LEUCOSPORI. 25 



****'^ Mesomorphi. Smaller, slender, &^c. Lepiota. 



42. A. sistratus Fr. — Pileus 2.5-4 cent. {i-i}4 in.) broad when 

 flattened, whitish, often darker at the disc, turning light-yellowish 

 or flesh-colour, slightly fleshy, campanulate, then expanded and 

 obsoletely umbonate, printiate with shining ato7ns ; flesh thin, 

 soft, fragile, whitish. Stem 5-7.5 cent. (2-3 in.) long, 2-4 mm. 

 (1-2 lin.) \\v\c\i, Jistiilose, scarcely stuffed within with lax spider- 

 web fibrils, equal, silky Jibrillose and pruinate, white. Ring fib- 

 rillose, torn, appendicidate round the margin ofthepiletis, very fuga- 

 cious. Gills free, but reaching the stem, crowded, 4 mm. (2 lin.) 

 broad, white. 



Thin, delicate, fragile. Nearest to ^. meso7norphtis hnW. in natural afifinity. 



On sandy ground. Forres, 



Remarkable for the filamentous ring. B. &= Br. Name — sistrum, a rattle 

 used in the rites of Isis. From some fancied resemblance in form. Fr. Monogr. 

 i. /. 30. Hym. Eur. p. 37. Icon. t. 15./. 3. B. fir" Br. Ji. 1185. S. Mycol. 

 Scot. n. 28. C. Illust. PL 85. 



43. A. seminudus Lasch. —Pileus whitish or flesh - colour, 

 slightly fleshy, campanulato-expanded, wwiQoxxdX^, floccoso-mealy, 

 at length naked, appendiculate at the margin with the torn veil. 

 Stem fistulose, thin, mealy. GiUs reaching the stem, thin, white. 



Very thin, delicate. 



In woods. King's Lynn, &c. 



Spores 4X 2 mk. B. ^ Br. Name — se7ni, half, nudus, naked. From the 

 stem remaining mealy while the pileus becomes naked. Lasch. Linn. n. ij. 

 Fr. Hym. Eur. p. 38.' B. 5f Br. n. 1634, 1836. C. Illust. PI. 19. a. 



44. A. Bucknalli B. & Br. — Pileus nearly 2.5 (i in.) broad, 

 white, sprinkled with lilac dust, campanulate then convex. Stem 

 7.5 cent. (3 in.) long, dilated at the base, sprinkled downwards 

 with lilac dust. Gills scarcely reaching the margin, white. 



Smell strong of gas-tar. 



On the ground. Bristol. 



Spores 8x3 mk. B. of Br. Name — after Cedric Bucknall. B. &= Br. 

 n. 1836. C. Illust. PI. 19. b. 



45. A. mesomorphus Bull. — Pileus reaching 2.5 cent, (i in.) 

 broad, generally less, becoming yellow or whitish, slightly fleshy, 

 very thin, campanulate then expanded, naked, dry, evejt, smooth. 

 Stem 5-7.5 cent. (2-3 in.) long, 2 mm. (i lin.) thick, fistulose, 

 slightly attenuated upwards, even, smooth, of the same colour as 



