192 THE GASTEROMYCETES OF THE UNITED STATES AND CANADA 



on almost all herbarium specimens. When the exoperidial cap falls off, that part of 

 the inner surface which was touching the mouth ridges is seen to be red, other parts 

 of the inner surface are a distinct light yellow, as is also the freshly exposed surface of 

 the inner peridium, the color being due to minute, inherent, bran-like scales. These 

 scales get larger downward and merge into the larger scales above mentioned. Endo- 

 peridium tan or clay color, at length brown, the exposed surface dull and somewhat 

 glaucous-looking, 7-18 mm. in diameter when fresh, 5.5-11 mm. when dry; mouth 

 composed of about 5 rays, bright red when fresh, fading with age. Spore sac white. 

 Spores (of No. 1488) white, clear, with one or two large oil drops, variable in size 

 and shape, usually oblong-elliptic, a few nearly spherical, 6.5-7 x 10-1 7m; surface ap- 

 pearing smooth except under high power, then seen to be very minutely and closely 

 pitted, showing faint radial lines through the walls. 



This species is easily distinguished by the non-gelatinous exoperidium, clay colored 

 endoperidium spotted with scales and particles, and the very faintly punctate spores. 

 Mitremyces Tylerii Lloyd (Myc. Notes, p. 240) is probably only a small form of this 

 species. One finds at times very small plants without obvious stalks mixed with more 

 typical ones. 



Illustrations: Berkeley. Trans. Linn. Soc. 22: pi. 25 B. 



Lloyd. 1. c, pi. 9, figs. 4-6; pi. 68, figs. 3S. 



Marshall. Mushroom Book, pi. opposite p. 132 (good). 

 Massee. 1. c. (1903), pi. 3, figs. 26-28. 



58. Among moss on hillside in open mixed woods, Sept. 27, 1910. Spores 6.5-8 x 8.6-14^. 

 1488. On ground in open woods, Dec. 7, 1914. 

 2872. By path in Battle's Park, Oct. 5, 1917. Spores variable in size and shape, distinctly pitted, 



4.8-6.6 x 8.6-18m. 

 AkoNos. 119a, 1518, 1519. 



Asheville. Beardslee, coll. Aug. 1918. Spores 6.2-7.4 x 11-17^. 

 Columbus Co. Barlow, coll. No. 49. July 1909. 

 Caesar's Head. Ravenel, coll. (Curtis Herb., co-types). 



Alabama. Moulton. Peters, coll. (Curtis Herb., as M. lutescens) Spores oblong (as shown by sketch) 



and case warted. • 



Mobile. Mohr, coll. (U. S. Nat'l. Herb., us Mitremyces). 

 Kentucky. Conway. B. Fink, coll. (N. Y. B. G. Herb.). 

 Delaware. Wilmington. Commons, coll. (U. S. Nat'l. Herb. , as M. lutescens) . 

 Pennsylvania. Center Co. Adams, coll. (N. Y.|B. G. Herb.). Spores elliptic, obscurely pitted, 



6-7.5 x 8-13/.. 



Calostoma microsporum Atk. 



The following description is from Atkinson (Journ. Myc. 9: 16. 1903): 



"Plants 4-7 cm. high, foot stalk 3-6 cm. by 1-2 cm., cylindrical or ventricose or 

 enlarged below, sometimes compressed, rarely two foot stalks joined throughout the 

 entire length. Peridium oval, 10-15 mm. broad; teeth 5-7, prominent, vermilion 

 colored on their inner faces; exoperidium separating into numerous small hard adherent 

 warts, covering the middle and lower surface of the endoperidium, usually entirely 

 separating from the upper surface, leaving a smooth area on the inner peridium around 

 the mouth. Spores white, smooth, oblong, some rarely elliptical, 6-10 x 3.5-5ji. 

 Protoplasm usually homogeneous, sometimes granular, often showing a tendency to 

 be constricted at the middle, perhaps because of a clear area at this point." 



