,,-_, THE AGARICACEAE OF MICHIGAN 



says ii has the odor of stale olives, while Maire (Soc. Mye. France, 

 Bull. 27, p. 404) reports a slight dextrine odor. 



692. Armillaria focalis Fr. var. 



Epicrisis, 1830-38. 



Illustration: Cooke, 111., PL 245. 



Tl LETTS 3-0 cm. broad, eainpannlate-convex, soft-fleshy, obtuse, 

 even, glabrous, provided with a thin, separable, viscid cuticle, bright 

 brick-red. FLESH thin, tinged pink. GILLS sinuate-adnexed, 

 rather broad, about 5 mm., ventricose, soft, close, white or tinged 

 brick-red, edge thin. STEM 4-11 cm. long, 5-8 mm. thick, rather 

 slender, snbequal, attenuated below, soft solid, fragile, covered by 

 brick-red, floccose scales up to the evanescent, median annulus, 

 whitish and silky-shining above. SPORES globose, 3-4.5 micr., 

 white, smooth; basidia 4-spored, slender, about 24 micr. long. 

 CELLS of the gill-trama large, 75-125 micr. long, about 12 micr. 

 wide, divergent. Cells of the cuticle of pileus long, narrow, 5-0 

 micr. wide, gelatinous. ODOR and TASTE farinaceous. 



Gregarious or solitary, on the ground, in mixed hemlock and 

 maple woods, clay ravines. New Richmond. September. Rare. 



This plant seems to be intermediate between A. focalis and A. 

 aurantia. Its pileus is somewhat viscid and in this respect differs 

 from .1. focalis and is related to A. aurantia. Its spores also ap- 

 proach those of A. aurantia. In stature, texture of the flesh, char- 

 acter of pileus, etc., it is, however, quite different from A. aurantia. 

 The soft texture is given as an important character of A. focalis, 

 and Cooke's illustration gives a good idea of the coloring and the 

 appearance of the stem of our plants, except that the stein is much 

 more elongated and attenuated downward. No critical studies of 

 A. focalis Fr. could be found, and it is possible that its cap may be 

 provided with a viscid pellicle in wet weather. 



