332 SECTION HYGROPHORUS 



New York, North Carolina, Michigan, and Illinois, July-November. 



Material Studied — district of Columbia: Williams (Peck's type, 

 Takoma Park, Nov. 1897). Illinois: Leathers, Coles Co., Sept. 24, 1949. 

 Maryland: Charles, near Cabin John, Nov. 9, 1911. Massachusetts: 

 Bigelow 9411. Michigan: Kauffman 604 (1362); Smith 6071, 6113, 

 7093, 7295, 15322, 18487, 18775, 18915, 21165, 32012, 34212, 36320, 

 62291. new york: Kauffman, Ithaca, Aug. 14, 1903. north Carolina: 

 Coker 2004; Totten & Holland, Chapel Hill, Nov. 16, 1919. 



Observations — Notes on the type: Spores 6-8 X 4-5.5 //,, ellipsoid, 

 smooth, pale yellow in Melzer's reagent. Basidia 40-52 X 5-7 /x, 4- 

 spored. Pleurocystidia and cheilocystidia none. Gill trama divergent, 

 hyphae 2-4 fx broad. Cuticle of gelatinous hyphae ( see above ) . Clamp 

 connections present in the cuticle. 



Peck recognized the close similarity of this species to H. penarius 

 Fr. It differs from the latter in the absence of a gelatinous universal 

 veil, the typically white gills and pileus, and obscurely floccose apical 

 region of the stipe. H. penarius may occur in the United States. Forms 

 which apparently were H. penarius have been found in Michigan but 

 not in good enough condition to permit a critical study. 



In Tennessee, Georgia, and Alabama, there is a common white 

 species, H. ponderatus, which resembles H. sordidus, but the former 

 has a viscid stipe. 



SERIES PUDORINI (Bataille) stat. nov. 



Subsection Pudorini Bataille, Flore Monogr. Hvgrophores, p. 32. 

 1910. 



Characters as given in key to series, page 309. 

 Type species: H. pudorinus Fr. 



Key to Varieties and Forms 



1. Stipe viscid, odor of jasmine 



(see H. pudorinus sensu Klihner & Romagnesi, 1953: 57) 



1 . Stipe not viscid, odor slight to pronounced 2 



2. Pileus pallid to whitish, or the disc merely with yellowish tint .... 



204. H. pudorinus var. fragrans f. pallidus 



2. Not colored as above 3 



3. Pileus tinged grayish on disc 205. H. pudorinus var. subcinereus 



3. Pileus pallid pinkish to salmon color 4 



4. Pileus up to 20 cm broad; stipe becoming zinc orange in base 



203. //. pudorinus var. fragrans 



4. Pileus 3-12 cm broad; stipe merely yellowish in base or base not col- 

 ored 202. H. pudorinus var. pudorinus f. pudorinus 





