158 



Mycologia 



and Miss Gilkey ; while the critical study and comparison was 

 made by Miss Gilkey, whose results are freely incorporated. The 

 description was originally drawn by Dr. H. W. Harkness, of 

 California, in December, 1899, shortly before his death, but his 

 measurements and terms have been somewhat changed. 



Tuber Shearii Harkness, sp. nov. 



Ascocarp very small, subrotund or slightly elongate; surface 

 smooth, creamy-buff ; gleba drab ; veins minute ; asci many, sub- 

 globose, 50-70 fj, in diameter, 1-3-spored ; spores globose or sub- 

 globose, dark-brown, alveolate, minutely reticulate beneath the 

 alveoli, 28-49 /x i n diameter; alveoli 9-10 X 5-6 /x across di- 

 ameters. 



Type collected under Pinus inops in Takoma Park, Maryland, 

 October, 1899, C. L. Shear. The specimens sent to Dr. Hark- 

 ness could not be found, but Dr. Shear still had a portion of the 

 original collection and this was sent to Miss Gilkey for examina- 

 tion. Under date of February 14, 1920, she wrote me as follows : 



" After having very carefully compared the co-type of Tuber 

 Shearii, which Dr. Shear sent me last week, with material of T. 

 unicolor, I do not consider the two plants similar. T. Shearii 

 has much larger spores with distinctly different sculpturing and 

 color and these differences are constant for all the material 

 studied. Other than spore differences probably occur in these 

 two species, but since all my material of one was dried while 

 the other is in formalin, and since you wished an immediate 

 answer, I have not yet taken time to investigate further, par- 

 ticularly since the constant differences in spores are sufficiently 

 distinctive, in my judgment, to separate the two." 



New York Botanical Garden. • . 



