Key to Trees and Shrubs. I'll 



57. Leaves very broad, sharply lobed, palniately veined : bark ex- page 



foliating from young trunks and branches annually in 



plates ; branches greenish-white P/a/aiiKs. GO 



57. Leaves few-lobed, truncate at the appex with a very l)road 



shallow notch L/itodt-iidrnii. 42 



57. Leaves star-shaped with -3-7 long lobes, shining, glandular-ser- 

 rate ; the bark of branchlets usually with corky ridges. Ligicidaiiift//-. liO 

 57. Leaves not as above, entire .'iS . 

 57. Leaves not as above, denticulate or serrate (il . 

 57. Leaves not as al)ove, lobed liO . 

 58. Bark spicy-aromatic and very mucUaginous ; leaves often lobed . . Sassa/'/-as. 4it 

 58. Not spicy-aromatic; leaves thin,^pvate-lanceolate, pointed, 5-10 in. 



long, 2—1 in. wide, very smooth As/miiia. 12 



58. Not spicy-aromatic ; leaves thin, oblong, pointed, green and a little 



pubescent beneath, .5-10 in. long ' Magiio/ia. 41 



58. Not spicy-aromatic and not as above ;59 . 



59. Leaves large, round-cordate, pointed : flowers preceding the 



leaves Ccrcis. 6i) 



59. Leaves ovate, pointed, pale beneath, veiny Cormis. S9 



59. Leaves oval or obovate, commonly acuminate, 2-5 in. long Xvssa. 90 



59. Leaves thickish, ovate-oblong or elliptic, abruptly acuminate, 

 glaucous beneath, :!-5 in. long; petioles, veins and margins 



puberulent Diospyrus. 95 



59. I„eaves lanceolate-oblong, thickish, smooth and shining above, 



downy beneath ; fruit an acorn Qitcrcus. 33 



60. Bark spicy-aromatic and very- mucilaginous ; some \e3.ves entire. Sassafras. 49 

 60. Leaves broad, cordate-ovate, serrate, on young shoots mostly lobed. .Aforits. 36 

 60. Leaves cut-lobed at the apex, round-ovate or ovate-oblong; pome 

 drupe-like, containing 1-5 bony-seeded stones; large shrub 



or small tree CratcPgus. 63 



60. Leaves ovate, oblong or lanceolate, acute at base or often rather 

 cordate, cut-serrate or lobed ; pome with 2-5 papery or car- 

 tilaginous carpels ; small tree Pvriis. 62 



60. Leaves variously lobed ; fruit an acorn ; large trees Qttei-cus. 33 



61. Leaves finely serrate or denticulate 62 . 

 61. Leaves sharply, coarsely, doubly, or siuuately serrate 63 . 

 62. Leaves oblong-lanceolate, pointed, serrulate, on slender petioles ; 

 the white flowers and oblong ■5-celled pods in long, 1-sided 



racemes clustered in panicles O.irdfii droit. 92 



62. Leaves ovate to oblong or broadly elliptical, acute or pointed, very 

 sharply or finely serrate ; the flowers and the several or 10- 



seeded berry-like fruit racemose Amelaticliier. 62 



62. Leaves oblong to lanceolate, oval or obovate, finely and sharply 

 serrate, pointed ; flowers and 1-seeded fruit in clusters or 



racemose Pruniis. 68 



62. Leaves oblong or oblanceolate, finely glandular-serrate, tomentose 

 beneath or nearly smooth ; fruit berr>'-like, 2-5-celled, each 



2-seeded Aronia. 62 



62. Leaves long, linear-lanceolate or ovate-lanceolate, serrate, denticu- 

 late or sub-entire; shrubs and trees, mostly along streams. ..S"(r//.i-. 30 



