646 THE AGARICACEAE OF MICHIGAN 



the same as the European L. hacmatosperma (Agaricus haemato- 

 sperma of Hymen. Europ.), as well as L. badhami Berk. In these 

 also the flesh changes to reddish in age or on drying. The French 

 mycologists (Quel, and Battaile, Ainan. et Lep., 1902, p. 73 ) have 

 taken exception to this view, claiming that L. hacmatosperma ac- 

 tually has reddish or purplish spores when mature, while L. bad- 

 liiimi has white spores. Hence the American name must be retain- 

 ed. Our plants can be distinguished from our other Lepiotas by 

 this character of the flesh. The shape of the stem imitates at times 

 that of L. cepaestipcs, being enlarged just above the base, sometimes, 

 however, it merely tapers from the very bottom ; in the former case 

 the base is sometimes short-pointed. The pileus is sometimes 

 almost entirely white when fresh. The gills and flesh may assume 

 a yellow tinge at first. 



689. Lepiota naucina Fr. (Edible) 

 Epicrisis, 1836-38. 



Illustrations : N. Y. State Mus. Rep. 48, Plate 19, 1896. 

 Gillet, Champignons de France, No. 428. 

 Atkinson, Mushrooms, Figs. 79-80, p. 76-78. 

 Bresadola, Fungh. mang. e. vel., PI. 15. 

 Mcllvaine, Amer. Mushrooms, Plate XV, p. 44. 

 Ricken, Blatterpilze, PL S4, Fig. 2. 

 Plates CXXXV, CXXXVI of this Report. 



PILEUS 4-8 cm. broad, at first subglobose to ovoid, then convex 

 to subexpanded, obtuse, soft, glabrous, rarely broken into scales on 

 the surface, white or smoky-white. FLESH white, thick, rather 

 firm, abruptly thin on margin. GILLS free, not remote, close, 

 moderately broad, narrowed behind, white at first, slowly changing 

 to pinkish then dingy-brown, edge minutely flocculose. STEM 5-10 

 cm. long, 6-12 mm. thick above, tapering upward from a thickened 

 base, sometimes subequal, stuffed then hollow, glabrous or silky 

 below Hie ring, pruinose above, white within and without. AN- 

 M LI'S formed from the membranous veil and outer layer of stem; 

 'I"- latter is shown peeled off up to the ring in the section of the 

 young plant in our illustration. It is white, rolled together in the 

 form of a collar, persistent and superior, in age it often becomes 

 movable. SPORES elliptic-oval. 7-9x3-0 micr.. but variable, some 

 longer, occasionally abnormal and then spherical, nucleate, smooth, 

 white. ODOR and TASTE mild. 



