80 



Mycologia 



deciduous. My notes refer to it in the fresh state as "milk- 

 white all over, rather soft," " cream-colored," " fairly soft when 

 fresh and not so yellow," etc. 



Both the margin and the hymenium vary from white to yel- 

 lowish according to age and position on the substratum. There 

 are also thin, tuberculose, vesiculose, and other forms presenting 

 unusual variety in appearance so that it is no wonder that much 

 confusion has arisen regarding the limitations of the species and 

 its relationship. According to Overholts, who has examined the 

 types since I have, the spores are oblong-ellipsoid or ovoid, 

 4.5-6 X 2.5-3.5 an d there are variable cystidia-like structures 

 among the basidia. I have never noticed any prominent sub- 

 acid odor. 



The following named hosts are represented in our herbarium : 

 pine, spruce, Douglas spruce, hemlock, fir, cedar, oak, maple, 

 birch, cherry, and butternut. 



Most of the specific names for this plant were published about 

 the same time. The name in common use is retained until a fair 

 degree of certainty can be reached regarding two or more doubt- 

 ful species. I have a specimen which I collected at Lake Placid 

 in October, 1912, on the underside of a coniferous log, which 

 shows the depressed spots described for P. ornatus, but I hesitate 

 at this time to displace P. acida simply on page priority without 

 a little more evidence. 



Poria subacida (Peck) Sacc. Syll. Fung. 6: 325. 1888 



fPolyporus induratus Peck, Ann. Rep. N. Y. State Mus. 31 : 37. 

 1879. Myriadoporus induratus Peck, Bull. Torrey Club It : 

 27. 1884. 



fPolyporus ornatus Peck, Ann. Rep. N. Y. State Mus. 38: 92. 

 1885. 



Polyporus subacidus Peck, Ann. Rep. N. Y. State Mus. 38 : 92. 



i88 5 . 



Poria Beaumontill Berk. & Curt. ; Cooke, Grevillea 15 : 26. 1886. 

 Poria omoema Berk. ; Cooke, Grevillea 15 : 26. 1886. 

 Poria subaurantia Berk. ; Cooke, Grevillea 15 : 27. 1886. 



Peck's species were described from New York and the others 



