COULTER AND ROSE—NORTH AMERICAN UMBELLIFERAE. 19 
It is a matter of regret that no adequate presentation of the family 
from the ecological standpoint seems to be possible as yet. The gen- 
eral facts of the geographical distribution have long been known, and 
need not be repeated here; but the wide range of conditions, the 
great variability of numerous forms, the indefiniteness of many of the 
recognized genera, all assure us that it is a group in which a study of 
the relation between forms and conditions would be very profitable. 
This work has been based chiefly upon the collection in the National 
Herbarium, formerly deposited at the Department of Agriculture, now 
under the care of the U. S. National Museum. Here are to be found 
all the types of new species described in this work, as well as the first 
set of all the Government surveys for the last fifty years. This collec- 
tion contains about 9,000 sheets of Umbelliferae, and has undoubtedly 
the richest representation of North American Umbelliferae in the world. 
The work has been supplemented by an examination of the Coulter 
herbarium, now in the University of Chicago, which contains nearly 
all of the types of our Revision. Every specimen has been examined 
in the Philadelphia Academy of Science, the New York Botanical 
Garden, the Gray herbarium at Cambridge, Frank Tweedy’s herbarium 
(Washington), a part of Professor Greene’s herbarium (Catholic Uni- 
versity, Washington), a part of Mr. Thomas H. Kearney’s collection 
(rich in southern species); also certain types from the M. E. Jones her- 
barium, from the California Academy of Science, and from the Uni- 
versity of California, as well as from numerous collectors. The Canby 
herbarium, now in the College of Pharmacy, New York City, was 
placed at our disposal by Dr. H. H. Rusby. The entire collection of 
Walter Deane’s herbarium has passed through our hands, and although 
it is confined to the range of Gray’s Manual it contains many interest- 
ing plants, all of which are mounted in the most perfect. manner. 
Among those who have assisted us should be mentioned the following: 
Mr. Frederick V. Coville, who greatly interested himself in the publica- 
tion of this report and offered many valuable suggestions; Prof. E. L. 
Greene, who placed his herbarium and choice library at our disposal 
and gave help in knotty questions of nomenclature; Dr. B. L. Robin- 
son, Dr. N. L. Britton, and Mr. Thomas Meehan, who not only loaned 
material from the great herbaria which they control, but extended many 
courtesies while at work in their separate institutions; Dr. W. L. Jep- 
son, who loaned or sent material from his private collection and from 
the Univer sity of California; Miss Alice Eastwood, who loaned speci- 
mens of Hydrocotyle from the California Acs rademy of Science; Prof. 
Harry Garman, who sent material from. Kentucky, and Mr. Ge orge 
E. Osterhout, from Colorado; Messrs. C. V. Piper and L. F. Hender- 
son, who sent material from the Northwest, accompanied by many 
valuable notes and suggestions; and Mr. J. W. Blankinship, who 
sent material from Montana. Mr. W. Botting Hemsley and Mr. H. 
Harold W. Pearson have looked up types at Kew; while Mr. E. G. 
Baker of the British Museum has given assistance in comparing our 
material with types in London. 
