SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Physarum mennegae nov. spec. maxime ut Ph. penetrale Martin, sed sporangiis subglobosis, non distincte elongatis, stipite luteolo, non rubro, concretionibus calcareis albis, non luteis, capillitio minus denso et non persistente, sporis majoribus ab eo recedens; typus: 945 in collectione auctoris, lectus a Dr. A. M. W. Mennega in Guiana Batavorum Centrali. Sporangia gregaria, stipitata, e hypothallo orbiculari parvo orientia, altitudine 1 mm non excedentia. Hypothallus decolor, translucens. Stipes sporangio fere aequilongus vel eo paulo longior, fragilis, pallide luteolus, translucens, lucem orientem versus visus luteus, interdum paulo in sporangii cavitatem productus. Sporangium subglobosum, circ. 0.5 mm diam., brunneum; peridium sine concretionibus...

Ano: 1960

URL: http://www.repository.naturalis.nl/record/534975

Notes on Myxomycetes VI

This is the second paper dealing with Myxomycetes collected by me in the Netherlands, mostly in the neighbourhood of Doorwerth. Specimens of the species dealt with are preserved either in my private collection or in that of the Botanical Museum and Herbarium of the State University, Utrecht (in the last named case the numbers are followed by a “U”), or in both.

Notes on Myxomycetes V. On the identity of the genera Cribraria and Dictydium

Ano: 1962

URL: http://www.repository.naturalis.nl/record/534879

The genus Dictydium was created by SCHRADER (1797) for Cribrarialike forms lacking a cup. ROSTAFINSKI (1875) gave it its modern definition: i.e. having meridional costae which are joined at frequent intervals by fine, more or less parallel threads. He further created a genus Heterodictyon for a species (H. mirabile) which has ribs in the lower part and a Cribraria-like net in the upper. Massee in his monograph (1892) transferred Heterodictyon to Cribraria (C. mirabilis Mass.), pointing out that there is “every shade of transition between the two extremes,” and that Heterodictyon bienaszii Racib. i.e. ( Cribraria macrocarpa of the later monographs) “closely connects the genus Cribraria in the wider sense with Dictydium.” Jahn in 1901 described a variety...

Notes on Myxomycetes VIII, a new species of Didymium from the Netherlands

Ano: 1962

URL: http://www.repository.naturalis.nl/record/535132

Specimens of a Didymium collected at Endegeest near Oegstgeest, a suburb of Leiden, on holly leaves, were put aside by Prof. Dr. W. K. H. Karstens as being near to Didymium squamulosum (Alb. & Schw.) Fries, but not identical with it. Some of the specimens were collected in August 1944 by Dr. S. J. van Ooststroom, whereas several other ones were collected in October of the following year by Prof. Karstens at the same locality; they are all very similar, and remarkable in the smooth white calcareous crust, which is distant from the membranous inner part of the peridium, and in the rather dark spores, which are nearly all encircled by a thin, sometimes fragmentary ridge. Comparison with a large number of specimens of D. squamulosum has convinced me that...

Ano: 1964

URL: http://www.repository.naturalis.nl/record/534904

Notes on Myxomycetes VII

As in my previous papers dealing with Myxomycetes collected by me in the Netherlands, here too the specimens dealt with are preserved either in my private collection, in that of the Botanical Museum and Herbarium of the State University, Utrecht (in the last-mentioned case the numbers are followed by a “U”), or in both. I am much indebted to Prof. Dr. G. W. Martin for sending me valuable specimens, and for his help, to the British Museum for the facilities accorded to me for studying its Myxomycete collections, and to Dr. R. Santesson of the Institute of Systematic Botany of the University of Uppsala for advice and the loan of valuable specimens.

An annotated list of Myxomycetes found in the Netherlands. Additions and emendations I

Ano: 1964

URL: http://www.repository.naturalis.nl/record/534919

The following species and varieties were either found after my list of Myxomycetes from the Netherlands was published (Acta Bot. Neerl. 10: 80-98. 1961) or they are recorded because further study has convinced me of their vallidity of which I was doubtful at first. There was now no need to mark species that are not on Dr. Karstens’ unpublished list, as was done in my previous paper, as these are all new records for the Netherlands.

