DESCRIBED SPECIES OF BOTRYCHIUM 55 
Mexican plants is still lamentably defective. The whole Mexican 
region will have to be gone over piecemeal, and collections made 
that will give some conceptions of the distribution of many of the 
species of that prolific country. Among them is this Mexican 
representative of our common rattlesnake fern of which scarcely 
any specimens exist in American collections. 
[The figures on page 4g illustrate four species: 7. 7, 2= 
Botrychium Onondagense ; f. 3 = Botrychium Lunaria; f. 4, 5 = 
Botrychium neglectum ; f. 6, 7 = Botrychium tenebrosum. | 
CoLUMBIA UNIVERSITY, 
25 December 1902. 
