SUBSECTION CAMAROPIIYLLI 347 



Spores 6-8 X 3-4.5(5) fx, ellipsoid, smooth, white in deposits, yel- 

 lowish in Melzer's reagent. Basidia 40-53 X 5-6 /z, 4-spored. Pleuro- 

 cystidia and cheilocystidia none. Gill trama divergent with a medio- 

 strate composed of large hyphae, 5-16 fi broad. Cuticle a well-defined 

 gelatinous zone, 50-180 ^ thick, with slender hyphae, 2-4 /x broad, 

 loosely interwoven, imbedded (an ixotrichodermium, not a palisade). 

 Fibril-aggregations on the pileus consist of mounds of brownish hyphae 

 together with a brown pigment in the gluten. Hypodermium none 

 differentiated. Pileus trama homogeneous, interwoven, radially dis- 

 posed. Clamp connections present on the gill trama and cuticular hy- 

 phae. 



Habit, Habitat, and Distribution — Gregarious, at times in arcs 

 or fairy rings, in oak and mixed oak-pine woods, Canada, Massachu- 

 setts, New York, Michigan, Illinois, Tennessee, North Carolina, Ala- 

 bama, Texas, and Washington; also Europe; August-December. 



Material Studied — Alabama: Burke 2090, Robinson Springs, 

 Nov. 29, 1942. Illinois: Leathers, Charleston, Sept. 28, 1949. Massa- 

 chusetts: Bigelow 8709; Seymour, Boston, Sept. 20, 1911. Michigan: 

 Kauffman 1359 (99), Marquette, Sept. 3, 1906; Smith 14938, 15285, 

 20725, 20773, 38383, 58151, 62124. new york: Kauffman, Ithaca, Oct. 4, 

 16, and 17, 1902. Tennessee: Hesler 4442, 4457, 4458, 9642, 13021, 

 14765, 16577, 19441, 19468. texas: Thiers 1918, 4725. Washington: 

 Kauffman, Olympic Mts., Oct. 16, 1915. Canada: Bell 3764; Groves 

 8783, 21900; Smith 835, 14644. Belgium: Heinemann 2037. 



Observations — Hijgrophorus erubescens is most closely related to 

 H. russula, but in the latter the lamellae are close to crowded ( 120-130 

 reach the stipe), and it usually grows in deciduous woods. In H. erube- 

 scens the lamellae are subdistant to close (75-95 reach the stipe); it 

 grows in coniferous woods; the pilei are usually smaller and less com- 

 pact; the stipes more slender; and the color-change to yellow when 

 bruised is more pronounced. 



211 



Hygrophorus capreolarius ( Kalchbr. ) Sacc. 

 Fl. Ital. Crypt., Hymen., p. 342. 1915 



Illustrations: 

 Fig. 109. 

 Bresadola, Icon. Myc, tab. 307. 



Pileus 3-6(7) cm broad, convex-expanded, obtuse or subumbonate, 

 "Vandyke red" and unicolorous, delicately streaked with purplish fi- 

 brils, viscid, soon dry, appressed scaly-dotted on the disc in age, the 

 thick margin at first incurved and white silky. Context rather thick, 



