BOTANY AT. ST. LOUIS 128 
the first summer to botanical investigations at Cambridge, and then 
visiting his native land in company with his wife and son. In 1868 
the family again visited’ Europe for a year, the son remaining to study 
at Berlin. The mother died in January, 1879, and Englemann’s own 
health failed alarmingly. A journey to Germany was taken in 1883 
and the voyage was so beneficial that he was able to resume his botanic- 
al work. Serious symptoms soon caused him to return and the ocean 
voyage again proved very restorative and he resumed his labors with 
increased vigor. Increasing infirmities, however, gradually reduced 
his working powers until his death, which took place on February 4, 
Upon first coming to this section of the country Dr. Engelmann 
traveled on horseback through southern Illinois and in Missouri and 
Arkansas; and during the latter part of his life he explored the moun- 
tains of North Carolina and Tennessee, the Lake Superior region and 
the Rocky Mountains and contiguous plains in Colorado and adjacent 
territories, thus being able to study in place, and with the acuteness of 
judgment which characterized his work, the Cacti, Conifere, and 
other groups of plants which he had investigated for years. In 1880 
he made a long journey through the Pacific states, where he saw for 
the first time growing naturally many plants which he had described 
and studied over thirty years before. 
Dr. Engelmann’s papers are voluminous even for a man who could 
devote all of his time to botany; but it must be remembered that he had 
a large practise as a physician, which took most of his time, and that 
botany was taken up only in spare moments. When this is taken into 
account, together with the fact that he was also interested in other 
sciences (especially meteorology), their extent is nothing short of mar- 
velous. The memorial volume of his papers published by Henry Shaw 
contains eighty-seven different papers of varying length. These have 
been grouped in this volume under the following headings or general 
topics: Cuscutinee, Cactee, Juncus, Yucca and Agave, Conifere, 
Oaks, Vitis, Euphorbiacez, Isoetes, Miscellaneous, Lists and Collected 
Descriptions of Plants, and General Notes. It was the custom of Dr. 
Engelmann to take any scrap of paper and make notes upon it which 
might occur to him, together with sketches showing characters of the 
plant in hand. All such notes were at his death collected and mounted 
in a set of large books which are now in the possession of the Missouri 
Botanical Garden. ‘These notes were so numerous that they made a 
library in themselves, filling sixty of these books. 
His method of working was to take a single group of plants and 
work it out systematically so far as was in his power. His treatment 
of the genus Cuscuta in his first monograph of that group increased 
the number of species from one to fourteen without going west of the 
