Phytotaxa

Entoloma griseofibrillosus (Entolomataceae, Basidiomycota), a new species from Punjab, Pakistan

AIMAN IZHAR — 2023-03-21

A new species belonging to the Rusticoides clade of Entoloma, with an omphalinoid habit is described from Pakistan with detailed morphological descriptions, illustrations and molecular data. Illustrations of microcharacteristics and comparison with closely allied species are provided. Entoloma griseofibrillosus is distinguished based on a greyish brown, hygrophanous fibrillose pileus, sub-isodiametric angular spores, varying shapes of cheilocystidia and a pileipellis as a cutis. Phylogenetic estimation based on nrITS and nrLSU regions with a well-nested position of the described taxon is presented in the current study.

Marasmius margallensis, a new species of Marasmius sect. Sicci from Margalla Hills, Pakistan

FAUZIA RAZZAQ — 2023-03-21

Marasmius margallensis sp. nov. of sect. Sicci from Margalla hills, Islamabad, Pakistan, is described and illustrated, based on morphological characteristics and multigene phylogenetic analyses. The taxon is characterized by a pale yellow to dull orange pileus with light gray margins, clavate to narrowly fusiform basidiospores, rather short pleurocystidia and hymeniderm pileipellis with Siccus-type broom-cells. Marasmius pulcherripes is closest relative of the newly described species M. margallensis in sect. Sicci in phylogenetic analyses but the later one is distinct by macro-, and micro-morphological features and molecular data.

Pseudoboletus silvaticus (Boletaceae, Basidiomycota), a new species from Mexico

ALONSO CORTÉS-PÉREZ — 2023-03-21

The genus Pseudoboletus includes parasitic fungi and is well known in temperate zones. In this paper, we present the first Mexican collections of this genus. Two specimens were collected in a field expedition in a tropical montane cloud forest on the San Martín Tuxtla volcano, Veracruz, Mexico, resulting in a new species of Pseudoboletus, which grows on fruiting bodies of Scleroderma nitidum. Descriptions, illustrations, and photographs of P. silvaticus sp. nov. are provided. Also, its phylogenetic position in the Boletineae tree was inferred using nuclear 28S rDNA (28S) and translation elongation factor-1α (tef–1α) with Maximum Likelihood method and Bayesian Inference. Comparison between nuclear rDNA internal transcribed spacer region (ITS) sequences of P. parasiticus from North America and Europe and the new taxon were made. The original diagnosis of the genus Pseudoboletus is emended to include this new species.

Leucoagaricus gujratensis sp. nov. (Agaricaceae, Agaricales) from Pakistan

AMATU REHMAN — 2023-03-21

A novel mushroom, occurring on sandy soil was collected from scrubland of Gujrat district, Pakistan. Phylogenetic analyses of the nrDNA ITS region revealed that it clusters within Leucoagaricus section Leucoagaricus. Further morpho-anatomical analyses confirmed its uniqueness, and it is here described as Leucoagaricus gujratensis sp. nov. The distinguishing characters of this novel taxon are fragile basidiomata with brown to light brown squamules in the center on milky white pileus surface; creamy stipe with white central annulus; lacrymoid to amygdaliform basidiospores (5.4–8.6 × 3.9–5.5 μm) and clavate to slightly fusiform and fabiform cheilocystidia. The new mushroom resembles La. candidus in appearance but the morpho-anatomical and molecular characters prove its novelty. The number of Leucoagaricus species in Pakistan has reached up to 14.

Range extension, taxonomic note, molecular-phylogenetic relationship, and conservation of Frullania iriomotensis S.Hatt. (Marchantiophyta, Frullaniaceae), a rare liverwort previously known only from the type locality in Japan

CHATCHABA PROMMA — 2023-03-21

Frullania iriomotensis (Frullaniaceae), a rare liverwort previously known only from the type locality in Japan, was newly discovered in a rainforest in southern China. The first phylogenetic analyses based on the nuclear ribosomal ITS region and two chloroplast regions (rbcL, trnL–F) of F. iriomotensis reveal that it is sister to the tropical Asian F. repandistipula in the Diastaloba II group of F. subg. Diastaloba. Androecia and gynoecia are described and illustrated for the first time for this species and a proposal for conservation is presented.

Chiloschista densiflora (Orchidaceae), a distinctive species newly recorded from Xizang, China

YING-YING WEN — 2023-03-21

Chiloschista densiflora (Orchidaceae), a new record of flora of China, is described and illustrated based on materials from Motuo, Xizang. Morphologically, Chiloschista densiflora is characterized by middle lobe with a pubescent callus ranging from base to apex, two conical calli at base, short and stocky column.

**Two new species of Friesodielsia (Annonaceae) from Peninsular Thailand**

CHARAN LEERATIWONG — 2023-03-21

Two new Friesodielsia species (Annonaceae) from Peninsular Thailand, F. betongensis and F. chalermgliniana, are described and illustrated. The addition of these raises the total number of Friesodielsia species in Thailand to 18. A conservation assessment for each new species and an identification key for all Thai species are provided.

Symplocos sisparensis (Symplocaceae), a new species from the Nilgiri Biosphere Reserve, India

B. KARTHIK — 2023-03-21

Symplocos sisparensis, a new species of Symplocaceae has been collected from Mukurthi National Park in Nilgiris district of Tamil Nadu part of Nilgiri Biosphere Reserve (NBR). The new species is morphologically similar to Symplocos foliosa Wight, however it is differing from by its habit, branchlets, leaves, calyx lobes, style and fruit characters. Therefore, the new species is described with detailed description, phenology, distribution (including map) along with photographic plates and illustration to facilitate easy identification of this species in the field.

Rhagadiolus edulis (Cichorieae, Compositae), a replacement name for Lapsana rhagadiolus L. or a name of a new taxon?

P. PABLO FERRER-GALLEGO — 2023-03-21

Rhagadiolus edulis (Cichorieae, Compositae) can be treated either as a replacement name or as the name of a new taxon according to the International Code of Nomenclature for algae, fungi, and plants. Treating it as a replacement name would be nomenclaturally disruptive, whereas treating it as the name of a new taxon, confirmed by an appropriate typification, maintains current usage. Therefore, the nomenclatural type for the name Rhagadiolus edulis is discussed. The name is lectotypified by a specimen preserved in the Gaertner Herbarium at TUB.

Begonia chenii, a synonym of B. mariachristinae (Begoniaceae) in Myanmar

AUNG AUNG — 2023-03-21

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