1"| ll\ iiuMiitiii>cfl:i', A;;ari(-'i\ocii), Lcucosporii', Russnla. 



nn. l:in» ; Mipcrficic (•ovintliio-nihrii, imitabili, centro deinuin tlave- 

 se«'nti tineta, visciila, «iitc vcrsiis inarginem separabili, glabra ; 

 niar^inc actatc bMiitcr striato-tnhcrcnlato ; contextn iu.proxiniitate 

 p«'llinilac rulM<». «•oft«'rnic glabro, lcnte acri, odore speciali nnllo: 

 lauH-llis (l«>innin llavis, :n'«inalibns, ad stipitem subfnrcatis, venoso- 

 «•«)nn«'xis, intns angnstis, extns latis et ventricosis, crassiuscnlis, 

 contcrtis ; stipitc albo, tirmo, snbaequali, 4 cm. longo 1,7 cm, cr.; 

 sporis ((«'liraccis, subolobosis, ccbinulatis, 8,7 * 7. 



Ilah. :i(l t«'rriun sabnlosam sub «inercnbus, castaneis etc, Cold 

 Si^rin^f Harbor, Long Island, New York, Amer. bor. (G. S. BuR- 



LlNRnAM). 



1 1. Riissula crenulata linrlingliam, Mj^cologia, 1913, p. 310. — Pileo 504 

 lato convexo, dein plano v. depresso, nsque ad 9 cm. circ. lato ; 

 stipcrticic albo-lactea v. tiavidula, uda viscida, pellicula facile sece- 

 «lenti, glabra ; margine tenui, demum leniter tnberculato-striato ; 

 contextn frajiili, albo, sapore acri ; himellis albis, aequalibus ad- 

 natis, planis, acie sub lente minute erosa v. crenata, non furcatis, 

 extus rotundatis, intns angnstatis, pruinosis, confertis; stipite albo, 

 spongioso, subaeqnali v. infra intlato, glabro, 10 cm. longo, 2 cm. 

 crasso; sporis albis, plerumque globosis, echiuulatis, 10[i,diam. 

 Hab. ad terram in silvis, Glen Brook Oregon, Amer. bor. (W. A. 



MrRRILL^. 



13. Russijla pulchra Ger. S. Burlingham, Mj^cologia 10., 1918, p. 95.— 505 

 Pileo convexo, centro e plano leniter depresso, usque 8 cm. lato; 

 snpcrticie in margine n o p a 1 - rnbra, in disco rubrococciuea v. 

 snbsauguinea, uda viscida, cute iu margine separabili dln pruiuosa 

 demuMi disco excepto areolata ; margine tnberculato-striato, invo- 

 Into ; coutextu albo miti odore peculiari uullo ; lamellis albis, ae 

 qualibus, margine integris, ad stipitem fnrcatis venoso-counexis, 

 ad margincm latioribns, aduatis, teuuibus, subdistantibus; stipite 

 albo, basi atteuuato, e spugnoso-farcto usque cavo, glabro, rugn- 

 loso, usque 7 cm. longo 2 cra. crasso ; sporis albo-cremeis, ex el- 

 lipsoideis ovoideis, echiuulatis, uniguttnlatis, 8,7-10*7,5. 



Hab. gregaria in palustribus, Stow Massachusetts Amer. bor. 

 (SiMOX Davts). — Rii.s.s. subvelutinae Pk , uncialis Pk. etc. proxima. 



16. Russula atroviolacea Burliugham, North Amer. Fl. IX, 4., p. 220 506 

 (191oj. — Pileo couvexo, dein plano et ceutro depresso, 4-9 cm. 

 lato ; superficie rubrosauguinea v. brunneo-diamiueo, uniformiter 

 colorata v. centro raro pallidiori, uda viscida, cuticola separabili, 

 glabra ; margine aequali, coutextu carnoso, solido, non fragili sed 



