400 THE AGARICACEAE OF MICHIGAN 



which is well shown in Fries' figures. There is a tendency for the 

 cap and stem to become stained dark reddish in age. Ricken has 

 changed the description somewhat as to the color of the young gills. 

 In our plants, however, they were not olive-yellow although such 

 a variation is to be expected where the fiesh has that color. Ricken 

 also gives spore-measurements which are too large for those of my 

 collection. A variety of C. cinnamomeus was found under white 

 pine and beech at New Richmond, which was fulvous on the cap 

 ami stem and with a slight olive tinge on the gills. A series of 

 intermediate forms between this and G. cinnamomeus seems to exist. 



408. Cortinarius semisanguineus Fr. 



Syst. Myc, 1821 (as var. of C. cinnamomeus) . 



Illustrations: Cooke, 111., PI. 779. 



Gillet, Champignons de France, No. 250. 



Atkinson, Mushrooms, Fig. 151, p. 102, 1900. 



White, Conn. State Geol. & Nat. Hist. Surv., Bull. 3, Plate 20, 



1905. 

 Peck, N. Y. State Mus. Rep. 48, PI. 13, Fig. 15-20, 1896. 



PILEUS 2-6 cm. broad, campanulate-convex, subumbonate, (vary- 

 ing to conie-campanulate or broadly hemispherical, often at length 

 expanded and split on margin) tawny-yellow to cinnamon-yellow, 

 silky or delicately fibrillose-scaly, sometimes shining-zoned. 

 FLESH dingy yellowish-white, rather firm. GILLS adnate-sub- 

 decurrent, narrow, crowded, cinnabar or blood-red. STEM 3-6 cm. 

 long (longer on sphagnum), 3-6 mm. thick, equal or subequal, solid- 

 fibrous, chrome to citron-yellow, fibrillose from the yellow or tawny- 

 yellow CORTINA, elastic. SPORES elliptical, smooth, 5-7x3-4 

 micr. BASIDIA 24x6 micr., 4-spored. ODOR and TASTE mild. 



Gregarious or subcaespitose. In low moist swamps, sphagnum, 

 etc. Throughout the State. August-October. Frequent. 



Usually considered a variety of C. cinnamomeus. There are some 

 forms which could be called varieties of this in turn. This shows that 

 in the present group we have what is well known to exist in the 

 higher plants, namely, an innumerable number of very closely related 

 sp.-cies, or varieties, or forms, or any other term which expresses 

 difference. For convenience Ave group a larger or smaller number 

 of these "different" but almost like forms together and call them 

 species. As details accumulate it is easier to keep the details iu 



