PEXICILLIUM DIGITATIM. 



33 



description based upon tangible material, but have rejected his 

 citations. The following are the principal citations which have hen 

 given a- referring to this species: 



Mieheli, Genera Plantarum i L729), pi. 91, 6g. 3. 



Linnaeus, Species Plantarum (1753), II. p. L656. 



Per.-mHi, ( (lisorvations, p. -II. 



Persoon, Synopsis Fungorum, p. 693, Monilia digitata. 



Fries, Systema Mycologicum (1829), 111. p. 411, Monilia digitata. 



Saccardo, Fungi Italici i L881 i, No. 894, and Sylloge, IV. p. 79, /'. digitatum. 



Wehmer, beitr. z. Kennt. einheim. Pilze, p. 73, taf. II. 



Fig. :>.. Penicillium digitatum Saccardo: ". whole conidlophore ami fructification; '».<-. <l, < . types of branch- 

 tag and formation of conidia; m,n,o, germination of conidia; all • 



The only reasoD for retaining the name P. digitatum and ascribing 



it- authorship to Saccardo is that the description cited is the first one 

 which we can ascribe definitely to material of this species. If, as 

 -aid above, his citation of literature proves to he correct, the name 



he gives becomes untenable by present rules of nomenclature, and 

 must be changed to P. exspitosum as given by Linnaeus, although 



there is no evidence that Linnaeua actually examined material of this 

 species. Since there is more or less doubt about usages previous to 

 Saccardo. and since the name given by Saccardo has become asso- 

 8108— Bull. 118—10 3 



