CLASSIFICATION <>F AOARKS 225 



com n inn form has Bhorter spores ill L3 micr.), which are distinctly 

 angular when viewed in one plane. The deep bay disk and peculiar 

 pruinose character of the plants make h possible to identify this 

 form almost as soon as the buttons appear, see plates X LI I, X LI 1 1. 

 A less common form resembles in the young stages very small speci- 

 mens of C. micaceus. The spores arc elliptical, 11 L3 micr. long. 

 Wc have grown another larger and Lighter colored form writh two 

 spored basidia. 



213 Coprinus silvaticus Pk. 



Peck, X. Y. State Mus. Rep. 24, p. 71, L872. 

 Illustrations: [bid, PI. I. Pig. 1<> 1 I. 



PILEUS L2-30 mm. broad, convex, membranaceous, plicate-striate 

 on margin, dark brown, disk very thin, lleshy. GILLS Bub-distant, 

 narrow, adnexed, brownish then black. STEM 5 cm. high, 1 mm. 

 thick, slender, fragile, smooth, hollow, white. SPORES L2.5 micr. 

 lunjj, uihbous-ovate. On ground in woods. 



This plant was found once ;it Ann Arbor and once at Bay View. 

 The gibbous spores are very characteristic. 



214. Coprinus boudieri Quel. 



Qnelet, Bull. Soc. Bot. Fr., 1S7T. 



Peck, X. Y. State -Mus. Rep. 26, p. <;<>, as c. <ni<inl<ilus. 



Illustrations : Ibid. Tab. .".. Pig. 1. 



Lloyd, Mycological Notes, Vol. I. Pigs. 21-22, p. 17. (As C. 

 angulatu8.) 



PILEl'S 1-2.5 cm. broad, membranaceous, hemispherical, or 



convex, plicate-sulcate, reddish brown, smooth or minutely pruinose, 



disk smooth. <;ILLS subdistant, reaching the stem, whitish then 

 black, the margins often remaining white. STL.M 2.5 :. mi. long, 



1-1..") mm. thick, equal, smooth or snb-prninose. white. SPORES 



7-12x6-10 micr., compressed, angularj keystone shaped. 



Upon soil in woods. Rare. 



The peculiar angular Bub-ovate or key-tone shaped Bpores are 

 very characterisl i<- of this plant. 



29 



