CLASSIFICATION OP AGARICS 167 



151. Russula lutea Fr. (Edible) 



Syst. Myc, 1821. 



Illustrations: Cooke, 111., PL 10S2. 



Gillet, Champignons de France, No. G22. 

 Patonillard, Tab. Analyt., No. 321. 

 Bresadola, Fnngh. mang. e. vel., PL 79. 

 Michael, Fiihrer f. Pilzfreunde, No. 01. 

 Eicken, Bliltterpilze, PL 18, Fig. 3. 

 Plate XXII of this Report. 



PILEUS 3-6 cm. broad; small, thin, convex then piano-depressed, 

 pellicle easily separable, viscid, margin even, becoming slightly 

 striate in age, unicolorus, bright yellow or pale golden yellow. 

 FLESH white, very thin, fragile. GILLS at length deep yellow- 

 ocJiraceoiis, subdfstant, rather broad in front, narrowed behind and 

 free, equal, interspaces often venose. STEM white, unchanged, 

 subequal, stuffed then hollow, soft, fragile, even or obscurely 

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

 echinnlate, yellow, 8-10 micr. in diam. TASTE mild. ODOR none. 



Solitary, in coniferous and mixed woods of northern Michigan, 

 in frondose woods in the south. July and August. Infrequent and 

 feAV in number. 



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 but relatively 

 broad 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 saj^s he has found it but once in New York. 

 I have found it a number of times in Michigan. R. vitelHna Fr. 

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

 Sweden, and he refers all their forms to 7?. lutea. It may be that 

 R. lutea and R. vitellina represent extremes of the species. Our 

 plant described above and that about Stockholm do not agree with 

 either of the descriptions, but is a compromise between 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. Ac- 

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

 in coniferous woods. R. faricep.'^ Pk. is said to be larger, with nar- 

 row and close, pale yellow gills. 



