[Vol. 6 



58 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



hyaline pseudoparenchyma extending parallel with the 

 surface; stipe concolorous, about 5 mm. long and 2 

 mm. in diameter, stupose, of fine hyaline hyphae; sterile 

 base a conical projection of the stipe extending into the gleba 

 but not percurrent; gleba covered above, exposed below, not 



decurrent but sinuate about the stipe, con- 

 colorous with the peridium; cavities minute, 

 irregular; septa 60-80 p broad (including 

 hymenia), hyaline, composed of pseudopar- 

 enchymatous cells, not scissile ; cystidia rare- 

 ly present, clavate, apiculate, 9-10x20-24 ^t, 

 hyaline; basidia small, 5-8x18-22 /*, cylindri- 

 cal to clavate, 2-4-spored, hyaline; spores 

 spherical to broadly ovate, hyaline, ap- 

 Fig. 3 pendaged, 6-8 n in diameter, one large 



m. echinosporus. vacuole, finely and sparingly echinulate. 

 S ia From 1 ?™!!' Hypogaeous under Quercus agrifolia. Cali- 



X 625. From type. 



fornia. March. 



Macowanites echinosporus is distinct from M. agaricinus 

 in spore characters, color of the fructifications, relation of 

 gleba to stipe, and in that the columella does not extend to the 

 peridium above. The generic description has been emended 

 to include these characters. 



Specimen examined: 

 California: East Oakland, N. L. Gardner, type (in Univ. Cal. 



Herb., 402, and Zeller Herb., 1624). 



EXTRA-LIMITAL SPECIES 



The type species of this hitherto monotypic genus has 

 not been found in North America, but the original description 

 is appended for taxonomic convenience. 



1. Macowanites agaricinus Kalchbrenner in Sacc. Syll. 

 Fung. 7 : 179. 1888. 



Macowania agaricina Kalchbr. in Gardeners J Chron. N. S. 



5 : 785. 1876. 



Illustrations: Kalchbrenner, Gardeners' Chron. N. S. 5 : 

 785. /. HI; Fischer in Engler & Prantl, Die Nat. Pflanzenfam. 



