among the families that made up the shrubby herbaceous flora were the Malvaceae, Legum. osidae, Cucurbitaceae, Rubiaceae, Composi- tae, Asteriaceae, Convolvulaceae, Nolanaceae, Euphorbiaceae and Commelinaceae besides the grasses, sedges and ferns. In the vicinity of Orizaba, the Compositae had their greatest display. The essentially American Helianthoideae were the forms most abundant and not only are they characteristic of this particular region but have in Mexico their greatest concentration, amounting, it has been estimated to, 32% of the species and 1/5 of the genera of all the Compositae of the country. The suborder Eupatorieae ranks sec- ond in numerical strength, the genera Eupa- atorium & Stevia however contributing nearly all the species. The Asteriadeae had but little representation in the forms that are so characteristic of the north, Solidago, Aster and Erigeron. All the other sub orders of Compositae were present, extcepting the Arctotideae and Calendulaceae which are confined to Africa and the Mediterra- nean regions. Collections were made at three successively higher stations till the altitude of 9000' was reached Agerionium and the grasses of the sandy plain below. This was the highest point collections were made by the writer but several species extend their range a few hundred feet higher and Dr. J. secured an Oraba at