Hegelmaier Oct. 10,186? _ 2 _ 



It will be the more interesting for you to see these Origi- 

 nals. Ortly, I do not entirely agree with you, when you write. that 

 fcfeK your arrhiza maculosa and the europaean are identical in the 

 size of their cells^ and in contrast to brasiliensis smaller 

 celled.I used specimens frora Michigan (Bigelow) for examinatiorr; 

 in examining dried specimens, it is best to use the epidermis cells 



( ( surf ace with 4 00 to compare with lower) and the stoma- 



vensi^s. 



ta, and I find, that brasilO"~~ r ^ original! s differ in average di~ 

 mensions on^y little: : the latter with few large cells, but differs 

 in this point 4 considerably from arrhiza europaea and also arrhiza 

 maculos a and brasiliensis orig. stand much lower than arrhiza euro - 

 paea . It will form a kind of connectiner link between the two latter,, 

 also on account of the lesser pigmentation. Thus, we have the choice 

 between k kinds: 1) all 3 forms form one species, against which- there 

 is not much to be said,lf only for the arrhiza of the old world no 

 pigment cells exist. 2) 3 species, this can hardly be accompli shed, , 

 until sometime later material from other parts of America are present.. 

 3) arrhiza . maculosa is joined with arrhiza and is separated froirr 

 brasiliensis 4) arrhiza maculosa is being combined with brasilierr- 

 sls and is being separated from arrhi za ,and would be called brasi- 

 liensis . This would be the most inoportune, and L. arrhiza maculosa 

 is beinst united with brasiliensis and separated from arrhiza ; this 

 seems to me, from what I have seen so far, the most oportune, though 

 I have often pronounced, that in all such cases,where Interim forms 

 exist between true specimens of very different species, according 

 to my conviction the systematic order will limp, and - au font - one 

 can only deal with the volitio, . 



As I get to such problems, I must exaraine the presently re - 



ceived Wolffias from Illinois carefully and compare them with other 

 forms. 



