ISSN:0027-5514    

DOI:10.1080/00275514.1941.12020840

出版商:Taylor&Francis    

年代:1941

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1941.12020841

出版商:Taylor&Francis    

年代:1941

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1941.12020842

出版商:Taylor&Francis    

年代:1941

数据来源: Taylor

摘要:

SUMMARYIn the preceding account one new variety,Marasmius candidusvar.setulosus, is described, andCantharellus multiplexhas been reëstablished as a species distinct fromC. clavatus.The following contributions to synonymy have been made:1.Flammula scamba(Fries) Sacc. (=Naucoria caespitosaMurr.)2.Hebeloma sarcophyllumPeck (=Hebeloma porphyrosporumMaire)3.Marasmius candidus Fries(=Marasmius magnisporusMurr.)4.Marasmius chordalisFries (=Marasmius limonisporaKauff.)5.Pholiota erinacea(Fries) Quél (=Naucoria badiaMurr.)6.Psathyrella hydrophila(Fries) Smith (=Hypholmna californicumEarle).

ISSN:0027-5514    

DOI:10.1080/00275514.1941.12020843

出版商:Taylor&Francis    

年代:1941

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1941.12020844

出版商:Taylor&Francis    

年代:1941

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1941.12020845

出版商:Taylor&Francis    

年代:1941

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1941.12020846

出版商:Taylor&Francis    

年代:1941

数据来源: Taylor

摘要:

SUMMARYThe developmental cycle of a fungus commonly known asPiggotia Fraxinihas been studied. The fungus attacks various species of ash throughout the United States and is especially common in forest-tree nurseries.The pathogen is polymorphic, possessing a conidial stage, properly identified asMarssonia FraxiniEllis&Davis, a spermogonial and carpogonial stage, commonly designatedPiggotia FraxiniBerk.&Curt., and a perithecial stage, herein assigned toMycosphaerella effigurata(Schw.) House. Evidence of a genetic connection of these stages is presented and an emended description of the fungus is included.The pathogen is commonly associated in nature with such other species asMycosphaerella fraxinicola(Schw.) House,Sphaerella fraxineaPeck,Cylindrosporium Fraxini(Ellis&Kellerm.) Ellis&Ev.,Gloeosporium punctiformeEllis&Ev., andCylindrosporium viridisEllis&Ev.

ISSN:0027-5514    

DOI:10.1080/00275514.1941.12020847

出版商:Taylor&Francis    

年代:1941

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1941.12020848

出版商:Taylor&Francis    

年代:1941

数据来源: Taylor

摘要:

SUMMARYFurther evidence is presented thatUstilago AvenaeandU. perennanswill hybridize.Crosses betweenUstilago AvenaeandU. perennanswere made which involved four sorus characters, namely, covered, naked, powdery, and indurate.The naked and powdery characters were found to be dominant over covered and indurate, respectively.Independent inheritance of these characters is indicated by the fact that naked powdery, naked indurate, covered powdery, and covered indurate segregates were produced in the F2generation. These segregates broke up in the F3generation as follows: the naked powdery segregate gave rise to all four of the above-mentioned segregates; the naked indurate segregate produced naked indurate and covered indurate types; the covered powdery segregate produced covered powdery and covered indurate types; and the covered indurate segregate proved to be doubly homozygous in yielding only the covered indurate type of sorus. In crosses ofU. perennanswith a race ofU. Avenaehaving normal powdery sori, only the covered vs. the naked sorus characters were studied. Again it was found that the naked sorus character is dominant over the covered sorus character.The susceptibility of cultivated oats toUstilago perennanswas demonstrated, but tall oatgrass has not been found to be susceptible toU. Avenaenor to the hybrids between these two smuts.ThatUstilago AvenaeandU. perennansare synonymous is indicated by the morphological identity of their chlamydospores, their genetic relationship, and host range.A consolidated species would, by priority, be designated asUstilago Avenae(Pers.) Jensen.

ISSN:0027-5514    

DOI:10.1080/00275514.1941.12020849

出版商:Taylor&Francis    

年代:1941

数据来源: Taylor