BoT.— Vol. I.] HARKNESS—CALIFORNIAN HYPOGMI. 2^1 



In sandy ground, Golden Gate Park, San Francisco, 

 Calif., April. 



8i. Geopora mesenterica, sp. nov. 



Plate XLIII, Figs. i2a-\2c. 



Smooth, irregular, 5 cm. in diam., color dirty white; gleba ferruginous 

 brown; parenchyma convolute; asci cylindrical, 102 x 12 /jt; with elongated 

 pedicel, 8-spored; spores white, ovoid, smooth, 10 x 12 11. 



Type, No. 37, Harkness Coll. 



Under Ceanothus in decaying vegetable humus, Auburn 



and Wire Bridge, Placer County, Calif., May. 



Tuber Micheli. 



Tuber Micheli, Nov. PI. Gen., p. 221. 



Asci short, saccate, disposed in sinuous veins. Sporidia elliptic, reticulate, 

 often echinulate. Peridium warty or tubercled, rarely smooth, without any 

 definite base. (Berk. Outlines Brit. Fung., p. 376.) 



82. Tuber (Eutuber) citrinum, sp. nov. 

 Plate XLV, Figs. 300-30^. 



Subglobose, 2 cm. in diam., irregular, warty, fissured, color citron, turning 

 to pale brown; gleba white; asci globose, enclosed in wavy filaments; spores 

 two to three, seldom four; spores ellipsoidal, reticulate-alveolate, dark 

 brown, 30 x 42 /x; about eighteen alveoli on the circumference of the spore. 



Type, No. 123, Harkness Coll. 



In forest, Tamalpais, Marin County, Calif., May. 



Resembling T. rapceodorum Tul. excepting in form and 

 the structure of the gleba. 



83. Tuber (Eutuber) monticolum, sp. nov. 



Minute, globose, 1.5 cm. in diam., smooth, color dirty white, fissured, with 

 a slightly defined sterile base; gleba white, firm; asci globose, briefly stipi- 

 tate, 2-4-spored; spores ellipsoidal, dark, reticulate-alveolate, 36x25/^. 



Type, No. 27, Harkness Coll. 



Among firs in dense woods in Sierra Nevada mountains 

 at Towle, Placer County, Calif., July. 



