16 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 13 



In the following paragraph I have noted the distribution of each 

 species generally, drawing upon my notes and travels, upon notes and 

 records furnished me by Dr. Forrest Shreve of the recent Carnegie 

 Desert Laboratory, upon manuscript copy of the "Flora of the Sonoran 

 Desert" under preparation by Dr. Ira Wiggins of Stanford University 

 and which he was generous enough to loan, upon information furnished 

 by Dr. Dawson of the Allan Hancock Foundation regarding cactus dis- 

 tributions, and upon information in publications. The type locality is 

 given if it is known or specific enough to mean anything. Some taxonomic 

 notes on the species or specimen at hand are also offered and in this I 

 have often tried to clarify some of the important characters for specific 

 recognition. The list, however, makes no attempt to be a descriptive 

 flora. I have tried to add to, rather than merely duplicate, information 

 already carried in earlier publications. 



The abbreviations used are those that are well established in taxo- 

 nomic literature with but two exceptions. The first is C.N.H. for Con- 

 tributions from the United States National Herbarium, rather than 

 Contr. U. S. Nat. Herb., as has been frequently used. In employing this 

 abbreviation I have followed Riley of the Royal Botanic Gardens at 

 Kew (cf. Flora of Sinalao, Kew Bull. 1923-1924). 



Proposed here is the abbreviation Brge. for Townsend Seth Brande- 

 gee, who did so much pioneer work on the Flora of Baja California, and 

 K. Brge. for Katherine Brandegee, his coworker and wife. T. S. Brande- 

 gee has been abbreviated in various ways, viz., T. S. Brandeg., Brandg., 

 and Brand. The first is too long to function as an efficient abbreviation, 

 two digits only having been stricken out, one of which is replaced by the 

 period, leaving a net gain of only one digit. The third is easily confused 

 with Brand. According to the recommendations in article 49 of the In- 

 ternational Rules of Nomenclature, Brandegee should be contracted to 

 Brande. However, as an abbreviation this is ineffective since it has elimi- 

 nated only two digits of a long name. Since none of the above abbrevia- 

 tions are short enough to carry the functional advantage of brevity, Brge. 

 stands for T. S. Brandegee in the following pages. 



Trinomials have been briefed to the citation of the varietal author, 

 or authors, only, and are not designated as to subspecies, variety, or form. 

 With very few exceptions the authors have regarded them as varieties. 

 The criteria used to differentiate subspecific entities is quite variably 

 subjective, and particularly meaningless in dealing generally with a wild 

 and incompletely known flora. Subspecific entities can be used effectively 



