LIST OF ILLUSTRATIONS XV11 



FIG. PAGB. 



200. Gelsemium Cross-section of Stem 352 



201. Gelsemium Cross-section of Root 352 



202. Gelsemium Cross-section of Rhizome 353 



203. Spigelia Cross-section of Rootlet 354 



204. Spigelia Cross-section of Rhizome 354 



205. Gentiana lutea Flowering Head and Dissected Flower 356 



206. Gentian Root and Rhizome . . . 357 



207. Gentiana lutea Cross-section 357 



208. Cross-section of Apocynum cannabinum 360 



209. Strophanthus hispidus Branch and Seed with Comose Awn 362 



210. Jalap Tuber 365 



211. Jalap Tuber Cross-section 365 



212. Convolvulus scammonia Branch 367 



213. Leaf of Yerba Santa 368 



214. Mentha piperita Flowering Branch 371 



215. Mentha viridis Flowering Branch 373 



216. Hedeoma pulegioides Flowering Branch 374 



217. Atropa belladonna Branch 379 



218. Cross-section of Belladonna Root 380 



219. Scopola Rhizome 382 



220. Datura stramonium Branch Showing Flower and Fruit 383 



221. Hyoscyamus niger Flowering Branch. 384 



222. Capsicum jastigiatumn Branch 387 



223. Digitalis purpurea Flowering Branch 390 



224. Leptandra Cross-section of Rootlet 392 



225. Leptandra Cross-section of Rhizome 392 



226. Cephcdis ipecacuanha Plant and Dried Root 395 



227. Cross-section of Ipecac Root 396 



PLATE II. MAP OF SOUTH AMERICA 399 



228. Cinchona officinalis Branch 400 



229. Cross-section of Cinchona calisaya Bark 401 



230. Cinchona calisaya Bark Cross-section of 401 



231. Cinchona succirubra Branch 403 



232. Cinchona rubra Cross-section of Bark 404 



2 33- Cross-section of Cuprea Bark 405 



234. Viburnum opulus Flowering Branch and Fruit 407 



235. Viburnum opulus Cross-section of Stem-bark 408 



236. Viburnum prunifolium Branch with Flowers 409 



237. Viburnum prunifolium Cross-section of Root-bark 410 



238. Valeriana officinalis Plant and Rhizome 411 



239. Cross-section of Valerian Rhizome 412 



240. Cross-section of Valerian Rootlet 412 



241. Colocynth Portion of Vine and Whole Fruit 414 



242. Transverse Section of Colocynth Fruit 414 



243. Longitudinal Section of Colocynth Fruit 414 



244. Citrullus colocynthis Cross-section through Outer Portion of the Fruit. 415 



245. Ecballium elaterium Branch with Flowers 417 



246. Lobelia inflata Portion of Plant and Flower 418 



247. Cross-section of Taraxacum Root 420 



248. Inulin Spherules in Taraxacum 421 



249. Laticiferous Tissue in Taraxacum Root 421 



