650 



THE AGARICACEAE OF MICHIGAN 



1. TRICHOLOMATA. Gills sinuate-adnexed ; stem fleshy, simi- 

 lar in substance to the pileus. 



690. Armillaria caligata Vitt.-Bres. 



Bynien. Em-op.. 1874. 



Illustrations: Bresadola, Fungh. mang. e. vel., PL 17. 

 Gillet. Champignons de France, Xo. 33. 

 Barla, Champignons de Nice, PL 10, Fig. 1-7. 

 Patouillard, Tab. Analyt.. No. 300. 

 Hard, Mushrooms, Fig. 12, p. 59 (as A. nardosmia Ell). 

 Van Hook, Ind. Acad. Sci. Proc, 1911, Fig. 1, p. 348 (as A. 



nardosmia). 

 Plate CXXXVII of this Report. 



PILEUS 0-10 cm. broad, firm, convex then expanded and de- 

 pressed, spotted by oppressed, rufous-brown or dark brown, elon- 

 gated fibrillose scales, elsewhere silky, white between scales or 

 brunescent, margin at first incurved and margined by remnants of 

 the veil. FLESH white, thick, compact. GILLS sinuate-adnate, 

 at length with decurrent tooth, medium broad (5-8 mm.), hetero- 

 phyllous, white, crowded, edge entire, trama of parallel hyphae. 

 STEM stout, 4-7 cm. long, 2-3 cm. thick, subequal or tapering down, 

 solid, sheathed at first to the middle or above it by the veil which 

 terminates above by an ample, flaring, tlrickish, membranous AN- 

 NTJLUS, later breaking below into subconcentric, rufous-brown 

 scales, white and rough-scurfy above the ring, then glabrous and 

 shining, white within. SPOKES spherical-ovoid to short elliptical, 

 6-7.5x5 mier., smooth, white in mass. BASIDIA 38-40x7-8 niicr.,. 

 4-spored. ODOR none. TASTE of nuts or slightly bitterish-acrid. 



Solitary or in caespitose pairs. On the ground, oak hillside 

 bordering a tamarack bog. Ann Arbor. October. Rare. 



Our plants agree so well with Bresadola's description and figure 

 of .1. caligata that I have no hesitancy in referring them there. 

 There is a slight discrepancy as to odor. Bresadola describes the 

 European plant with an agreeable, fruit-like odor. On this point our 

 specimens also differ from the description of A. nardosmia Ell. 

 Several correspondents from the eastern part of the United States 

 inform me thai their specimens of A. nardosmia often or always 

 lack the odor of almonds attributed to it. Peck (Rep. 33) first 

 referred the New York species to A. rhagadisma Fi\, but in the 



