118 Trans. Acad. Sct. of St. Lows. 
On coming to the Mississippi Valley, Dr. Engelmann 
found himself surrounded by plants, most of which were 
unknown to him. He studied them systematically in their 
relations to each other, devoting himself to a particular 
genus or group of plants until he had thoroughly mas- 
tered it. Among his many investigations of plants was 
that of the Cactus family, upon which his work was most 
extensive and important. His treatise on this family is 
still quoted as the highest authority. This stupendous 
task was begun in his sketch of the botany of the expedi- 
tion of Dr. Wislizenus to northern Mexico and was con- 
cluded with two illustrated memoirs, one contributed to 
the fourth volume of the Pacific Railroad Expedition Re- 
ports, and the other to Emory’s Report on the Mexican 
Boundary Survey. His splendid work on the two pe- 
culiarly American groups of plants, the Yucea and 
Agave, was published in the third volume of the Trans- 
actions of the Academy of Science. His various papers 
on the American oaks and ‘conifers, published in the 
Transactions of the Academy and elsewhere, are of the 
highest interest to science. Nearly all that we know 
scientifically of our species and forms of grapes is di- 
rectly due to Dr. Englemann’s investigations. Much of 
his work on the grape vines of Missouri was published 
by the Academy of Science. 
In the year following his death the principal professor- 
ship in the Henry Shaw School of Botany, which was 
then established, was named after him. His friend and 
co-worker, Dr. C. C. Parry, named for him a peak in the 
Rocky Mountains and also the picturesque cafion through 
which now passes the cog wheel railroad from Manitou 
to the summit of Pike’s Peak. The name Engelmann has 
become unalterably associated with the Buffalo grass of 
the plains, with the noblest Conifers of the Rocky Moun- 
tains, and with the most stately Cactus in the world, ver- 
ifying the prediction of his biographer that ‘‘the Western 
plains will still be bright with the yellow rays of Engel- 
mannia, and that splendid Spruce, the fairest of them all, 
