STORKS AGRICULTURAL EXPERIMENT STATION. 333 



56. Buds sunken, partially or completely covered by the bark, for the 

 most part minute and superposed; best seen in a section length- 

 wise of the twig 1 , through the node at right angles to the surface 

 of the leaf-scar 57 



56. Buds not sunken and generally not superposed 59 



57. Twigs very stout, g-enerally 1 cm. or more thick; pith salmon- 

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



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



Kentucky Coffee Tree (Gymnocladus dioica)p.514 



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

 not salmon-colored; bundle-scars 3 58 



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 



Honey Locust (Gleditsia triacanthus)v.516 



58. Buds downy, clustered together in cavity below leaf-scar 



Locust (Robinia) p.522 



59. Bud-scale one, large cap-like, terminal bud absent 



Willow (Salix) p.384 



59. Bud-scales more than one or bud-scales absent; terminal bud 

 present or absent 60 



60. First scale of lateral bud directly in front (i.e. facing directly out 

 away from twig); 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 (Populus) 96 



60. First scale of lateral bud not directly in front 61 



61. Twigs branching freely the first season, the branches surpassing 

 the main axis in length 62 



61. Twigs generally not branching the first season or if branching then 

 branches not surpassing main axis in length 63 



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

 Sassafras (Sassafras variifolium) p.476 



62. Bundle-scars 3, twigs not mucilaginous Alter- 

 nate-leaved Dog-wood (Cornus alternifolia) under Comparisons p.552 



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 65 



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 Larch (Larix) 90 



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

 relatively far apart and not decurrent; twigs stouter; fruit a stone- 

 fruit generally absent Ginkgo (Ginkgo triloba) p.382 



65. Bundle-scars 3 or more in a single curved line 69 



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

 in a single line 66 



66. Stipule-scars absent; terminal bud present 68 



66. Stipule-scars present; terminal bud present or absent 67 



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

 present or generally absent. Chestnut (Castanea dentata) p.430 



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

 bud absent Mulberry (Morus) 140 



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 Sumach (Rhus Vernix) p.528 



69. Bundle-scars 3 74 



69. Bundle-scars 4 or more 70 



70. Terminal bud absent, but leaving a terminal scar on twig 72 



70. Terminal bud present 71 



71. Lateral buds mostly large, twig without resinous juice; fruit red, 

 berry-like; a small tree Mountain Ash (Pyrus)pASS 



