I 



CLASSIFICATION OF AGARICS 163 



pellicle continuous and entirely separable, margin hecoming 

 strongly tuberculate-.striate. >^LESH thin, white, not changing 

 color, soft. GILLS 'bright ochraceous-yellow (flavus, Sacc), white 

 at first, rather narrow, broadest in front, narrowed and adnexed 

 behind, subdistant at maturity, dusted by the spores. STEM 4-8 

 cm. long, 1-2 cm. thick, siihequal to ventricose, soft and fragile, 

 loosely stuffed then cavernous (but not from grubs), Avhite, rarely 

 tinged with delicate pink, slightly wrinkled, subglabrous. SPORES 

 subglobose. 7-9 micr., echinulate, nucleate, briglit ochre-j-ellow in 

 mass. TASTE mild. ODOR none. CYSTIDIA^ very few. Siih- 

 hl/meniini} uarrou', sharjdy differentiated from gill-trama. 



Solitary or scattered. In mixed woods "of hemlock and beech, 

 among beds of white pine needles at New Richmond; among grass, 

 etc., in oak woods at Ann Arbor. -luly-October. Frequent. 



This very fragile Russula is known from the other members of 

 the ''Fragiles" group by its medium size, bright yellow-ochraceous 

 spores and gills, the hollow, often subventricose stem, the mild taste 

 and the pinkish-yellow to peach-colored pileus. The stem is some- 

 times enlarged at the apex, sometimes at the base, always fragile. 

 Very few of our Russulas have such bright-colored spores and gills. 

 The color of the cap varies rather rarely to a deeper red on the one 

 hand or to ochraceous-tan and straw-color on the other. The flesh 

 does not change on bruising, and the odor is not noticeable even in 

 age. It is very different from R. Integra Fr. It approaches R. 

 nitida and is no doubt the plant usually referred to that species 

 in this country. It differs in the lack of the nauseous, disagreeable 

 odor which is known to be constant in R. nitida. I formerly refer- 

 red it to 7?-. harJac Quel, which, however, is described as compact 

 and firm. R. aiirata Fr. has gills with a chrome-yelloAv edge. 



Micro-chemical tests: G. (Flesh turns blue quickly; gills become 

 greenish-bine.) S Y. (Flesh and gills slowly pinkish then blue.) F 

 S. (Cystidia colored brown.) 



146. Russula roseipes Seer.— Bres. (Edible) 



Fung. Trid., Vol. I, 1881. 

 Illustration: Ibid, PL 40. 



PILEUS 2.5-5 cm. broad, thin, fragile, convex then piano-de- 

 pressed, with a viscid, separable pellicle, margin tubercular-striate 

 when mature, soon dry, rosy-red or flesh-red, disk tending to ochre- 

 yellowish. FLESH white, thin, unchanged. GILLS soon truly 



