Phytotaxa 2023-02-02T11:20:12+13:00 Zhi-Qiang Zhang Open Journal Systems <p><strong>Phytotaxa </strong>is world's largest journal in botanical taxonomy. </p> <p><strong><em>Eugenia</em> (Myrtaceae) from Mexico: checklist, distribution, and conservation assessments</strong></p> 2023-02-01T15:06:46+13:00 VICTOR C. UC GALA KARINNE SAMPAIO VALDEMARIN EVE LUCAS RAQUEL NEGRÃO FIORELLA F. MAZINE <p>Myrtaceae is represented in Mexico by 10 genera and ca. 109 species mainly occurring in warmer climatic zones. <em>Eugenia</em> is one of the most diverse genera in Myrtaceae, with about 1,150 species, distributed from Mexico, Cuba and the Antilles to Uruguay and Argentina, with fewer representatives in Africa and Southeast Asia. This study presents a checklist of the 87 species of <em>Eugenia</em> that occur in Mexico as well as provides assessments of environmental threat for each species. The checklist was prepared in stages, gathering data from international databases, consulting relevant bibliography (mainly Mexican Floras), personal visits to key herbarium collections (MEXU, CICY and K), and analysis of specimen images available online. Extinction risk assessments follow the categories and criteria of the IUCN Red List of Threatened species version 3.1. calculating the extent of occurrence (EOO) and area of occupancy (AOO) parameters using the GeoCat software (Geospatial Conservation Assessment Tool). Extinction risks are provided for eighty-seven species of <em>Eugenia</em>, including notes on species distributions. Mexican states with the highest number of species of the genus are Chiapas and Veracruz, with 48 and 31 species, respectively. Forty-six species are endemic to Mexico, which represents 53% of the total of species occurring in the country. Regarding extinction risk, from a total of 87 species, 33 species (38%) are assessed with a threatened category, with 7 Critically Endangered (CR), 14 Endangered (EN), and 12 Vulnerable (VU); 54 species are not threatened, 42 of these rated as Least Concern (LC) and 12 as Near Threatened (NT). This study reveals the degree of extinction risk that exists to native or endemic Mexican <em>Eugenia</em> species, and highlights the urgent need to take action to protect, conserve and monitor their populations in the wild.</p> 2023-02-02T00:00:00+13:00 Copyright (c) 2023 <p><strong>Two New species of <em>Impatiens</em> (Balsaminaceae) from Myanmar</strong></p> 2023-02-01T15:23:45+13:00 MYO MIN LATT NOBUYUKI TANAKA BYUNG BAE PARK <p><em>Impatiens yinyinkyii </em>M.M.Latt, B.B.Park &amp; Nob.Tanaka and<em> I. horizontalis</em> M.M.Latt, B.B.Park &amp; Nob.Tanaka (Balsaminaceae) are described and illustrated. Those new species were discovered in Htamanthi Wildlife Sanctuary, northwestern Myanmar. Description, photographic data as well as the comparative characters with their similar species are provided. <em>Impatiens yinyinkyii</em> is similar to <em>I. masonii</em> Hook.f., but differs in having three dark purple blotches in center of flower, specifically at base of dorsal and upper petals of united petals. <em>Impatiens horizontalis</em> resembles <em>I. stenantha</em> Hook.f., <em>I. prostrata </em>Hook. f.<em>, I. repens </em>Moon<em>, I. procumbens</em> Franch and <em>I. reptans </em>Hook. f. in having larger, glabrous and elliptic to lanceolate leaves, serrate margin with antrorse bristles, deeply bucciniform lower sepal, twisted spur with abruptly capitate tip, linear ovary, spheroid seed and finally uncommon conspicuous stout stem which is horizontally creeping.</p> 2023-02-02T00:00:00+13:00 Copyright (c) 2023 <p><strong>Floral ontogeny of <em>Magnolia</em> (Magnoliaceae) species provides insights into floral evolution but does not possess taxonomic value at the genus level</strong></p> 2023-02-01T15:27:55+13:00 LI-YONG SUN XIAO-XIA WAN TANG-JIE NIE YAO CHEN ZENG-FANG YIN <p>Floral ontogeny can assist in understanding formation of mature floral structure and provide taxonomic and evolutionary insights at the species and genus level. In this study, floral ontogeny of <em>Magnolia liliiflora</em>, <em>M. maudiae</em> and <em>M. figo</em> was investigated using scanning electron microscopy. The results showed that tepal primordia of these species are initiated asynchronously in whorls, whereas stamen and carpel primordia are initiated spirally and centripetally. Variation in tepal number in <em>M. maudiae</em> was also observed at the early stage of differentiation. Our study demonstrates that floral ontogeny is remarkably homogenous in Magnoliaceae, and thus it cannot serve as a basis for classification at the genus or lower taxonomic levels. Nonetheless, the transition of floral development from typical spiral flowers to typical whorled flowers is of great significance for understanding evolution of angiosperm flowers.