STAXDLEY TEEE3 AXD SHRUBS OF MEXICO. 3 



species. Later, it is to be hoped, someone else may have an oppor- 

 tunity to treat at length the herbaceous species or the flora as a whole. 

 While it is only too evident that the available collections of Mexican 

 plants are inadequate to furnish a complete illustration of the flora 

 of the country, the offering of such a -work as can be prepared with 

 the material at hand needs no apology, for it is certain that the 

 larger part of the woody plants, and especially those of economic 

 importance, have already been collected. 



It is not deemed advisable to include in the present publication an 

 account of the general features of the flora. These have already been 

 dealt with at length by other authors, particularly Hemsley^ and 

 Ramirez.^ 



PLAN OF THE WORK. 

 COLLECTIONS STUDIED. 



In this list of Mexican plants it is intended, of course, to account 

 for all the trees and shrubs which have beo-u collected in Mexico 

 or reported from that country. The account is based wholly upon 

 the collections in the United States National Herbarium, although 

 the published species not represented there have been included in 

 the keys when possible. The National Herbarium contains the 

 largest and most complete representation of Mexican plants that 

 has been assembled, a large proportion of the material having been 

 obtained by special collectors sent into the field by the United States 

 National Museum and the United States Department of Agriculture. 

 In addition, the herbarium contains many collections received from 

 other institutions and individuals, the more important of which were 

 obtained by the following collectors: F. Altamirano. F. "W, Anthony, 

 Brother G. Arsene. J. L. Berlandier, M. Botteri. M. Bourgeau. T. S. 

 Brandegee. G. N. Collins. C. Conzatti. O. F. Cook. F. V. Coville. 

 C. K. Dodge. C. B. Doyle. H. Galeotti. G. F. Gaumer. E. A. Gold- 

 man, J. M. Greenman, C. V. Hartman, A. S. Hitchcock, E. TV. D. 

 Holwav, M. E. Jones. E. Kerber. E. Langlasse. F. M. Liebmann. F. E. 

 Lloyd,' D. T. MacDougal. F. S. Maltby. E. A. Mearns. C. F. Mills- 

 paugh. Charles Mohr.' E. TV. Nelson, Brother Nicolas. C. R. Orcutt, 



^Biol. C^ntr. Amer. Bot. 4: 138-315. 1887. 



' La vegetaci6n tie Mexico, pp. 1-271, with 2 maps. Mexico, 1899. 



' Charles Mohr (1824-1901) was a^native of Germany, who came to the United 

 States in 1S4S. He visited Mexico in 1S57 and was a ^est of Sartorius at his 

 home in Mirador. He made botanical collections in the region of Orizaba. 

 Here he was associated with Botteri, and his collection numbers, in some cases 

 at least, are the same as Botteri's. His collections are in the L'nited States 

 National Herbarium. Dr. Mohr is best known for his " Plant Life of Alabama." 

 published as volume 6 of the Contributions from the United States National 

 Herbarium. 



