162 Hymenomycet», Agaricaceee, Melanosporse, Psathyrella, 



— Pileo campanulato v. convexo, glabro, udo v. hygrophano, 

 griseolo-brunneo; lamellis ascendentibus v. subarcuatis, subdistan- 

 tibus, adnatis, in maturitate nigris; stipite gracili, sgepe elongato, 

 cavo, griseo-brunneo, apice albo-pruinoso; sporis oblongo-ellipticis, 

 13-15'A.6'A-7V,. 



Hdb. ad terram, in rejectamentis, California (Mc. Clatchie). 



— Pileus l'/3-2y^ cm. latus; stipes 5-10'/^ cm. longus, 1-2'/^ 

 mm. crassus. 



PSATHYRELLA Fr. — Syll. V, p. 1126, IX, p. 149, XI, p. 77. 



1. Psathyrella mlnuta P. Henn. Engl. Jahrb. XXIII, p. 652. — 461 

 Pileo tenui membranaceo, campanulato-explanato, cinereo-flave- 

 scenti, levi, glabro, margine substriato, 3 min. diam.; stipite te- 

 nuissimo, alto, levi, glabro, basi discoideo, 6-8 mm. longo, vix '/g 

 mm. crasso; lamellis rotundato-adnatis, latis, subventricosis, haud 

 confertis, e pallido purpurascentibus; sporis ellipsoideis, levibus, 

 subatropurpureis, 4 '/,-5 '/, ^ 3 '/j. 



Hab. in ligno in Togo Afr. occ, (Baumann). — P. disseminatm 

 et P. consimili affinis. 



2. Psathyrella debilis Peck, Bull. Torr. Bot. Cl. XXIII, 1896, p. 418. 462 



— Pileo membranaceo, campanulato, umbonato, umbonem versus 

 striato, subhyalino, aibido, demum griseolo; lamellis tenuibus, an- 

 gustis, confertis, adnatis, ex albido nigris; stipite graciU, debili, 

 ilexuoso, nunquam erecto, cavo, albo; sporis late ellipticis, 13 *:# 8. 



Hab. in truncis putridis, Kansas Amer. bor. (Bartholomew). 



— Pileus 1 '/j-3 '/2 c-m. latus ; stipes 5-8 cm. longus, 2-3 '/^ mm. 

 crassus. Statura Psathyrce gyroflexce. 



3. Psathyrella gracillima Peck, BuU. Torr. Bot. Cl. XXIII, 1896, 463 

 p. 417. — Pileo membranaceo, convexo v. subplano, demum di- 

 scum versus striato, caesio, disco luteo et plerumque compresso; 

 lamellis tenuibus, confertis, postice rotundatis, adnexis v. subhberis, 



in juventute dilute schistaceis, demum nigris; stipite gracili, elon- 

 gato, erecto, cavo, albido v. cremeo; sporis oblongo-ellipticis, 14- 

 16 « 6-8. 



Hab. in ligno humido, Kansas Amer. bor. (Barthoi-omew). — 

 Pileus 1 '/.,-4 cm. latus; stipes 8-13 cm. longus, fere 2 mm. cras- 

 sus. E vicinia PsathyrellcB hiascentis, Ps. trepidce, Ps. hydrophorce 

 etc, sed cum nuUa harum apte conjungenda. 



4. Psathyrella graveolens Sacc. Atti d. Soc. Ven. - Trent. di Sc. 4^4 

 Nat. 2 ser. 2 vol. 2 fasc. 1896, p. 26 extr. tab. I, %. 1 et Bull. 



