Februari 2001
3-11
Enkele nieuwe heterobasidiomyceten voor Vlaanderen
Karel Van de Put
Some Heterobasidiomycetes, new for Flanders (northern Belgium) are described and illustrated.
Three unnamed collections of an Achroomyces sp. could be assignated to Achroomyces soranus Hauerslev. A collection of Occultifur internus Oberw. with very small basidia, parasitizing in Dacrymyces minor Peck, is presented as forma minor ad int. Achroomyces sp. ss. Roberts 1997 (based on Henrici 25-2-1995), a species with zygoconidia, was detected in Myxarium nucleatum Wallr.; a few scytheform basidiospores could be observed. Heteromycophaga glandulosa P. Roberts, the conidial stade of a supposed auricularioid parasite, was found in Exidia truncata Fr.: Fr. Exidopsis pulverea Hauerslev, a powdery species belonging to the segregate Endoperplexa, was found on Populus canadensis. Tremella invasa Hauerslev was detected parasitizing Trechispora stellulata (Bourd. & Galz.) Liberta. Trimorphomyces papilionaceus Bandoni & Oberw. was found in the conidial stade, developing the typical butterfly-like conidia. A collection of an Ingoldiella sp., although not being a hetero-basidiomycete, is presented because of the macroscopical resemblance to a tiny fruitbody of Myxarium nucleatum; the species is very similar to I. nutans Bandoni & Marvanovà but differs only in the presence of thornlike appendages on the arthroconidia.
All figures from mounts with 1% Congo-red in NH3-Glycerine.
12-14
A list of fungal taxa described by G. Verplancke (1898-1964)
Ruben Walleyn & Gunther Van Ryckegem
A list is given of the 99 fungal taxa described by the Belgian plant pathologist Prof. dr. Germain J.P.J. Verplancke (17/02/1998 – 2/9/1964), alone or with other authors. Type material of these taxa is preserved in the herbarium of Ghent University (GENT), except for that of Gloeosporium miltoniae and Colletotrichum orchidearum f. cochliodae, which is presumably lost.
15-20
Een nieuwe en een zeldzame Myxomyceet voor België: Licea scyphoides Brooks & Keller en Willkommlangea reticulata (Alb. & Schwein.) Kuntze
Myriam de Haan
During an excursion in the domain Palingbeek (Zillebeke, Prov. of West-Flanders) on the 1st of November 1999 Licea scyphoides Brooks & Keller has been collected from staked logs of broad-leaved trees. This rather small, 0,1-0,4 mm high corticolous myxomycete has stipitate, globose to obovoid sporocarps that are mainly characterised by the presence of an equatorial, circumscissile dehiscence. The glossy, olive-brown peridium is papillose on the inside. The spores, 10,5-13,0 µm diam., are minutely roughened and their colour is pale grey-brown with a distinct olivaceous tone. This is the first record for Belgium.
A bright orange-red plasmodium of Willkommlangea reticulata (Alb. & Schwein.) Kuntze was collected during a field trip at the forest Calmeynbos (De Panne, Prov. of West-Flanders) on the 2nd of Novembre 1996, which matured almost 2 months later. This cosmopolitan but uncommon myxomycete has worm-like plasmodiocarps that branch and sometimes form a net, 0,3-0,6 mm diam., up to 3 cm long. The peridium is orange to rust-coloured later changing to pale ochraceous yellow; it is incrusted with pale yellow granules. Remarkable are the dark red, wax-like spots dispersed over the surface of the peridium. The capillitium is complex, it consists of a physaroid, spiny net of colourless to yellow tubules with small nodes and badhamoid net-fragments filled with white to orange chalk-granules. Another part of the capillitium is formed by white to pale yellow plates that are transversely oriented on the axis of the plasmodiocarp. These plates have very irregular borders and are sometimes perforated. In our collection the plates do not seem to be present in all plasmodiocarps. The spores measure 9,5-11,0 µm diam., are pale lilac-brown in transmitted light and are covered with small warts.
Descriptions with colour drawings of the macroscopical and microscopical features of both species are given.
21-41
Bijdrage tot de kennis van het subgenus Telamonia (Cortinarius) in België
André de Haan, Jos Volders & Luc Lenaerts
In this seventh report by the Cortinarius study-group of the “Antwerpse Mycologische Kring” 6 collections found in 1999 are fully described, illustrated and discussed: Cortinarius acutus (Pers.: Fr.) Fr., C. bibulus Quél., C. urbicus Fr., C. striaepilus J. Favre, C. flabellus (Fr.: Fr) Fr. and a new species, C. dunensis (english descrip-tion provided). Cortinarius dunensis nov. spec. is characterised by its slender fruitbodies, a white silvery stipe, distinctly verrucose spores and a not to weakly incrusted pileipellis with a very peculiar orange tinge when mounted in NH3-solution. It was found growing abundantly under Salix repens in coastal dunes. The species is closely related to Cortinarius dumetorum J. Favre which has smaller fruitbodies, less ornamented spores and lacks the orange tinge in the pileipellis. It comes close to Cortinarius pygmaeus (Velen.) Moser but this species has larger spores and grows on mossy branches of beech.
In addition two collections of previously treated species are macroscopically described and commented: Cortinarius cohabitans P. Karst. (suppl. coll. 2, 29 & 38) and C. umbrinolens. Studying this last collection it came clear that a previous collection (coll. 4) had to be renamed as C. decipiens (Pers.:Fr.) Fr. and a previous collection of C. brunneus var. glandicolor (coll. 26) belongs to C. umbrinolens.
42-44
Index Sterbeeckia 1(1961) – 20(2001)
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