IDENTIFICATION OF TREES. 199 



f^^ Buds except occasionally on rapidly grown twigs, generally not 

 stalked pointed; corky ridges generally present on branchlets; 

 stipule-scars and /J^tkin^s^absent^ • - .-^.•^— 'j,- • ■styra<kflu:aj' piio 



^fi Ruds sunken (i.e. partially or completely covered by the bark) 

 For thlmos? par{ minute Ind superposed; best seen in a section 

 leiigthwise of the twig, through the node at right angles to the 

 surface of the leaf-scar • ^' 



56. Buds not sunken and in most cases not superposed b9 



Twiffs very stout, generally 1 cm. or more thick; pith salmon- 

 coTifld; buds bronze-silky, exposed but surrounded by an incurved 

 downy rim of the bark; bundle-scars generally more than 3. •••••• 



Qowiiy Keiituckv Coflfee Tree (Gymnocladus dioxca) p.3H0 



57. Twigs "rather slender generally less than 5 mm. thick; pith whitish 

 not salmon-colored; bundle-scars 3 ^* 



58. Buds smooth, distant, the uppermost breaking through the bark 

 above the leaf-scar, the lower ones submerged, appearing in sec- 

 tion of twig as separate green dots. . . .... ... . • •••;••• •••■•• " "AoA 



.... Hoiiev Locust (Gleditsia triacanthus) p.382 



58. Buds downy.' clustered together in cavity below If^^p^S^Lv/) ' « ^ss 



Locust (Rooinia) p.3?5s 



59. Bud-scale one, large cap-like, terminal bud ^^^?fj^^;^- ;.^-,j/^y p.2.-,6 



57 



59. 

 60. 



60. 



Bud-scaleV'more' than "one or bud-scales absent; terminal bud 

 present or absent 



First or lowest scale of lateral bud directly in front (i.e. facing 

 directly out away from twig; see fig. 100); leaf-scar covered with 

 a light-corky layer, large inversely triangular; bundle-scars 3, 

 often compound; pith more or less 5-pointed star-shaped. •••••••• 



^ _ Poplar (Poimlus) 96 



First or lowest scale of "lateral bud not directly in front 61 



61 Twigs branching freely the first season, therefore branches show- 

 ing on last season's growth, the branches surpassing the main 

 Rxis in lons'th * 



61 Twigs generally" not branching the first season or if occasionally 

 branching then branches not surpassing main axis in length b3 



62. Bundle-scar one; twigs greenish, spicy, mucilaginous when chewed. 

 Sassafras (Sassafras variifoliwn) p.34^ 



62. Bundie-scars" 3, twigs not mucilaginous .• • • ^**5ye 



nate-leaved Dogwood (Cornus alternifoUa) under Comparisons p.4is 



63 Bundle-scars 1 or 2; leaf-scars, except on young shoots, mainly 

 densely clustered on short, stout, wart-like branches 64 



63. Bundle-scars 3 or more ^^ 



64. Bundle-scar single; leaf-scars minute, scattered leaf-scars also 

 present on twigs, very numerous and strongly decurrent; twigs 

 slender; fruit a cone, generally present l^arcXx (L,arix) yu 



64. Bundle-scars 2; leaf-scars larger, scattered leaf-scars if present 

 relatively far apart and not decurrent; twigs stouter; frmt a ftone- 

 fruit generally absent Ginkgo (Ginkgo hiloha) p.248 



65. Bundle-scars 3 or if more than 3 then in a single curved line 

 (bundle-scars of Bitternut p. 275 occasionally in single line) by 



65, Bundle-scars more than 3, variously grouped or scattered, but not 

 in a single line i 



66. Stipule-scars absent; terminal bud present 68 



66. Stipule-scars present; terminal bud present or absent o< 



67 2-3 bud-scales visible; bundle-scars not projecting; terminal bud 

 present or generally absent. Chestnut (Castanea dentata) p.-}>« 



67. 4 or more bud-scales visible; bundle-scars projecting; terrninai 

 bud absent Mulberry (Moi-iis) 141 



68. Buds large; twigs without resinous juice; fruit a nut; a tree. ••••. 



Hickory (Carya) 101 



68. Buds small; twigs with resinous juice; fruit a small white drupe; 

 a shrub growing in swamps. Poison Sumacli (Rhus Vernix) p.394 



