7.56 THE AGARICACEAE OF MICHIGAN 



length raised, obtuse to subdepressed, slightly rugose on disk, rare- 

 ly even, glabrous, subhygrophanous, yellowish-white, tiuged with 

 red, more deeply colored on disk, margin often slightly striate when 

 moist. FLESH thin, watery-white when moist. GILLS adnexed 

 or nearly free, rather crowded, medium width, white or whitish, 

 edge minutely fimbriate. STEM 2-5 cm. long, 3-6 mm. thick, strict, 

 equal, hollow, terete or subcompressed, sometimes twisted, even, 

 glabrous, pruinose at apex, white to pellucid, white-mycelioid 

 or strigose at base. SPORES narrowly elliptic-ovate, 6.5-8x3-3.5 

 micr., pointed at one end, smooth, white in mass. CYSTIDIA none; 

 sterile cells on edge of gills short and slender. ODOR and TASTE 

 mild. 



Gregarious or scattered. Low, moist, rich frondose woods ; on tht 

 ground or among mosses. Ann Arbor and New Richmond. Prob- 

 ably throughout the State. September-October. Infrequent. 



The straight, pellucid-white stem and rugose cap distinguish it. 

 Luxuriant specimens have rugose lines over the whole surface of 

 the cap. The colors are rather clear compared with those of C. 

 dryophila and C. biityracea. Peck compares it with C. maculata, 

 from which it is easily distinct. C. estensis Morg. (Cinn. Soc. of 

 Nat. Hist. Journ., Vol. 6, 1883, Plate 5) is very close, and may be 

 a variety. 



801. Collybia alcalinolens Pk. 



N. Y. State Mus. Rep. 49. 1896. 

 Illustration : Plate CLXII of this Report. 



PILEUS 1-2.5 cm. broad, at first ovate with incurved margin, 

 hygrophanous, glabrous, grayish-umber (moist), grayish-brown or 

 cinereous (dry), margin striatulate when moist. FLESH thin, 

 whitish or grayish-tinged. GILLS sinuate-adnexed or emarginate, 

 rather broad, subdistant, subventrieose. white then obscurely gray- 

 ish-tinged, edge entire. STEM 3-5 cm. long, 2-4 mm. thick, rarely 

 thicker, equal, subpruinose, glabrescent. shining even, flexuous, 

 stuffed then hollow, cartilaginous, elastic, whitish. SPORES ob- 

 long-ovate, narrow, 7-10 x 4 micr., smooth, white. CYSTIDIA and 

 sterile cells lacking. BASIDIA about 27x5-6 micr., 4-spored. 

 ODOR strong, alkaline. TASTE mild. 



Gregarious or sub.aespitose. On the ground among leaves, rich 

 frondose woods. Ann Arbor. October-November. Frequent 

 locally. 