</p> 2023-02-02T00:00:00+13:00 Copyright (c) 2023 <p><strong>Two new species of <em>Xanthagaricus</em> from Punjab, Pakistan</strong></p> 2023-02-01T15:32:15+13:00 MUHAMMAD HAQNAWAZ ABDUL REHMAN NIAZI ABDUL NASIR KHALID <p>Many basidiomata collected during a fungal survey of the Indus Riverbed revealed two new taxa in the genus <em>Xanthagaricus</em>. Phylogenetic analyses of the Internal Transcribed Spacers (ITS) &amp; ribosomal Large Subunit (28S) have confirmed that these new species (namely <em>Xanthagaricus punjabensis</em> &amp;<em> Xanthagaricus kotadduensis</em>) form a separate clade with a strong bootstrap value from the closest species of <em>Xanthagaricus</em>. The closest taxon to <em>Xanthagaricus punjabensis</em> is <em>X. Thailandensis</em>, while <em>Xanthagaricus kotadduensis</em> is closely related to <em>X. omanicus</em>. <em>Xanthagaricus punjabensis</em> is unique due to its umbonate disc, dull orange to light yellow lamellae, gray rhizomorphic mycelial mat at the base of stipe, presence of annulus, globose to subglobose basidiospore, narrowly utriform to utriform cheilocystidia, and clavate to broadly clavate caulocystidia. Our second new taxon,<em> X. Kotadduensis</em>, can be characterized by the absence of annulus, utriform to knobbed cheilocystidia, and oblong caulocystidia. Our results strongly support the placement of the new taxa within the genus <em>Xanthagaricus</em> and provide a unique insight into the phylogenetic relationships within this genus. With this addition, the number of known species of <em>Xanthagaricus</em> from Pakistan becomes three.</p> 2023-02-02T00:00:00+13:00 Copyright (c) 2023 <p><strong>A new species of <em>Mutinus</em> (Phallaceae, Phallales) from Shandong Province, China</strong></p> 2023-02-01T15:35:35+13:00 ZHONG-LIANG ZHOU ZHUANG LI YUE LYU AO LIU YI-MING GAO PAN-MENG WANG <p>A new species, <em>Mutinus taishanensis</em> (Phallaceae, Phallales, Basidiomycota), was found growing in a forest of <em>Phyllostachys flexuosa</em> and <em>Quercus palustris </em>in Zhulin Temple, Mount Tai Scenic Area (Tai’an City, Shangdong Province, China). It is described as new based on morphological, molecular and ecological evidence. Our phylogenetic analyses based on DNA sequences of the large subunit of nuclear ribosomal DNA (LSU), subunit 6 of ATP synthase (<em>atp6</em>) and the second largest subunit of RNA polymerase II (RPB2) support the inclusion of this new species in the genus <em>Mutinus</em> as it forms an independent clade in the phylogenetic tree. Morphologically, <em>M. taishanensis</em> differs from any known species by the combination of light red to red pseudostipe, red conical fertile portion (covering about 1/4–1/5 of the total length of pseudostipe), and relatively small basidiospores. We present this new species with illustrated morphological description. phylogeny and comparison with morphologically similar or phylogenetically related species.</p> 2023-02-02T00:00:00+13:00 Copyright (c) 2023 <p><strong><em>Bupleurum iranicum</em> (Apiaceae), a new species from Talesh Mountains, northwestern Iran</strong></p> 2023-02-01T15:41:56+13:00 MAHMOUD BIDARLORD EUGENE KLJUYKOV DMITRY LYSKOV <p>A new species, <em>Bupleurum iranicum</em> (Apiaceae), is described from Ardabil Province, northwestern Iran. The new species is similar to <em>B. anatolicum</em> and <em>B. brachiatum</em> in the narrow, linear cauline leaves, herbaceous bracts similar to bracteoles, bracteoles shorter than the flowers, fruit surface, and petals smooth, and number of umbel rays 2–3. At the same time, the new species differs from the above-mentioned taxa in features of the stem features (non-branched or slightly branched vs. diffusely or dichotomously branched), umbel rays (subequal vs. unequal), length and number of bracts (equal 1–2 vs. subequal 2–5), and shape (elliptic to ovate vs. lanceolate). A detailed description and comparisons with other similar taxa, color images, distribution and habitat, and a taxonomic key to the <em>Bupleurum</em> species from Iran are provided. The new species should be listed as Critically Endangered, its protection is therefore recommended.