CLASSIFICATION OF AGARICS 157 



R. rosacea, etc., failed repeatedly; the fragile flesh and ochraceous, 

 almost alutaceous gills are too distinctive. The maturing of the 

 spores is sometimes slow and care must be taken to get a good 

 spore print in these red species. All the collections which I have 

 referred here showed red on some or all of the stems of each col- 

 lection. Their edibility was not tested. 



137. Russula palustris Pk. 

 N. Y. State Mus. Eep. 53, 1900. 



PILEUS 4-7.5 cm. broad, fragile, subglobose or hemispheric, then 

 convex or nearly plane, viscid, pellicle separable, obscurely tuber- 

 cular-striate on margin, reddisJi-hu^^ or purplish-red especially on 

 disk, glabrous. FLESH white, thin, tinged with the color of the 

 pileus under the pellicle. GILLS narrowed behind, broader in 

 front, close to subdistant, entire, whitish then yellowish, inter- 

 venose. STEM 3-7 cm. long, 6-12 mm. thick, equal, glabrous, spongy- 

 stuffed then hollow, fragile, white or tinged red. SPORES sub- 

 globose, pale yelloiv in mass, 7.5-10 micr. TASTE tardily acrid. 



Gregarious or scattered. In low woods or swamps. Marquette, 

 New Richmond, Ann Arbor. August-September. Infrequent, 



The pileus is sometimes faintly glaucous. 



138. Russula aurantialutea Kauff. 

 Mich. Acad. Sci. Rep. 11, p. 81, 1909. 



PILEUS 5-10 cm. broad, thin, fragile, convex then piano-de- 

 pressed, yellow (citron to luteus), or with orange shades inter- 

 mingled, especially on the margin, slightly tubercular-striate, pel- 

 licle viscid, shining and somewhat separable for some distance. 

 FLESH white, thin toward the margin, unchanged with age. 

 GILLS pale yelloiv, close, or subdistant at the outer extremity, equal 

 or a few shorter, narrowly adnate, seceding with age, broadest to- 

 ward front, often forked at the base, rarely elsewhere, interspaces 

 venose. STEM 4-8 cm. long, 1.5-2 cm. thick, white, flesh concolor 

 and unchanged, subequal, glabrous, even, spongy-stuffed. SPORES 

 ochraceoiis-yelloiD, subglobose, 8-9 micr. TASTE acrid in all its 

 parts, often very acrid. ODOR not noticeable. 



Solitary or scattered. On debris or forest mould in hemlock or 

 mixed woods of northern Michigan, in deciduous woods in the south- 

 ern part of the state. July, August and September. Earlier in 

 southern Michigan. Infrequent. 



