MyxomycetBe, Myxoinycotaccse, Chondrioderraa. 799 



riis, ovoideis v. globulosis, rubidis v. pallide flavis, irregulariter 

 dehiscentibus ; tunica exteriore plus v. minus calcifera, basi in cu- 

 pulaj formam persistente, tunica interiore tenuissima vix visibili; 

 stipite longo striato, rufo; liypothailo distincto sinuoso, plus vel 

 minus continuo; capillitio copioso pallido v. albo, nodulis calcareis 

 latis flavidis insperso; gleba nigra; sporis atro-brunneis, echinu- 

 latis, 13-15 [X. diam. 



Hah. in foliis et fragmentis putrescentibus in America bor. 



CHONDRIODERMA Rost. - Syli. VII p. 362, X p. 85, XI p. 464, 

 XIV p. 834, XVI p. 822, XVIII p. 210. 



1. Chondrioderma roanense Rex, Proc. Philad. Acad. (1893) p. 368, 6016 

 Torr. Myx. p. 167. — Plasmodio?; peridiis sparsis, disciformibus 



V. leviter convexis, saepe infra umbilicatis, saturate brunneis, 1 

 mm. diam. ; tunica externa levi, fragili, irregulariter fatiscente, 

 interiore alba punctata, stipite curto, nigro-piceo, longitudinaliter 

 sulcato; hypothallo nullo; columella disciformi, pallide ochracea, 

 capillitii floccis paucis subincoloribus, flexuosis, simplicibus v. fur- 

 catis, subinde anastomoticis: sporis atro-violaceis, verrucosis, 12- 

 14 *^. diam. 



Hdb. in lignis putrescentibus in America boreali. 



2. Chondrioderma rugosum Rex. Proc. Philad. Acad. (1893) p. 369, 6017 

 Torr. Myx. pag. 168, t. V, f. 26. — Plasmodio cinereo; peridiis 

 sparsis v. aggregatis, 0,5-0,6 mm. diam., albis v. griseis, superfieie 

 tota rugulis decussatis et areolas 25-30 polyhedricas formantibus 

 percursa; tunica simplici granulis calcareis plus v. minus referta; 

 stipite subulato, nigricante, peridium subaequante; hypothallo nullo; 

 columella elata, alba, globulosa; capiliitii floccis albis v. incolori- 

 bus, fureatis v. anastomotico-reticulatis ; sporis brunneo-violaceis, 

 8-10 [x. diam. 



Hah. ad Muscos in Amer. bor. et insul. Autillis. 



3. Chondrioderma montanum Meylan, BuII. Soc. bot. Geneve (1910) 6018 

 p. 262. — Plasmodio ? ; sporangiis stipitatis, raro sessilibus, albis 



V. roseis, 1 mm. lat. ; peridio duplici ; cute externa fragili, calca- 

 rea; cuticula interna membranacea, ab externa separabili; stipite 

 flavo-brunneo 0,6 mm. alto; columella sphLerica, magna v. parva, 

 brunnea subinde rufo-brunnea, raro palUda; capillitii tubulis pau- 

 cis, ramosis, non flexuosis, brunneo-violaceis; sporis globosis, 7-9 

 ^, diam., brunneo-purpureis, levissime spinulosis. 



