SHRUBS 



xxxi 



164. 

 165. 

 166. 



167. 

 168. 

 169. 

 170. 

 171. 

 172. 

 173. 

 174. 

 175. 

 176. 

 177. 

 178. 

 179. 



Bristly or with sticky glands. 

 Neither bristly nor viscid. 165. 

 CAUTION. Sap milky. 166. 

 Sap not milky. 167. 

 POISONOUS. Rachis not winged. 



p. 74. Robinia. 



(Poison sumach), 

 p. 84. Rhus. 

 p. 84. Rhus. 



Rachis winged between the leaflets. 



Leaves with a terminal leaflet. 168. 



Leaves without a terminal leaflet. 



Leaflets narrow, silky: plant dwarf. 



Leaflets short and broad. 169. 



Leaflets sessile, under 1 cm. long. 



Leaflets stalked, one-half longer. 



Leaves with glands on larger teeth. 



Without nectar-glands. 171. 



Sap milky. 



Sap not milky. 172. 



Leaf-scars narrow, half-encircling the twig. 173. 



Leaf -scars broad. 174. 



Buds small: plant bushy. 



Buds large: plant tree-like. 



Buds large: soft-wooded: fruit small. 



Buds small: wood harder. 



Dwarf: leaflets minute. p. 



Larger in every way. 176. 



p. 76. Caragana. 

 p. 64. Potentilla. 



p. 77. Calophaca. 

 p. 75. Colutea. 

 p. 80. Ailanthus. 



p. 84. Rhus. 



p. 66. Rosa, 

 p. 57. Sorbus. 

 p. 53. Sorbaria. 

 p. 95. Xanthoceras. 

 56; Chaniaebatiaria. 



Sap milky. 



Sap not milky. 177. 



Stem stout: buds large. 

 Stem and buds moderate. 



p. 84. Rhus. 



p. 36. Paeonia. 



178. 



p. 37. Zanthoriza. 



Leaf-scar nearly encircling twig. 

 Leaf-scars shorter. 179. 



Twigs slender, often with tendrils. p. 99. Ampelopsis. 

 Twigs stouter: leaflets rather small, p. 69. Gleditsia. 