</p> 2023-02-02T00:00:00+13:00 Copyright (c) 2023 <p><strong><em>Pyrofomes lagerstroemiae</em> (Polyporaceae, Basidiomycota), a new species from Hubei Province, Central China</strong></p> 2023-02-01T15:46:48+13:00 LU-XIN TANG YI-ZHE ZHANG JIA-QI LIANG SHAO-FENG JIANG JING SI HAI-JIAO LI <p><em>Pyrofomes lagerstroemiae sp</em>. <em>nov</em>. is described and illustrated from Hubei Province, Central China, based on morphology and molecular phylogenetic analyses. The new species is characterized by greyish brown to fuscous, pileate, at first hemispherical, later triquetrous basidiomata, cinnamon buff to greyish brown pore surface, big pores (1–2.5 per mm), subglobose to broadly ellipsoid, thick-walled, truncate, smooth, IKI–, CB+ basidiospores (5–6.2 × 4–5.4 µm), and growing gregarious on <em>Lagerstroemia indica</em>.</p> 2023-02-02T00:00:00+13:00 Copyright (c) 2023 <p><strong><em>Trifolium elazizense</em> (Fabaceae), a new species from Turkey</strong></p> 2023-02-01T15:51:23+13:00 MUSTAFA KESKİN VEYSEL SONAY MEHMET MARUF BALOS <p><em>Trifolium elazizense</em>, a new species of <em>Trifolium</em> sect. <em>Trifolium</em> from East Anatolia in Turkey is described. It grows in subalpine regions with steep slopes and shallow soil at high altitudes. The new species is morphologically close to <em>T. longidentatum</em> and <em>T. kurdistanicum</em>, and can be considered a member of the new subsect. <em>Stipulia</em>. <em>Trifolium elazizense</em> is characterized by hairy stipules, the throat of calyx closed by callus hairs, inflorescences without bracts, obviously unequal calyx teeth, longest tooth 3-nerved, others 1–3 nerved.</p> 2023-02-02T00:00:00+13:00 Copyright (c) 2023 <p><strong>Taxonomic notes on New Caledonian Malpighiales: <em>Acridocarpus</em>, <em>Crossostylis</em>, <em>Erythroxylum</em>, and <em>Xylosma</em></strong></p> 2023-02-01T15:55:58+13:00 YOHAN PILLON <p>Taxonomic notes are made on the Malpighiales of New Caledonia. The names <em>Acridocarpus austrocaledonicus</em> Baill. (Malpighiaceae), <em>Crossostylis grandiflora</em> Brongn. &amp; Gris, <em>C. multiflora</em> Brongn. &amp; Gris, <em>C. sebertii</em> Pancher ex Brongn. &amp; Gris (Rhizophoraceae), and <em>Erythroxylum novocaledonicum</em> O.E.Schultz (Erythroxylaceae) are lectotypified. Based on published molecular phylogenetic and morphological evidence, <em>Lasiochlamys</em> Pax &amp; K.Hoffm. is better treated as a synonym of <em>Xylosma</em> G.Forst. (Salicaceae), and five new combinations and one new name are provided to implement this change.</p> 2023-02-02T00:00:00+13:00 Copyright (c) 2023 <p><strong><em>Oreocharis yangjifengensis</em> (Gesneriaceae), a new species from Yangjifeng National Nature Reserve of Yingtan City, Jiangxi Province, China</strong></p> 2023-02-01T15:58:40+13:00 RUI-FENG LI XIN-GUI LE LIN XU STEPHEN MACIEJEWSKI BIN CHEN FANG WEN <p><em>Oreocharis yangjifengensis</em> F.Wen &amp; B.Chen, a new species of Gesneriaceae from Yangjifeng National Nature Reserve, Yingtan city, Jiangxi province, East China, is described and illustrated. It can be easily distinguished from other <em>Oreocharis </em>species by having a zygomorphic and urceolate corolla, and peduncle, bracts, pedicel and calyx densely pale brown woolly to pubescent.</p> 2023-02-02T00:00:00+13:00 Copyright (c) 2023 <p><strong>Lectotypification of 4 names of <em>Viburnum</em> (Adoxaceae)</strong></p> 2023-02-01T16:37:08+13:00 LIAO-CHENG ZHAO MING TANG <p>Examination of the protologues of <em>Viburnum henryi</em>, <em>V. brachybotryum </em>var. <em>tengyuehense</em>, <em>V. theiferum</em> and <em>V. ternatum</em> revealed that at least two gatherings were mentioned as types for every one of them, making it necessary to designate a lectotype for each of the 4 names.</p> 2023-02-02T00:00:00+13:00 Copyright (c) 2023 <p><strong>Typification and threat assessment of <em>Jasminum parkeri</em> (Oleaceae), a point endemic and critically endangered species of Indian Western Himalaya</strong></p> 2023-02-01T16:39:59+13:00 AMBER SRIVASTAVA VIJAY V. WAGH S. K. SRIVASTAVA <p>While assessing the threat status and conservational approach of <em>Jasminum parkeri</em> Dunn, an endemic and threatened taxon in Indian Western Himalaya, it has been noticed that the name of this species has not been typified so far. This article deals with the lectotypification of <em>Jasminum parkeri</em> and conservation efforts of this highly habitat specific species.</p> 2023-02-02T00:00:00+13:00 Copyright (c) 2023