176. 
Lif; 
178. 
179. 
180. 
181. 
182. 
183. 
184. 
185. 
186. 
187. 
188. 
189. 
KerysS—LEAVES ALTERNATE xxiii 
Only the stipules pungent. 177. 
Pungent leaves also present. See 146. 
Pungent twigs also present. See 181. 
Prickles also present. See 186. 
Leaf-scars on a finally torn membrane. p. 157. Robinia. 
Leaf-scars small, not on an articular membrane. 178. 
Bundle-trace one. 179. 
Bundle-traces 3: fruit a screw-like pod. p.135. Prosopis. 
Slender branchlets from the nodes: fruit fleshy. 
- p. 212. Zizyphus. 
Without this combination of characters. 180. 
Leaf-scars low: fruit umbrella-shaped. p. 213. Paliurus. 
Leaf-scars raised: fruit a legume. p. 133. Acacia. 
Wood appearing “endogenous”: a supra-axillary 
spine present. p. 46. Bougainvillea. 
Wood distinctly in a zone between pith and bark. 182. 
Pith chambered or excavated. _ p. 131. Prinsepia. 
Pith spongy: spine by side of bud. p. 235. Lycium. 
Pith continuous. 183. 
Aromatic: evergreen or with green twigs. 184. 
Not aromatic: evergreen: leaves simple. p. 99. Pyracantha. 
Neither aromatic nor evergreen nor green-twigged. 186. 
Deciduous: spines strong. p. 169. Poncirus. 
Evergreen: leaves compound. 185. 
Leaflets 3: spines needle-like. p. 167. Triphasia. 
Leaflet 1, but disarticulating from its stalk. p. 168. Citrus. 
Sap more or less milky. 187. 
Sap not milky. 188. 
Without stipule-scars: bundle-traces 3.  p. 302. Bumelia. 
With stipule-scars: bundle-traces more. p. 35. Maclura. 
Leaf-scars on finally torn membranes. 189. 
Without such articular membranes. 190. 
Spines branched, often clustered. p. 139. Gleditsia. 
Spines unbranched. p. 143. Sophora. 
