90 ELEVENTH REPORT. 



56. RussuLA lutp:a Fr. 

 (The egg-yellow small Russula.) 



t PiLEus 3-6 cm. broad, small, thin, convex then piano-depressed, pellicle 

 easily separable, viscid, margin even, Ijecoming slightly striate in age, uni- 

 colorus, bright yellow or pale golden yellow. Flesh white, very thin, fragile. 

 Gills at length deep yellow-ochraceous, suhdistant, rather broad in front, 

 narrowed l^ehind and free, ecjual, interspaces often venose. Stem white, 

 unchanged, subequal, stuffed then hollow, soft, fragile, even or ol")Scurely 

 wrinkled, glabrous, 3-5 cm. long, 4-8 mm. thick. Spores globose, echinulate, 

 yellow 8-10 micr. in diam. Taste mild. Odor none. 



Solitary. Coniferous and mixetl woods of northern Michigan. July and 

 August. Infrequent. 



Our plant is the same as the one occurring about Stockholm. It agrees 

 with the characters as given in Hymenomycetes Europaei, except that the gills 

 are subdistant, not truly narrow liut relatively Inroad in front. The Stockholm 

 specimens had the thin margins of the pileus at length slightly striate, as is 

 also the case with the Michigan plants. Peck says he has found it but once 

 in New York. I have found it a number of times in Michigan. R. vitellina 

 Fr. which is said to resemble this species, is not known to Romell for Sweden, 

 who refers all their forms to R. lutea. It may he that R. liitea and R. vitellina 

 represent extremes of the species. Our plant described above, and that about 

 Stockholm do not agree wdth either of the descriptions, and my; description 

 is a compromise l^etween the two. Our plants are not strongly striate nor 

 have they any marked odor like R. vitellina; on the other hand they have 

 broader and more distant gills than is warranted by the description of R. 

 lutea. According to Fries, R. lutea is found in beech forests and R. vitellina 

 in coniferous woods. Morgan and Mcllvaine report R. lutea from Ijeech 

 woods. R. citrina Gill, has already been referred to R. lutea by Gillet himself, 

 and so falls out of the discussion. R. flaviceps Pk. is said to be larger, with 

 narrow and close, pale yellow gills. If we have a number of species of this 

 color in the state, they have not been found in sufficient quantity to settle 

 all the points raised above. 



