60 THE AGARICACEAE OF MICHIGAN 



(m) Stem minutely pruinose, horny, almost 

 black below; pileus dark rose-madder. 39. 

 M. erythropus Fr. var. 

 (mm) Stem densely tomentose. 



(n) Stem dark reddish-brown throughout, 2-8 



cm. long, 35. M. semihirtipes Pk. 

 (nn) Stem brown or fawn color, 5-12 cm. 

 long. 47. M. elongatipes Pk. 

 (hh) Pubescence etc. of stem grayish or whitish, at 

 least when dry. 

 (i) Growing on tree-trunks, bark, stumps, logs, etc. 

 (k) Slender; pileus 1-1.5 cm. broad, papillate, dull 

 pinkish-white; on mossy logs. 48. M. papil- 

 latus Pk. 

 (kk) Short -stemmed; pileus 1-3 cm. broad, fulvous- 

 alutaceus; caespitose-gregarious. 31. M. fag- 

 ineus Morg. 

 (ii) Among fallen leaves, etc., in woods; stem 5-12 

 cm. long, 

 (k) Stem 2-5 mm. thick, reddish under the dense 

 whitish pubescence; gills very narrow and 

 crowded. (See S27 CollyMa confluens Fr.) 

 (kk) Stem 1-2 mm. thick; covered with grayish 

 pruinosity or tomentose. 



(I) Gills very narrow and crowded, whitish or 



grayish. 40. M. velutipes B. & C. 



(II) Gills distant, at length reddish-spotted. 47. 

 M. chordalis Fr. 



(bb) Stem inserted at the base, instititious, short; plants small, 

 (c) Gills attached to a collar, distant; pileus rufescent; stem 



white. 44. M. olneyi B. & C. 

 (cc) Gills attached to stem. 



(d) Pileus glabrous, rarely subpruinose. 



(e) Pileus milk-white, not sulcate nor plicate; gills distant; 



stem reddish-brown. 54. M. epiphyllus Fr. 

 (ee) Pileus rufescent, striate when dry; stem brownish to 

 blackish-brown. 50. M. felix Morg. 

 (dd) Pileus prukiose, chalk-white, stem black, white pruinose 

 on surface; spores angular. (See 56. Heliomyces nigripes 

 (Schw.) Morg.) 

 (ddd) Pileus hairv or strigose-hairy. 

 (e) On cedar twigs; pileus conic, papillate, dark tawny. (See 



830 CollyMa campanella Pk.) 

 (ee) On twigs, chips, acorns etc; pileus umbilicate; whitish 

 to dark grayish. (See 829 CollyMa stipitaria Fr.) 



(AA) Stem glabrous (except sometimes at the very base), 

 (a) Stem villose-rooting or attached by a floccose tubercle, 

 (b) Gills soon reddish-brown from the dark-colored cystidia; stems 

 usually coherent, bay-brown, densely white-hairy at base. 46 

 M. cohaerens (Fr.) Bres. 

 (bb) Gills white or slightly tinged. 



(c) Stem 4-8 cm. long; pileus sulcate, ochraceus-red; spores large. 



49. M. siccus Schw.= ( M. campanulatus Pk.) 

 (cc) Stem 2-5 cm. long. 



(d) Pileus, gills and apex of stem white, stem dark-brown below, 

 attached by a spreading mycelium. 34. M. delectans 

 Morg. 

 (dd) Pileus not white. 



(e) Stem reddish-brown to chestnut downwards; pileus dingy 



ochraceus. 33. M. glaoellus Pk. 

 (ee) Stem wine-purple or pink upwards; pileus tawny-brown 

 to purplish or pink. 33. M. oellipes Morg. 



