502 Eggleston : Crataegi of Mexico and Central America 



trips in Mexico for me ; and Dr. J. N. Rose, Mr. J. N. Painter, 

 and Mr. W. R. Maxon, of the U. S. National Museum, and Mr. 



E. W. Nelson and Mr. E. A. Goldman of the U. S. Biological 

 Survey have also given me information in regard to the Mexican 

 species. In fact, without the recent work of these gentlemen in 

 Mexico our knowledge would be very limited indeed. I have 

 also had full access to the material in the Gray Herbarium, the 

 National Museum, the Missouri Botanical Garden, and the Arnold 

 Arboretum. 



The first notice we have of Crataegus in Mexico was by Dr. 



F. Hernandez who resided in Mexico from about 1570 to 1580. 

 His Nova Plantarum, Animalium et Mineralium Mexicanorum 

 Historia was published at Rome in 165 1, and his De Historia 

 Plantarum Novae Hispaniae at Madrid in 1790. 



The first definite work on the group was that of Mocino & 

 Sesse (about the City of Mexico), but this work was not given to 

 the world until De Candolle published the Pomaceae of his Pro- 

 domus in 1825. Baron von Humboldt found the rare C. pubescens 

 (H.B.K.) Steud. in Real de Moran, Hidalgo, and published it in 

 1824. It seems remarkable that he should have picked up this 

 rare and little-known species and not have observed the more 

 common C mexicana Moc. & Sesse. Around these two species 

 and that of Bonpland's C stipulosa (H.B.K.) Steud. from Ecuador, 

 there has been a storm center ever since. One will find herbarium 

 sheets about equally marked with these names, when as a matter 

 of fact most of them are C. mexicana Moc. & Sesse. 



Although the type of Crataegus mexicana Moc. & Sesse has 

 not been seen, it is easy to settle the status of the species, for it was 

 collected in the vicinity of the City of Mexico and the tracing of 

 Mocino & Sesse's drawing is extant ; this, with the fact that only 

 one species is known near the City of Mexico seems to settle the 

 status of C mexicana. C. stipulosa (H.B.K.) Steud., as to de- 

 scription, matches very well with C mexicana, but the flowering 

 material sent from Kew seems different, and until C. stipulosa is 

 well known it is better to hold to the name C. mexicana, although 

 they may prove to be one species, in which case, C. stipulosa, being 

 the older name, will replace the other. C pubescens (H.B.K.) 

 Steud. has been another stumbling-block. It was collected in 



