696 THE AGARICACEAE OF MICHIGAN 



732. Tricholoma terreum Fr. (Edible) 



Epicrisis, 1830. 



Illustrations : Hard, Mushrooms, Fig. 55, p. TO, 190S. 

 Swanton, Fungi, PL S, Fig. 9. 

 Michael, Fiihrer f. Pilzfreunde, Vol. II, No. ill'. 

 Bresadola, Fuugh. mang. e. vel., PI. 24. 

 Patouillard, Tab. Analyt, No. 307. 

 Ricken, Blatterpilze, PI. 92, Fig. 4. 

 Gillet, Champignons de France, No. 704. 

 Cooke, 111., PI. 50. 



Peck, N. Y. State Mus. Mem. 4, PI. 45, 1900 (as var. fragrans I . 

 Plate CXLIX of this Report. 



PILEUS 2.5-0 cm. broad, thin, convex-eampannlate or nearly 

 plane, dry, subumbonate, gray, grayish-brown or mouse-color, in- 

 nately fibrillose to fibrillose-floccose and at length scaly, not striate. 

 FLESH white, cinerascent or gray near surface of pileus, thin. 

 GILLS adnate, then emarginate and uncinate, close but distinct, 

 white, pale ashy or cinerascent, sometimes yellowish-stained, medi- 

 um broad, edge entire. STEM 2.5-4 cm. long, 4-8 mm. thick, equal, 

 straight or slightly curved, solid or persistently fibrous-stuffed, 

 readily splitting lengthwise, white, whitish or cinerascent. subrigid, 

 fragile. SPORES minute, nucleate, narrowly oblong-ovate. ."> x 3, 

 smooth. CYSTIDIA none, sterile cells short or lacking. ODOR 

 and TASTE farinaceous, especially when plant is crushed. 



Gregarious or subcaespitose. On the ground in grassy places in 

 frondose woods, thickets, etc. Ann Arbor, Detroit, New Richmond. 

 August-November. Rather frequent about Ann Arbor. 



After reading the descriptions and remarks of a dozen waiters 

 concerning this species and related ones such as T. scalpturatwm 

 Fr. and T. squarrulosum Bres., and adding one's own observations, 

 it becomes clear that we have here a series of many forms which 

 run so close into each other that the amateur will hardly be able 

 to diagnose them satisfactorily in most cases. This fact is already 

 recognized by the number of varieties which have been described 

 both under T. terreum and T. scalpturatwm. The above descrip- 

 tion applies to the plants which have been found in frondose woods 

 of southern Michigan. Variations will be found in which the pileus 

 is more densely scaly with almost blackish scales on center, and 

 others where the color is pale silvery -gray. The color of flesh and 



