No. 539] ORIGIN OF SPECIES IN NATURE 



665 



of the common form. In both these respects it agrees 

 with the Albion specimens. 



From the herbarium of the New York Botanical 

 Garden, Dr. Marshall A. Howe was kind enough to 

 write: "We have in our herbarium apparently only one 

 specimen of the form that you have in mind." This 

 specimen was collected in 1865 at Uxbridge, Mass., by 

 J. W. Bobbins. Another sheet of this material is in the 

 Gray Herbarium. 



Through the courtesy of Professor William Trelease 

 we know that a laciniate-leaved variety of the burdock is 

 represented in the herbarium of the Missouri Botanical 

 Garden by two herbarium sheets, the one, without date, 

 bearing a specimen collected in Europe, the other a 

 specimen collected at New Bedford, Mass., in 1890 by 

 Harvey. Professor Trelease adds: "Neither has repre- 

 sented the extreme cutting of the leaves that yours 

 shows, but there is enough of it to lead me to think that 

 as extreme forms might have been collected." 



Dr. Greenman, of the Field Museum of Natural 

 History, fails to identify any material in this collection 

 with A. minus lacimatum, "unless possibly a very poor 

 specimen collected at Chelsea, Mass., Sept. 24, 1863, by 

 J. Blake." 



While it is probable that the same form occurs in 

 Europe, thus far it does not appear to have been 

 recorded in the floras. Inquiries on the part of my 

 friend Dr. Jongmans, of the State Herbarium at Leyden, 

 Holland, failed to elicit confirmatory answers, nor does 

 the variety appear to be represented either in the Leyden 

 herbarium nor in any of the European herbaria whose 

 curators I have been able to consult. 



It is hoped to amplify, by further inquiries, these some- 

 what meager data. From what we know at the present 

 time, it would appear that Arctium w'unts laciniatum is 

 of comparativelv rare occurrence (Fig. 7). I have never 

 met it except at Albion, though a good deal of territory 

 was covered both here and abroad and T was looking 

 for just such variations. Professor Barr, who has 



