摘要:

SummaryThe foregoing paper discusses a minute perithecial Ascomycete found growing on softened culms ofJuncus militarisBigelow, submerged from a few inches to two or three feet in a small freshwater pond on Nashawena Island, southwest of Woods Hole, Massachusetts, in July and August of several summers from 1915 to 1927 and in a similar pond at French Watering Place on Naushon Island in August 1927.The morphology and reproduction of the fungus are considered, and the peculiarities in the structure, discharge, distribution, attachment and germination of the spores, in their conformity to the aquatic mode of life, are emphasized as especially noteworthy.Certain aspects of the present limited occurrence of the organism on this restricted substratum in these small ponds are touched upon, and the possible means by which it might spread to other similar pools in the region are noted.As the fungus, although quite distinctive, appears to be one as yet undescribed, it is established as a new genusLoramycesand speciesL. juncicola;the distinguishing characteristics and dimensions are given, and the possible relationships noted.

ISSN:0027-5514    

DOI:10.1080/00275514.1929.12016935

出版商:Taylor&Francis    

年代:1929

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1929.12016936

出版商:Taylor&Francis    

年代:1929

数据来源: Taylor

摘要:

SummaryA peridium is present in the uredinia ofMelampsora confluensandM. Lini, as well as inM. Medusaealready described (4).Intercalary (disjunctive) cells occur in all three species.Peridial and intercalary cells are sister cells.The peridium ofMelampsoramay be regarded as homologous with the uredinial peridia of the Pucciniastreae (5) andCronartium Comandrae(4).There is no peridium in the uredinium ofColeosporium Solidaginis.Attention is drawn to the close similarity between the method of spore formation byC. Solidaginisand by those rusts whose urediniospores occur singly; in both types the spore-initials arise as a succession of buds from the basal cells.Gratitude is expressed to Professor J. C. Arthur for determining the species ofMelampsoraonSalixand to Dr. A. W. Henry for supplying excellent material ofM. Linifrom cultures of this rust.

ISSN:0027-5514    

DOI:10.1080/00275514.1929.12016937

出版商:Taylor&Francis    

年代:1929

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1929.12016938

出版商:Taylor&Francis    

年代:1929

数据来源: Taylor

摘要:

SummaryInoculations with teliospores ofP. Caricis-ShepherdiaeonCarex lanuginosaandCarex aquatilisproduced pycnia and aecia onElaeagnus commutata, E. angustifolia, Lepargyraea argenteaandL. canadensis.Inoculations with aeciospores fromElaeagnus commutata, E. angustifolia, Lepargyraea argenteaandL. canadensisproduced uredinia and telia onCarex lanuginosaandCarex aquatilis.A few collections of teliospores ofP. Caricis-ShepherdiaeonCarex lanuginosaproduced pycnia onL. canadensisbut failed to produce aecia, though producing normal infection in the other shrubs named in the preceding paragraph. This may indicate biologic forms.Aecidium arctoumonElaeagnus angustifoliaandAecidium AlleniionElaeagnus commutata, Lepargyraea canadensisandL. argenteaare from these studies assigned toPuccinia Caricis-Shepherdiae.The writers wish to acknowledge the aid of Mrs. Bernhard Nebel (néeMabel L. Ruttle) in making field observations and in culture work in the greenhouse. They also wish to gratefully acknowledge the courtesy of Mr. House of the New York State Museum, Dr. J. J. Davis and Dr. Dearness for supplying material as mentioned in the paper.

ISSN:0027-5514    

DOI:10.1080/00275514.1929.12016939

出版商:Taylor&Francis    

年代:1929

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1929.12016940

出版商:Taylor&Francis    

年代:1929

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1929.12016941

出版商:Taylor&Francis    

年代:1929

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1929.12016942

出版商:Taylor&Francis    

年代:1929

数据来源: Taylor