HymenomycetsB, Agaricacese, Melanosporse, Psathyrella. 163 



Soc. Myc. de Fr. 1896, p. 76. — Pileo convexo, expanso, obtuse 

 xiinbonato, atro-f usco, sericeo-atomato ; lamellis sat confertis, latiu- ' 

 -scuie lanceolatis, sinuatis, nigricantibus; stipite gracili, cylindrico, 

 glabro, fusco; basidiis ovato-clavatis, curtis, 12-16 >^ 5-6, apice ste- 

 rigmata quaterna, brevia gerentibus; sporis ovoideis v. ovoideb- 

 oblongis, B-6 « 2, brunneis; cystidiis ovoideis basidio brevioribus. 

 Hab. ad humum in calidariis horti botan. Patavini, Italia. — 

 Pilei superficies ex cellulis amplis, globosis, prominentibus atomata. 

 Odore gravi fere Hydnorum nec non sporarum exiguitate a ce- 

 teris affinibus differt. Species forte exotica. 



5. Psathyrella leucostigma Peck, Bull. Torr. Bot. Club. 1895, p. 490. 465 



— Pileo submembranaceo, campanulato, striato, udo caesio-albo, 

 sicco spadiceo, sed apice albido; lamellis confertis, ex alutaceo ni- 

 gris, acie albida; stipite gracili, flexuoso, cavo, albo; sporis nigris, 

 ellipticis, 13-16 * 8. 



Hah. ad terram udam umbrosam, Kansas Amer. bor. (Bartho- 

 LOMEw). — Pileus 9-14 mm. latus; stipes 2-4 cm. longus, 2 mm. 

 crassus. 



6. Psathyrella BartholomaBi Peck, Bull. Torr. Bot. Club. 1895, p. 490. 46e 



— Pileo tenui, subconico v. convexo, glabro, marginem versus 

 striato, pallide brunneo ; lamellis confertis, subplanis, adnatis, e 

 brunneolo nigris ; stipite gracili, fiexuoso, cavo, fibrillis paucis gri- 

 iseolis ornato, pallide brunneo; sporis ellipticis, 10-13>» 5-6 y,. 



Hah. ad terram umbrosam, Kansas Amer. bor. (Baetholomew). 



— Pileus 1 y^-3 cm. iatus; stipes 2 y^-^ cm, iongus, 2 mm. crassus. 



7. Psathyrella hirta Peck, 50 Rep. p. 107, (1897). — Pileo tenui, 467 

 liemispliaerico, initio pilis erectis v. patentibus, fasciculatis, facile 

 detersibiiibus prsedito, liygropliano, udo brunneo v. rubro-brunneo, 

 leviter striato, sicco griseo-brunneo v. albido, carne subconcoiore; 

 lamellis latis subconfertis, adnatis, dente documenti ssepe auctis, 

 pailidis demum nigricanti-brunneis v. nigris ; stipite flexuoso, squa- 

 moso, cavo, nitido, albo; sporis eliipsoideis, nigris, 12-14 =«< 6-7. 



Hoh. subcgespitosa ad terram stercoratam umbrosam, Adiron- 

 dack Mount. Amer. bor. — Pileus 8-1 2 mm. lat. ; stipes 2,7-5 cm. 

 long., 2-3 mm. cr. 



8. Psathyrella Clementsii Sacc. et Syd. Sic nominanda est PsatliyreUa 

 sulcata Clem.-Sacc. Syll. XI, p. 78, ob liomonymam Ps. sulcatam 

 Dun. 



