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Specimens of Amanita sect. Caesareae, collected in Xieng Khouang and Vientiane provinces in Laos from highland forests dominated by members of Fagaceae and Pinaceae, are studied based on morphological characters and analyses of ITS sequences. Two species, namely A. princepoides and A. chepangianoides, are reported as new, both found in association with Fagaceae, whereas A. pseudoprinceps and A. subhemibapha, recently described from China and A. rubromarginata from Japan, are confirmed from Laos and found in forests with Fagaceae and Pinaceae. The phylogenetic analyses to recognize the Amanita species showed that the golden-brown to greyish orange A. princepoides and the dominantly white A. chepangianoides cluster with A. aporema, A. chepangiana, A. egregia, A. princeps and A. pseudoprinceps. A dichotomous key to identified and likely occurring Amanita species in Laos within sect. Caesareae is also provided. [ABSTRACT FROM AUTHOR]

European members of the species-rich sect. Vaginatae of the genus Amanita are studied focusing on Central (Austria, Hungary, N Italy and Romania), Western (France) and North European (Norway) collections. The combination of a 4-locus (nrDNA ITS, nrDNA LSU, RPB1 and TEF1-α) molecular phylogenetic analysis and a morphological approach resulted in the discovery of three new species: Amanita deflexa and A. griseofulva from stirps Fulva and A. opaca from stirps Coryli. Furthermore, the albinotic white forms of A. griseofulva (f. albida) and A. opaca (f. cettoi) are formally named. As a result of the comprehensive taxonomic revision of Amanita sect. Vaginatae, 370 newly generated sequences are deposited to GenBank, and 17 species new to Hungary are reported. This study provides another step towards understanding the taxonomy and diversity of Amanita section Vaginatae in Europe. [ABSTRACT FROM AUTHOR]

Amanita collariata and A. subparcivolvata, two new species of A. section Amanita from Central China, were proposed here based on both molecular and morphological evidences. Amanita collariata is characterized by its small basidiomata and broadly ellipsoid basidiospores (10–11.5 × 7–9 μm). Amanita subparcivolvata is characterized by its orange-red pileus covered with yellowish, conical volval remnants and broadly ellipsoid basidiospores (9–12 × 7–10 μm). Multi-locus (ITS, nrLSU, RPB2, TEF1-α, and TUB2) phylogenetic studies indicated that A. collariata is closely related to the clade comprising A. subglobosa, A. pantherina, A. pseudopantherina, A. griseopantherina, and A. albocreata, while A. subparcivolvata is sister to A. parcivolvata. These two new species are described, illustrated, and compared with closely related and morphologically similar species. [ABSTRACT FROM AUTHOR]

A new species of Amanita sect. Lepidella, A. heishidingensis, is described based on both morphological and molecular evidences. It was compared with similar species and illustrated with line drawings and photographs. This species was found in Heishiding National Nature Reserve, Guangdong Province, South China. [ABSTRACT FROM AUTHOR]