62S 



THE AGARICACEAE OF MICHIGAN 



(g) Annulus persistent; stem slender, about 1 mm. thick, 



blackish-brown. L. gracilis Pk. 

 (gg) Annulus evanescent or obscure. 



(h) Pileus 4-8 cm. broad, patches tawny-olive; stem 



stout; spores attached at basal angle. L. caloceps 



Atk. 



(hh) Pileus dark-brown, usually less than 4 cm. broad. 



(i) Spores minute, 4x2 micr.; veil forming a dense, 



brown tomentum on stem. L. eriophora Pk. 

 (ii) Spores larger, 6-8 x 4-5 micr.; veil of more deli- 

 cate and loose floccose filaments. 669. L. felina 

 Fr. 

 (cc) Stem without evident sheath,, but provided either with an 

 evanescent or a persistent annulus. (See ccc.) 

 (d) Spores 9 micr. or more in length, 

 (e) Pileus moderately large, with red appressed scales; annu- 

 lus persistent. 681. L. rubrotincta Pk. 

 (ee) Pileus small, minutely squamulose; annulus evanescent; 

 base of stem mycelioid, forming a "sand-bulb." L. areni- 

 cola Pk. 

 (dd) Spores less than 9 micr. long, 

 (e) Pileus rather small, 1.5-4 cm. broad, with reddish-brown 

 scales on a white surface; spores attached at basal angle; 

 with a marked odor. 682. L. cristata Fr. 

 (ee) Pileus white, small, minutely fibrillose-squamulose; spores 

 minute; annulus thin and fragile. 684. L. miamensis 

 Morg. 

 (eee) Pileus with minute pale-yellow hairy scales. 683. L. 

 alluviinus Pk. 

 (ccc) Stem clothed or peronate with squamulose, granular, fur- 

 furaceous, or minutely warty scales; pileus granular, 

 warty or furfuraceous. 

 (d) Gills adnate. 

 (e) Pileus distinctly rugose on disk, 

 (f) Plant growing on rotten logs, stumps, etc., large; the 

 sheath membranous-margined above. 674. L. granosa 

 Morg. 

 (ff) Plant growing on the ground or on leaf -mould,, small; 

 the floccose-scaly sheath not margined above. 675. L. 

 rugoso-reticulata Lorin. 

 (ee) Pileus not rugose, 

 (f) Stem long, slender; pileus often umbonate. L. amian- 



thina Fr. 

 (ff) Stem short, stouter; pileus not umbonate. 676. L. ad- 

 natifolia Pk. 

 (dd) Gills adnexed or emarginate. 

 (e) Growing on rotten wood; color whitish to pale tawny. 



678. L. pulveracea Pk. 

 (ee) On the ground; color rusty-yellowish. 677. L. granulosa 



Fr. 

 (eee) Like preceding but whitish throughout. 677. L. granu- 

 losa var. albicla. 

 (ddd) Gills free; plants quite small; soft, fragile. 



(e) Pileus dingy-white, or brownish. 679. L. pusillomyces 



Pk. 

 (ee) Pileus white, disk pinkish. 685. L. cristatatellus Pk. 



