NOTE. 



The several parts of "Illustrations of North American Grasses" were originally 

 published as bulletins of the Division of Botany, and were issued as follows : 

 Vol. I, part i, October 13, 1890, as Bulletin 12, part I. 

 Vol. i, part ii, December, 1891, as Bulletin 12, part n. 

 Vol. ii, part i, October 20, 1892, as Bulletin 13, part I. 

 Vol. ii, part ii, June 1, 1893, as Bulletin 13, part n. 



