334 XEW EXGLAXD TREES IX AVIXTER. 



71. Lateral Vmcts small, cut twig- exuding watery, resinous .iuice; fruit 



sniall. \\"hitish clrui'es; a shrub g-rt.iwiiig- in s"warnps 



Poison'^Siimneh (Rhus Vcrnix) i>..*(2S 



7-. Leaf-scars deejily V-sliaped. almost entirely surnumding' the buds 73 



72. Leaf-scars, inversely triangular Xi> heart-shaped, lari^e. not more 

 than iialf surmunding- the bud: twig-s stout: luth choci ilate-brown. 

 Ailniitliiis (Ailantfii'.s gland nlosa )p.^'24 



7 3. I'itli >"elbjwish-Virciwn : twigs stout, exuding a milky juice when 

 ent Suniaoh iRhiis) 152 



7;j. I'ith "\\"h itish : t'wigs slender, ^vithnut milk>' juice 



Vello-w AVoort r Clailrastis h'.tea) p.oSO 



74. Terminal buds on rapidly grciwn sliuuts absent, but leaving- a ter- 

 minal scar j^3 



71. Terminal Ijuds present 75 



75. Lateral buds flattened, appressed. about as broad as long- 76 



75. Lateral buds not distinctly flattened and appressed. nmstlv lung-er 

 than broad " 73 



7 6. Terminal bud larg-e, .g-enerally 12 mm. or more long:: some of the 

 lateral buds generally long-, nearly equalling teriainal bud; leaf- 



scars raised on dark red. polished ridges nf the bark 



T ^Touiitaiii Awh (Pums) p.488 



76. Terminal bud smaller, generally under ,s mm. long: all lateral 

 l.tuds small; leaf-scars not on specially colored ridges of the bark 77 



77. Tree with bushy habit of gri.>wth; twigs with characteristic licorice- 

 like taste, generally reddish-brown, nmre or less pale-woolly at 

 least toward apex; lateral buds blunt, nn.-re or less pale-woolly. ... 

 Vpple (Piirus Mains) p.4S6 



77. Tree with upright habit of growth: twigs without characteristic 

 taste, generally yellowish-green and generally smooth; lateral buds 



siiarp-puinted, smooth or S'.imetimes sli,ghtly downy 



1*0111- (Pi/niv con )n nnis) p.4S4 



7S. Buds spherical or nearly so. seldom pointed; bud-scales thick, 

 shining; leaf-scars narrow: twigs more or less zig-zag. branches 



generally thorny; fruit a small pome: small trees or shrubs 



Hawthorn (C nitdeausj ii.4J>4 



7S. Buds not spherical; bud-scales thinner 79 



79. Leaf-scars narrow crescent-shaped, several times as broad as 

 high SO 



79. Leaf-scars semicircular to l">roadl>" crescent-shaped, seldiuu as much 

 as '?y times as ijroad as high SI 



SO. Buds h-'Ug-, narrow, elliptical. Z-\ times as long as wide 



Sha<l lliisli I'Ainelanchier canadensis ii>A\)- 



50. t^uds cnnical. stout Pear iPyrits comniunis) i».4S4 



51. T\vigs densely" speckled -^"ith "\"er>' minute pale dots, brightly 

 cidorecl. geiieralU' green -^'e 11 ri-n- below and more or less reddish 

 a b rive and hig-hl\' pedished ; buds g'eneralU' densely do\vn>" at least 



ttiward apex; collateral buds usually present 



I'oat'li {Pynn)(S Pi )-sical p.512 



51. Twigs ni.it densely sv>eckled with minute dots; buds not densely 

 downy, collateral buds generally not present S2 



52. Twigs without bitter taste: branch lets generally becoming corky- 

 ridged: bud-scales downy-margined; leaf-scars large with con- 

 siiicuous btmdle-scars; fruit a spherical bur-like head generally 

 present in winter Sweet Gum I LkiiiUia)iihar Sti/iaciflna) p.4S0 



52. Twigs with bitter taste often resembling bitter almonds; branches 

 wilbout cork\' ridges; bud-scales not downy-margined ; fruit a 

 firupe flierry or Plum (Prnnus) 144 



SC. Buds spherical or nearly so; bud-srales thick, shinins-; twigs more 



or less zigzag-, often t h.-rny ; fruit a small p.. run. . . . ". T 



Hawthorn ( Cratart/ilS i'pA94 



53. Buds not spherical, longer than br.iad T 84 



si. Twigs genera] I \- gra\-- wonll>- toward ap^x; buds blunt, brown- 



hair>- at tip: stipule-scars at the sides of leaf-scar 



Qiiiiiee (Cydonia i/nlgaris p.490 



