North American Fungi. 165 



4. T. campestre, Morg. n. sp Peridium depressed-globose, the 

 brown scaly cortex gradually falling away; inner peridium thickish, 

 submembranaceous, becoming smooth and whitish ; mouth plane, 

 irregular, lacerate, not fimbriate. Stipe long, thick, nearly equal, 

 with broad brown scales, white within and fibrillose-stuffed, with a 

 small, irregular, mycelial bulb at the base. Threads of the capilli- 

 tium long, slender, about as thick as the spores, hyaline, branched : 

 spores irregu'arly globose, pile brown, very minutely waned, 

 4.5-5.5 mic. in diameter. 



Growing in sandy soil. Nebraska, Webber ; California, Under- 

 wood. Plant 1-3 inches in height, the peridium %-% of an inch 

 in diameter, the stipe about ^ of an inch in thickness. This 

 species has hitherto been referred to T. Berteroanum, Lev., but it 

 appears to differ from it essentially in the character of the mouth ; 

 this is only a torn aperture, sometimes a mere slit, not at all ele- 

 vated, nor ciliate-fringed. It is a much larger plant than T. fimbri- 

 atum. 



5. T. Meyenianum, Kl. Peridium depressed-globose ; the cortex 

 soon seceding, leaving a smooth whitish or yellowish surface to the 

 submembranaceous inner peridium, the apex plane with a lacerate 

 mouth. Stipe long, thick, unequal, fusiform or tapering, nearly 

 solid, sulcate. Threads of the capillitium long, much thicker than 

 the spores, branched, hyaline; spores subglobose, even, pale 

 brown, 4.5-5.5 mic. in diameter. 



Growing in sandy soil. New Mexico, Wright : Colorado, Web- 

 ber. Plant 2-4 inches in height, the peridium Y^-i inch in diameter, 

 the stipe about y 2 of an inch in thickness at the thickest part. 

 Specimens referred to T. angolense, W. & C, do not differ otherwise 

 than in having the stipe thickest at the apex and tapering down- 

 ward instead of fusiform. T. obesum, C. & E., appears to be 

 founded on a specimen with the short thick stipe not fully devel- 

 oped. 



Genus VIII. — Calvatia, Fr. 



Mycelium fibrous, usually thick and cord-like, rooting from the 

 base. Peridium large, globose and nearly sessile, or turbinate 

 with a well-developed base ; cortex a very thin adherent layer, 

 often smooth and continuous, sometimes composed of minute spin- 

 ules or granules; inner peridium a loosely woven and very fragile 

 covering, after maturity breaking up into fragments from above 

 downward and gradually falling away. Subgleba cellulose, mostly 



