270 SECTION HYGROPHORUS 



162 



Hygrophorus laurae Morgan 



Cincinnati Soc. Nat. Hist. Jour. 6: 180. 1883 



Illustrations: 

 Fig. 81. 



Murrill, Mvcologia 2, pi. 27, f. 10. 

 Peck, N. Y. State Mus. Bull. 54, pi. 77, figs. 6-14. 

 Morgan, Cincinnati Soc. Nat. Hist. Jour. 6, pi. 9. 



Pileus 2-10 cm broad, at times more or less umbonate, convex- 

 expanded or sometimes depressed on the disc, viscid to glutinous, 

 white or whitish, the disc washed with reddish brown, pinkish tan, 

 "cinnamon-buff," or yellowish brown, the margin at times "cartridge 

 buff," sometimes changing to "ochraceous tawny" on being dried, more 

 or less silky shining beneath the gluten, margin even, undulate or some- 

 times crenate. Context white, firm, rather thick; odor and taste not 

 distinctive. 



Lamellae broadly adnate, decurrent by a tooth, at times arcuate, 

 subdistant to close, white then flesh-tinged to "cartridge buff," nar- 

 rowed at either end, broadest at the center, at times anastomosed, 

 rarely forked, edges even. 



Stipe 2.5-7 cm long, (5)10-27 mm thick, whitish to pale buff or 

 dingy, fibrillose below, at first the apex floccose-squamulose, then fibril- 

 lose, tapering downward, sometimes curved at the base, viscid or gluti- 

 nous over the lower portion, solid, at times becoming hollow. 



Spores 5.5-7(8) X 3.5-4.5 /x, ellipsoid, smooth, pale yellowish in 

 Melzer's reagent, white in mass. Basidia 38-53 X 5-7 fi, some 2-spored, 

 mostly 4-spored. Pleurocystidia and cheilocystidia none. Gill trama di- 

 vergent, hyphae 3-7 /x broad, with scattered lactifers. Cuticle a gelati- 

 nous zone, 125-180 fx broad, hyphae more or less erect, 2.5-4 /x broad, 

 forming an ixotrichodermium. No hypodermium evident. Pileus trama 

 of interwoven hyphae, chiefly radially disposed. Clamp connections 

 present in the cuticular and the gill trama hyphae. 



Habit, Habitat, and Distribution — Gregarious to subcaespitose, 

 in deciduous and mixed coniferous-deciduous woods, Massachusetts, 

 New York, Maryland, Tennessee, North Carolina, Michigan, and Can- 

 ada ( Ontario ) , June-December. 



Material Studied — Maryland: Lyons 1455. Massachusetts: 

 Davis, Stow, Sept. 23-30, 1911. Michigan: Kauffman, Ann Arbor, Oct. 

 20, 1926, 814; Smith 5048, 15478, 20704, 34246; Thiers 4302. new 

 york: Kauffman, Ithaca, Oct. 23, 1902. north Carolina: Coker 13213; 

 Couch 3883; Kauffman, Hot Springs, Aug. 21, 1924; Totten 1392. ten- 







