ISSN:0027-5514    

DOI:10.1080/00275514.1937.12017234

出版商:Taylor&Francis    

年代:1937

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1937.12017235

出版商:Taylor&Francis    

年代:1937

数据来源: Taylor

摘要:

SUMMARYA new genus and species of fungus,Uredinella coccidiophaga, intermediate between the rusts andSeptobasidiumis described. The fungus produces a small, discoid, compact, annual growth which covers and is nourished by one scale insect, forming within the insect's body haustoria of theSeptobasidiumtype. After producing spores in the spring, the fungus dies. Brown, thick-walled teleutospores are formed which in nuclear behavior, and external structure strikingly resemble the teleutospores of certain rusts. The basidia are four-celled and each cell is uninucleate at first. Before the spores are formed, nuclear division occurs in each cell. One nucleus goes into each spore and one remains with some cytoplasm in each sterigma. In water, the spores each produce a sterigma and another spore, the nuclear behavior in the basidial cells being repeated. In addition to the teleutospore, another type of spore is formed. This resembles the teleutospore in color and wall structure and resembles some of the teleutospores in being cylindrical in shape. It differs from the teleutospores in being binucleate and in producing a long, bent-elliptic, binucleate spore. The latter is regarded as a uredospore and the spore that bears it as a uredospore mother cell.

ISSN:0027-5514    

DOI:10.1080/00275514.1937.12017236

出版商:Taylor&Francis    

年代:1937

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1937.12017237

出版商:Taylor&Francis    

年代:1937

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1937.12017238

出版商:Taylor&Francis    

年代:1937

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1937.12017239

出版商:Taylor&Francis    

年代:1937

数据来源: Taylor

摘要:

SUMMARYSpecific limits in the Thelephoraceae are not always clear and the characterization of the simpler species is often inexact. Published descriptions are frequently inadequate and many of the distinguishing features stressed are found to be inconstant. On account of this confusion it was thought that cultural studies in this group might provide additional criteria for the delimitation of the simpler species.Sets of monosporous cultures were obtained from a range of specimens included in the variable speciesCorticium coronillav. Höhn.&Lits. Among these cultures four totally distinct cultural groups could be recognized. These groups differed from each other in general growth, presence or absence of asexual reproductive structures, ability to produce basidia in culture and type of heterothallism. The specimens associated with each of the four groups were uniform and minute consistent morphological differences occurred between the members of the different groups. The fundamental differences between these groups can only indicate that they represent distinct species.A study of additional specimens and cultures indicated that a further study would disclose many other groups in addition to the four described. In view of the very complex nature of the species it was considered best to include all the four types in the collective speciesCorticium coronillav. Höhn.&Lit. It should, however, be realised that this is genetically a very complex entity.

ISSN:0027-5514    

DOI:10.1080/00275514.1937.12017240

出版商:Taylor&Francis    

年代:1937

数据来源: Taylor

摘要:

SummaryA species ofLeptosphaeriahere described asL. Opuntiaeis associated withHendersonia OpuntiaeEllis&Ev. on segments ofO. Lindheimerifrom Texas collected by Wolf and deposited in The New York Botanical Garden. A specimen labeled“Hendersonia OpuntiaeE.&E.”from Alabama in the Ellis Herbarium also shows numbers of ascocarps of the sameLeptosphaeria. The ascocarpic and pycnidial fruit bodies develop clypeate buffer tissue about the ostiolar region. Ascospores and conidia are brown and 3-septate. The association and similarities in morphology suggest that possibly these two forms belong to the same fungus. The connection would have to be proved by culture work.The perithecial cavity develops largely through the differential growth of the peripheral tissues as a wall while the cells at the center elongate vertically by adding intercalary cells so that one sees streamers of hyphae extending across the cavity and attached to the wall cells above and below. Ascogenous elements arise from the fertile tissue at the base and grow up between the disorganizing vertically growing space-making hyphae. These ascogenous elements do not arise from the lower ends of free swinging vertically downward growing hyphae as claimed forSporormia leporineby Arnold. Otherwise cavity formation in thisLeptosphaeriaand theSporormiaseems to be identical.The writer is indebted to Mr. Frank Paladino for the preparation of slides from herbarium material for this study.

ISSN:0027-5514    

DOI:10.1080/00275514.1937.12017241

出版商:Taylor&Francis    

年代:1937

数据来源: Taylor

摘要:

SUMMARYAfter exchanging descriptions, photographs, dried specimens and in one case fresh specimens, the writers propose the following synonyms.1.Collybia myriadophylla(Peck) Sacc.Collybia lilacea Quélet)2.Omphalia gracilisQuélet (=Mycena immaculata(Peck) Sacc.)3.Omphalia marginella(Pers.) Joss.&Maire (=Omphalia rugosodiscaPeck) If one prefers to conserve a name by which to designate the American form with nonbordered gill edges, the combinationO.marginella(Pers.) Joss.&Maire var.rugosodisca(Peck) Smith&Joss, should be used.4.Panellus mitis(Pers.) Singer (=Panus bacillisporusKauff.)5.Pholiota albocrenulataPeck (=Pholiota fuscaQuélet)

ISSN:0027-5514    

DOI:10.1080/00275514.1937.12017242

出版商:Taylor&Francis    

年代:1937

数据来源: Taylor

摘要:

SUMMARYOn specimens ofCoryneum microstictumon cankered rose canes from Oregon the conidia measured essentially the same as those on rose from the eastern part of the United States; those from Canada and England were somewhat smaller. Composite measurements of conidia from all these sources (10.8-23μ×4.6-9μ) accord well with those previously published by others for this species on rose, which are also variable.Culturally the fungus from Oregon resembled that from eastern United States, although it was separable in color. It was also similar to an authentic culture of C.microstictumvar.Mali.These three cultures produced a noticeably less restricted growth than two cultures ofC. Beyerinckiifrom different sources (Oregon and Europe) included in the same comparison, and also shown to be separable from each other.In culture conidia ofC. microstictumfrom Oregon were often larger than those direct from the cankers, and some were much longer with as many as seven cells. They were similar to the conidia from the other culture of this species from eastern United States.Conidia of the two cultures ofC. Beyerinckiidiffered from each other. In the one from Oregon they were few-celled and relatively shorter, whereas in the one from Europe they were usually longer and sometimes contained as many as seven cells.

ISSN:0027-5514    

DOI:10.1080/00275514.1937.12017243

出版商:Taylor&Francis    

年代:1937

数据来源: Taylor