New collections of Flammulina rossica - New collections of Flammulina rossica - Czech Mycol. 60(1): 113–121, 2008

Aug 27, 2026

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Paper reports three herbarium-based records of Flammulina rossica from the München herbarium (M), including two collections from Germany and one from South Dakota, USA. Micromorphological characters from dried specimens are examined and illustrated, with attention to spore and cystidial traits and pileipellis organization. Variability and species delimitation are discussed, and existing knowledge is consolidated regarding distribution, ecology, morphology, and biology of the species. Findings support a widespread but rare Northern Hemisphere pattern beyond trans-Beringian occurrence.

LanguageEnglish

CategoryResearch & Report

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Pages9

Reading Time23 min

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Introduction

Material and Methods

Results and Discussion

CZECH MYCOL. 60(1): 113–121, 2008 New collections ofFlammulina rossica SLAVOMÍR ADAMČÍK1 and SOŇA RIPKOVÁ2 1Institute of Botany SAS, Dúbravská cesta 14, SK-845 23 Bratislava, Slovakia; [slavomir.adamcik@savba.sk](slavomir.adamcik@savba.sk) 2Comenius University in Bratislava, Faculty of Natural Sciences, Department of Botany, Révová 39, SK-811 02 Bratislava, Slovakia; [ripkova@fns.uniba.sk](ripkova@fns.uniba.sk) Adamčík A. and Ripková S. (2008): New collections of Flammulina rossica.– Czech Mycol. 60(1): 113–121. Two specimens from Germany and one from South Dakota, USA, were identified as Flammulina rossica during the examination of the München herbarium (M) material of the genus Flammulina. Micromorphological characters of these specimens are described and illustrated. The variability and delimitation ofF. rossica is discussed and the knowledge of its distribution, ecology, morphology and biology is summarized. Key words: fungi, Basidiomycota, Xerulaceae, distribution, morphology. AdamčíkA. a Ripková S. (2008): Ďalšie zbery druhuFlammulina rossica.– Czech Mycol. 60(1): 113–121. Počas revidovania herbárového materiálu rodu Flammulina z Mníchova (M) sme dva zbery z Nemecka a jeden z Južnej Dakoty v USA určili ako Flammulina rossica. V práci uvádzame opis a vyobrazenie mikromorfologických znakov týchto zberov. Hodnotíme variabilitu a ohraničenie druhuF. rossica a sumarizujeme poznatky o jeho rozšírení, ekológii, morfológii a biológii. INTRODUCTION Flammulina rossica Redhead et R. H. Petersen was described as a new species based on material from eastern Russia and USA: Alaska (Redhead and Petersen 1999). Fruitbodies of this species were also collected in these two regions (Hughes et al. 1999), which suggested the idea of its migration between Eurasia and North America via the Bering land bridge during the last glacial maximum (Redhead and Petersen 1999, Hughes et al. 1999). However, more recently, the fungus has been detected in western Russia, Japan, USA: New York State, northern Thailand (Petersen and Hughes 2007), Canada: British Columbia (Petersen et al. on-line) and Tibet (Anonymus on-line). During our study of taxonomy and biogeography of the genus Flammulina in Central Europe in the years 2004–2007, we identified three specimens at the München herbarium (M) as F. rossica. Two of these collections were collected in CZECH MYCOL. 60(1): 113–121, 2008 Germany, one in USA: South Dakota. Thus, these collections also support the fact that F. rossica is widespread (but rare) in the Northern Hemisphere and not only trans-Beringian (Petersen and Hughes 2007). The aim of our paper is to present the three mentioned collections ofF. rossica from herbarium M, and to summarize current knowledge of its distribution, ecology, morphology and biology. MATERIAL AND METHODS More than 40 Flammulina specimens deposited in herbarium M were studied in 2004. Among them 3 specimens of F. rossica were identified. The micromorphological characters were observed in dried material under an Olympus CX41 light microscope in oil immersion. Fragments of lamellae, stipe and pileipellis were examined in 5 % KOH, Melzer’s reagent and a solution of Congo Red in ammonia (1 ml of 25 % ammonia dissolved in a filtrated solution of 1.5 g Congo Red and 50 ml distilled water). Extreme values of microcharacters were estimated as 10 and 90 percentiles of 30 measurements, the values in parentheses are the 5 and 95 percentiles. Q is the ratio of spore length and width. The abbreviations of herbaria are cited in accordance with the Index Herbariorum (Holmgren et al. 1990). Literature data on specimens are presented in their original form. RESULTS AND DISCUSSION Flammulina rossica Redhead et R. H. Petersen, Mycotaxon 71: 290, 1999. H o l otyp e: Russia, Primorski Terr., Dist. Ternai, Sichote Alin Biosphere Reserve, Meise, on Populus log, 12 Sept. 1990, R. H. Petersen 3232 (TENN 49489). Macro morphological characters: Redhead

FAQs

What new collections of Flammulina rossica are reported in this paper?

The paper documents three specimens identified at the München herbarium (M): two from Germany and one from South Dakota, USA.

How were the micromorphological characters studied?

Micromorphological traits were observed in dried material under a light microscope using reagents including 5% KOH, Melzer’s reagent, and Congo Red in ammonia, with spore measurements summarized using percentile estimates.

What aspects are addressed besides the specimen descriptions?

The study discusses variability and species delimitation and summarizes knowledge of the species’ distribution, ecology, morphology, and biology.

Aug 27, 2026

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