S.s ; I I i ."i;. 

 G.C. II. 1:173. — Very valuable tree fm m : n ., j ark 

 planting: attractive'at every season Inmi ii-~ • m ■ II. nt 

 habit, earliness of the scarlet fls., briu^lit r. .1 Iruits in 

 late spring, and the beautiful foliage, wliiih turns tiright 

 scarlet or orange in autumn. Var. Columnare, Kthd. 

 Of upright, columnar habit. Var. glohbBum, Uort. 

 Dwarf, compact; lvs. glaucous beneath: fls. bright scar- 

 let. Var. Drtimmondi, Sarg. I A . Drummondi, Hook. & 

 Arn.1. Lvs. large, mostiv 3-lobed, tomentose beneath 

 fr. bright scarlet. S. states. S.S. 2:95. Var. tomentft 



