SI BS1 CTION MICRi BPORI Sfl 



from New-found Gap, Great Smok) Mts. National Park, iug. 11. 

 1938). 



Observations — Tin's is a ven beautiful species and apparentl) 

 very similar to //. palUdus and //. subviolaceus. It differs in its cai 

 cent pilous when young, dark-eolored stipe | the specimens were grow- 

 ing in deep shade), and smaller spores. In the dried eondition it re 



sembles H. basidiosus in appearance, bul since most members of the 



//. protends series look much alike when dried, a great deal of empha- 

 sis cannot justifiably be placed on that character. When fresh //. Ixisi- 

 diosus and //. canescens should be readily distinguishable 1>\ the dif- 

 ference in the colors of the pileus and stipe and the lack of striatums 

 on the 1 pileus of H. canescens. 



32 



Hvgrophorus microsporia Sm. & Hes. 



Llovdia 5: 11. 1942 



Hifgrotrama microsporum (Sm. & Hes.) Singer. Sydowia 12: 223. 



1958 (1959). 

 ArmilhrieUa microspora (Sm. & Hes.) Singer, Lilloa 22: 216. 1951. 



Illustration: 

 Fig. 8h. 



Pileus 1-2 cm broad, broadlv convex becoming plane, the margin 

 regularlv recurved in age, "fuscous" (very dark gray with a tinge of 

 brown) over all, opaque when moist, fading to "drab" or paler (me- 

 dium to pale gray), surface moist, glabrous at least in age, somewhat 

 hvgrophanous, somewhat atomate after losing moisture. Context thin, 

 fragile, waxy, dark grayish becoming pallid; taste perfectlv mild, odor 

 none. 



Lamellae long-decurrent, whitish to pallid, becoming sordid gray 

 in age but drving much lighter than the pileus (yellowish in spots on 

 one old individual), close, narrow, intervenose, edges even. 



Stipe 2.5-3.5 cm long, 2-3 mm thick at the apex, surface evenly 

 colored and concolorous with the pileus, narrowed toward the base, 

 flexuous, stuffed, becoming hollow, perfectly glabrous. 



Spores (3)4-4.5 X 2.5-3 /x, ellipsoid to subglobose, smooth, pale 

 yellowish in Melzer's reagent. Basidia 23-32 x 4-6 p, 4-spored. Pleuro- 

 cystidia and cheilocystidia none. Gill trama of slightly interwoven In - 

 phae to subparallel in dried material (definitely interwoven in fresh 

 material — see Smith and Hosier. 1942, p. 11 ), 2.5-5 ( S) f x broad. Cuticle 

 of more or less erect (but finally repent), septate, fuscous, constricted 

 non-gelatinous hvphae, the terminal elements cystidioid — a trichoder- 

 mium (not a palisade), accompanied by a few slender hvphae with 



