Dr. Gray's Manual of the Botany of the Northern United States, gives all the flowers wild to the northern part of "Virginia and east of the Mississippi River. Chapman's Flora of the Southern United States completes all south of where Dr. Gray's work ends. Coulter has given a Flora of Colorado, which takes in what Gray and Chapman do not touch; but there is still the large tract occupied by Texas and contiguous regions. Young's Flora of Texas fills this gap. A. S. Barnes & Co., of New York, have recently issued a new re-print of this, which will be of great service.