432 White : Tyi-ostomaceae of North America 



9. Tylostoma campestre Morg. Jour. Cin. Soc. Nat. Hist. 

 12 : 163. pi. 16. f. 4. 1890 



Peridium subglobose, 1-1.5 cm. high, 1-2 cm. in diameter: 

 outer peridium brown, scaly, retreating and leaving an irregular 

 ring around the lower part of the smooth inner peridium : collar 

 irregular, descending about the top of the stem : mouth plane, 

 lacerate, in some specimens being a mere crack or slit : stem 

 rather thick, 3— ID cm. long, i — 1.5 cm. in diameter, darker than 

 the peridium, fibrillose stuffed, becoming hollow, outer brownish 

 coat lacerate, scaly, and having a small thickened mycelial bulb : 

 capillitium yellowish, hyaline, cylindrical, 4-8/^ wide, branched, 

 septate, somewhat swollen at the septa : spores subglobose, warty, 

 some short pedicled, 3-5 n wide. (PI. 33, f. 10-12.) 



Exsicc : E. & E. N. A. Fungi, 3297 (as T. gramilosiun 

 Sw. ?), 3514. 



Nebraska: Webber, Bates; California: Underwood, Mc- 

 Clatchie ; Colorado, Crandall. Growing singly and in groups 

 in sandy soil. 



10. Tylostoma exasperatum Mont. Ann. Sci. Nat. II. 8 : 362. 



1837 



Peridium subglobose, 1.2 cm. high, 1.3 cm. in diameter: outer 

 peridium composed of long spinulose scales, somewhat reflexed, 

 which recede from the top downward, leaving the brown inner 

 peridium marked with a series of regular pits : mouth raised, fim- 

 briate lacerate, rather large : collar inconspicuous : stem equal, 

 slightly enlarged at the base, 5-7 mm. in diameter, 3.5 cm. long, 

 covered with reflexed lacerate scales, like those on the outer peri- 

 dium : dark brown: capillitium whitish-yellow, hyaline, 4-6 « 

 wide, branched, free ends rounded, sparingly septate, not much 

 swollen at the joints : spores globose, furnished with long blunt 

 spinules, 5-8/^ in diameter. (PI. -^i, f. 1-3.) 



Cuba, Wriglit. 



1 1 . Tylostoma tuberculatum sp. nov. 



Peridium depressed globose, 1-1.2 cm. high, 1-1.8 cm. in di- 

 ameter : outer peridium scaly, retreating, leaving a wide band 

 around the base of the whitish, smooth, and rather thin, inner 

 peridium : mouth raised, fimbriate, roundish : collar close, incon- 

 spicuous : stem slender, whitish, hollow or stuffed, slightly en- 

 larged at the base, 2-3 cm. long, 3 mm. in diameter : capillitium 

 light yellow, hyaline, branched, thick-walled, variable as to width, 

 4-8 n wide, rather flattened, ends rounded, broad, sparingly sep- 



