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In memoriam Sam Groenhuijzen (1913-2002)
L. Freese-Woudenberg
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3-3
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Sematophyllum substrumulosum (Humpe) Britt. nieuw voor Nederland en eerste vondst van Lophocolea semiteres in Drenthe
B.O. van Zanten
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7-13
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Sematophyllum substrumulosum (Hampe) Britt. new to The Netherlands and first record of Lophocolea semiteres for the Prov. of Drenthe. Sematophyllum substrumulosum was found in May 2000 for the first time in The Netherlands in the north of the province of Drenthe (estate Heidehof) between Rolde and Gieten. It grew in partly shade on small, on the forest floor lying branches in a ca. 70 year old plantation of Pseudotsuga menziesii. The nearest known locality of the species is in Belgium near the Dutch border (Kapellen, Mastbroek, Prov. of Antwerp), ca. 250 km to the south, discovered there in 1998. This atlantic-mediterranean species is obviously extending its range to the north, probably as a response to the mild winters of the last few decades. The main associates are: Brachythecium rutabulum, B. salebrosum, Eurhynchium praelongum, Herzogiella seligeri, Hypnum cupressiforme, Lophocolea heterophylla, L. semiteres (first record for the Prov. of Drenthe), Plagiothecium laetum, Rhynchostegium confertum and Aulacomnium androgynum.
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Sematophyllum substrumulosum ook in Noord-Brabant
H.M.H. van Melick
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14-15
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Sematophyllum substrumulosum occurs in the province of Brabant as well. Another (second) locality of Sematophyllum substrumulosum in the Netherlands was discovered in a young, species-poor pine forest near Helmond (south-east Brabant) in 2002. The species was found on a decaying branch on the forest floor.
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Lichenen op asbestdaken
J.L. Spier
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16-20
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Lichens on asbestos roofs in The Netherlands. For many years asbestos has been a much used material with many possibilities, the most important application being roof-cover. It is, however, going to disappear in The Netherlands because of its toxicity (lung cancer), without nobody knowing the lichens growing on it. An examination was started in various parts of The Netherlands in order to get an idea of the lichens growing on asbestos roofs.
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Over de vorming van sporenkapsels door Fontinalis antipyretica Hedw. (Gewoon bronmos)
M.J.H. Kortselius
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21-31
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On the production of sporophytes in Fontinalis antipyretica Hedw. It is widely believed that Fontinalis antipyretica produce sporophytes only when emerged. Evidence is presented that sporophytes are produced when submerged. However, dry conditions are required for dehiscence of the operculum. When ripe capsules become desiccated, the operculum is torn loose, and then lifted by hygroscopic movements of the exostome teeth. The release of spores is promoted by –reversible– shape changes of the capsule.
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Nieuwe korstmossen en licheenparasieten in Nederland, met aanvullingen op de checklist
A. Aptroot, C.M. van Herk, L.B. Sparrius & J.L. Spier
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32-37
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New lichens and lichenicolous fungi from the Netherlands, with additions to the checklist. The following lichens taxa are reported as new to the Netherlands: Buellia schaereri, Chrysothrix flavovirens, Cladonia gracilis ssp. turbinata, Lecanora xanthostoma, Micarea micrococca, Parmelia stuppea, Pronectria robergei and Pyrenocollema arenisedum. Pertusaria flavida, thought to be extinct, was refound. A list is given of all new taxa reported since the last addition to the checklist.
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Hylocomium splendens (Brid.) Schimp. (Grof etagemos) in Nederland
P. Bremer
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38-53
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Hylocomium brevirostre (Brid.) Schimp. in The Netherlands. Hylocomium breviroste is rare in the Netherlands. Since 1977 47 patches have been found, 83% in the woods of the IJsselmeerpolders. Here Hylocomium brevirostre prefers trench sides within plantations of Fraxinus excelsior on boulderclay or medium fine sand, belonging to the Alno-Padion. Hylocomium breviroste established here probably c. 10 - 25 years after afforestation. As Hylocomium brevirostre is always sterile, establishment always has to take place with spores from abroad. After establishment patches grew larger by vegetative spread. Moreover new patches arose within a distance of 1 m from mother-patches. Despite some new locations in the southern and northern parts of the Netherlands, no continuous establishment takes place in the woods of Flevoland. For that reason the species can at best be designated as potential threatened species.
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Twee nieuwe licheenparasieten voor Nederland: Arthonia apotheciorum [A. clemens] en Tremella phaeophysciae
D.W. Wolfskeel
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54-56
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Two new lichen parasites for the Netherlands: Arthonia apotheciorum [A. clemens] and Tremella phaeophysciae
In 2000 two new lichen parasites for the Netherlands were found in Schagen, in the province of North Holland: Arthonia apotheciorum [A. clemens] parasitizing Lecanora albescens on a bunker wall and Tremella phaeophysciae parasitic on Phaephyscia orbicularis growing on an elm tree (Ulmus).
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Hans Kruijer gepromoveerd
H.J. During
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57-57
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De Nederlandse Veenmossen
R.J. Bijlsma
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58-59
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Jaarverslag BLWG 2002
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60-60
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Wijzigingen ledenlijst BLWG t/m 11 januari 2003
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63-63
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