12 



RESEARCHES ON FUNGI 



pp. 70, 71 ; Vol. II, Fig. 32, p. 96 ; Vol. IV, Figs. 1-20.— The photo- 

 graph shown in Fig. 4, Taf. XIII in Bd. VIII (1902) of Cohn's Beitrage 

 zur Biologie der Pfianzen and labelled (p. 344) Coprinus ephemerus Bull, 

 (in R. Falck's Kultur der Oidien bei den Basidiomyceten) is certainly 

 C. curtus and not C. ephemerus. 



Pileus 3-8 mm. high when young, 5-15 mm. broad when ex- 

 panded and flattened, foxy-red or rufescent to tan colour at first, 



becoming grey to dark grey, at first 

 oval to cylindrical or elliptical, 

 then expanded and flattened with 

 a small, strongly depressed disc, 

 splitting along the lines of the gills 

 from above downwards and be- 

 coming plicate, bearing a certain 



number of minute scattered, flaky, 

 separable, rufescent or whitish 

 scales composed of globose or 

 elliptical cells, often in chains, 

 12-30 [X in diameter, some brown 

 and some colourless, the walls 

 smooth and not ornamented with 

 evenly arranged crystals of cal- 

 cium oxalate, the pileus also villose 

 or downy with many colourless 

 hairs 70-140 X 5-10 y., tapering 

 upwards but enlarged capitately 

 at the apex where a minute drop 

 of clear fluid growing to 40 y. in 

 diameter is exuded under moist con- 

 ditions. Stipe 2-8cm. x 1-2 mm., 

 white, becoming stained with dull 

 yellow, equal, finely villose, especi- 

 ally below, owing to the presence of clavate hairs (caulocystidia) 

 similar to those present on the pileus (pilocystidia), otherwise smooth, 

 hollow. Gills grey, then black, each one at first attached to the stem 

 by the margin for its entire length, then adnexed, and finally free, 

 linear, narrow, in large fruit-bodies 4-8 x 1-1-3 mm,, in small fruit- 



FiG. 6. — Coprinus curtus. Rudimen- 

 tary fruit-bodies the day before 

 their expansion. The outer sur- 

 face of each pileus is rough with 

 small red scales and numerous 

 pilocystidia. Photographed at 

 Cornell University by the late G. 

 F. Atkinson, to whom the author 

 sent the culture. Magnification, 

 about 3. 