An annotated List of Myxomycetes found in the Netherlands. Additions and Emendations II

Ano: 1962

URL: http://www.repository.naturalis.nl/record/534717

Since the first “Additions and Emendations” (Acta Bot. Neerl. 11: 35-36, 1962) to my “List of Myxomycetes collected in the Netherlands” (Acta Bot. Neerl. 10: 80-98, 1961) were published, further study and collecting have necessitated some more changes.

An annotated list of Myxomycetes found in the Netherlands, mostly in the Vicinity of Doorwerth

Ano: 1964

URL: http://www.repository.naturalis.nl/record/534783

Since the publication of Dr. T. BROEKSMIT’s paper on Myxomycetes, which includes a list of the representatives of this group then known from the Netherlands (Ned. Kruidk. Arch., 1923: 315-327), and of that by A. M. SCHOLTE (ibid., 1926: 155-162), only a few new finds have been reported. In July 1953 Dr. W. K. H. Karstens kindly sent me an unpublished list of all the species of which he had seen specimens from the Netherlands; it comprised practically all finds that had been made up to that date, those of myself included. In total 130 species and varieties were enumerated, and of each of them the number of specimens seen by him was recorded. A few of those mentioned by Dr. Broeksmit, viz. Badhamia nitens, Physarum conglomeratum, Diderma radiatum, Didymium...

Notes on Myxomycetes II. A new Didymium, a new Physarum and a new variety of Badhamia Lilacina (Fr.) Rost

Ano: 1960

URL: http://www.repository.naturalis.nl/record/535217

1. Didymium ovoideum nov. spec. maxine ut D. iridis (Ditmar) Fries, sed a specie illa sporangiis plerumque prolatis, peridio fragili et translucente, primum crystallorum calcis glomerulis albis aspersis, sed crystallorum glomerulis detritis ob colorem sporarum olicaveis, columella plerumque etiam prolata, sporis minoribus distinguenda (cf. Fig. 1). Sporangia (Fig. 1, a) gregaria, stipitata, stipite incluso 1.0-1.5 mm alta, parte sporifera plerumque prolata, 0.4—0.5 mm diam, et 0.8-1.0 mm alta, rarius globosa casu quo diametrum eundem exhibente, basi umbilicata, crystallorum calcis glomerulis albis aspersa; stipes rubrobrunneus, translucens, ad basin granulis aliensis cum substantia propria commixtis nigrescens, e hypothallo orbiculari parvo, dilute brunneo...

Notes on Myxomycetes IV. Myxomycetes collected in the Netherlands, chiefly in the Vicinity of Doorwerth (Gelderland)

Ano: 1959

URL: http://www.repository.naturalis.nl/record/535194

This is the first of a series of short papers dealing with Myxomycetes collected by me since August 1951 in the Netherlands, mostly in an area not exceeding 6 square kilometers in extent, situated round Doorwerth in the province of Gelderland, and extending from Heelsum in the West to Oosterbeek in the East, and from Wolfheze in the North to the banks of the Rhine in the South. Localities will only be mentioned by name when the specimens were collected outside this area, or when they appear to be rare here. Species which according to Prof. Dr. W. K. H. Karstens (private communication) have not been found previously in the Netherlands, have been marked with an asterisk. The (unpublished) list of Dr. Karstens, which covers the whole of the Netherlands,...

Notes on Myxomycetes I. Some remarks on the genus Reticularia Bull. Emend. Rost

Ano: 1960

URL: http://www.repository.naturalis.nl/record/534797

On account of the reticulate spores with their large area of dehiscence and because of the structure of the pseudo-capillitium the monotypic genus Liceopsis and Enteridium splendens (syn. E. rozeanum) are returned to Reticularia. It is argued that R.? rozeana can not with certainty be identified, but that it can not be regarded as conspecific either with R. lobata or with R. splendens. Of R. lycoperdon a var. americana is separated, differing from the type by its free spores. A new species, R. intermedia, is described. It resembles R. lycoperdon in the dendroid pseudo-capillitium, but differs from the latter in the fragile cortex and in the filamentous structure of the pseudo-capillitium. It is known so far only from the vicinity of Doorwerth, province of...