18 WOODY PLANTS 



32. Leaf-scars opposite or whorled. 33 



32. Leaf-scars alternate. 89 



33. Leaf-scars whorled. 34 



33. Leaf-scars opposite. 38 



Leaf-Scars Whorled 



34. Twigs coarse. . . Catalpa, p. 186 



34. Twigs slender. 35 



35. Buds small, often sunk in bark. . . Cephalanthus, p. 186 



35. Buds medium -sized, very evident. 36 



36. Twigs with two or four hairy lines beloweach node, . . Diervilla , p. 187 



36. Not as above. 37 



37. Soft-wooded shrubs. . . Hydrangea, p. 99 



37. Trees (Abnormal specimens) . . Acer , p. 139 



Leaf-Scars Opposite 



38. Climbing or scrambling. 39 



38. Not climbing. 42 



39. Climbing by tendrils or aerial roots. 40 



39, Twining or scrambling, without tendrils or aerial 

 roots. . . Lonicera, p. 187 



40. Climbing by tendrils. 41 



40. Climbing by aerial roots. . . Campsis, p. 185 



41. Section of stem showing wood in shape of a cross. . . Bignonia, p. 185 



41. Wood not cross-shaped in section. . . Clematis , p. 91 



42. Some twigs ending in spines. . . Rhamnus, p. 143 



42. Twigs not ending in spines. 43 



43. Bundle-traces distinct, three or more in a line. 44 



43. Bundle-traces one or many; if many, scattered or in a 

 ring or nearly confluent in a line. 76 



44. Leaf-scars large and broad. 45 



44. Leaf-scars small or narrow. 48 



45. Trees. 46 



45. Soft-wooded shrubs. 47 



46. Twigs with milky juice. . . Acer , p. 139 



46. Twigs without milky juice. . . Aes cuius, p. 143 



