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It is a mattci- <»f fi'jjrct that no ad<M|iiat<' prcsciitalion (»|" the laiiiily 

 from the ('(•((loirjca! standpoint seems to he possible as yet. The pMi- 

 eral facts of the ^fe()trrai)hiral distrilmtion have h)n«»' heen known, and 

 need not he repeated here: hut the \vi<h' rann(> (tf conditions, the 

 jjreat \arial>ility (»f numerous forms, the in(h'linitem\ss of many of the 

 ree(»t;ni/ed jreneia, all assure us that it is a jjfroup in whieh a study of 

 the relati(»n lietween forms and conditions wouh' he very jtrolilalde. 



This work has heen hased chielly upon the collecti(»n in the National 

 llerl»ariimi, foi-merly dei)osited at the Depart mei\t of A<,n"iculture. now 

 under the care of the V. S. National Museum. Ih're are to he found 

 till the types (tf new species de.scriljed in this work, as well as the first 

 set of all the (lovernment surveys for the last fifty years. This collec- 

 tion contains ahoiit It. (too sheets of rmhelliferae, and has undoid)tedly 

 the richest representation of Nortli American rmhelliferae in the world. 



The work has heen sup|)leimMited l»y an examination of the ("oidter 

 herharium. now in the I'niversity of ('hica<,'o, which contains nearly 

 all of the types of our Kevision. Kv<'ry si)(>cimen has heen examin(>d 

 in the IMiiladelphia Academy of Science, the N(>w York Hotanical 

 (Jarden, the (J ray herltariiuu at Camhridjrc, Fi-jink Tweedy 's herharium 

 (Washin},''ton). a part of Professor (Jreene's h«'rhariinu (Catholic I'lu- 

 versity, Washinj,''ton), ii part of Mr. Thomas II. Kearney's collection 

 (rich in southern species); also i-ertain ty])es from the M. K. Jones her- 

 l)ariimi. from the California Academy of Science, ainl from the I'ni- 

 versity of California, as well as from numerous collectors. Tiie Canl)y 

 herhariinu, now in tin' Collejj^e of IMiarmticy, New York City, was 

 placed at our dis])osal hy Dr. II. II. Kuslty. The entire collection of 

 \Valt(>r Deane's hei'harium has passed through our hands, and although 

 it is contined to the ranti"e of dray's Manual it contains many interest- 

 in^r phiiits, all of which are mounted in the most perfect manner. 



Amon^ those who have assisted us should l)e mentioned the followinj^: 

 Mr. Frederick V. Coville, who greatly interested himself in the puhlica- 

 tion of this report and otl'ered many \alua]»le su<;j;estions; Prof. E. L. 

 (ireene, who placed his herharium and choice lihrary at <nir disposal 

 and gave help in knotty (jucstioiis of nomenclature; Dr. P. L. Pohin- 

 son, Dr. N. h. Pritton, and Mr. 'I'homas ]Meehan, who not oidy loaned 

 material from the great herharia which they control, hutextenih'd mativ 

 courtesies while at work in their separate institutions; Dr. W. L. ,]ep- 

 son, who loaned or sent material from his privat(> collection and from 

 the rniv(>rsity of California; Miss Alice Eastwood, who loaned speci- 

 mens of Ilydrocotvle from the California Academy of Science; Prof. 

 Harry (Tarman, who sent material fron: Kentucky, and Mr. (ieorgc 

 E. Osterhout, froiu Colorado; Me.ssrs. C. V. Piper and L, F. Hender- 

 son, who sent material from the Northwest, accompaided ])y many 

 valuable notes and suggestions; and Mr. J. AV. Hlankinship, who 

 sent material from Monttma. Mr. AY. Botting Ilemsley and ^Ir. II. 

 Harold W. Pearson have looked up types at Kew; while Mr. E. G. 

 Baker of the British Musemii has given assistance in comparing our 

 material with types in Loudon. 



