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Saturday, March 12th, 2022
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| 2:53a | [Botany • 2022] Petrocosmea dejiangensis (Gesneriaceae) • A New Species from Guizhou, China
Abstract Southwestern China is the centre of diversity of Petrocosmea (Gesneriaceae). Here, a new species, named Petrocosmea dejiangensis, from north-eastern Guizhou, China, is described. The new species is most similar to P. martini, but it is distinguished from the latter by two dark blue-purple stripes inside the corolla tube along its entire length, the anthers shorter than the filaments, and the stigma apex rounded. Three populations comprising approximately 120 mature individuals were found at and near the type locality. This new taxon was assessed as “Data Deficient” (DD), according to IUCN standards. Keywords: Didymocarpoideae, Flora of China, Petrocosmea martini
Petrocosmea dejiangensis Sheng H.Tang & Jian Xu, sp. nov. Petrocosmea dejiangensis has a highly fused upper lip. This important character is shared by 21 species of Petrocosmea. The new species is most similar to P. martini (Fig. 2) in the indumentum of the petiole, leaf blade, filaments, and ovary, but differs from it in having inconspicuous bracts (vs. conspicuous), two dark blue-purple stripes inside along the entire corolla tube (vs. two purple spots inside the tube under the filaments), throat blue-purple (vs. white), anthers shorter than filaments (vs. anthers subequal to filaments in length), and stigma apex rounded (vs. flat). Etymology:—The new taxon is named after the type locality, Dejiang County, China. The Chinese name is “Dé Jiāng Shí Hú Dié” (德江石蝴蝶). Distribution and habitat:— Three populations with nearly 120 mature individuals were found at Nangan town, Dejiang County, Guizhou Province, China. The plants grew on moist shady rocks in valleys at an elevation of ca. 600–700 m. The main companion species were Platycarya strobilacea Siebold & Zuccarini (1843: 741–742), Lindera communis Hemsley (1891: 387), and Carpinus sp. Linnaeus (1753: 998) sp. Jian Xu, Sa Li, Sheng-Hu Tand and Qi-Fei Ren. 2022. Petrocosmea dejiangensis (Gesneriaceae), A New Species from Guizhou, China. Phytotaxa. 539(1); 17-23. DOI: 10.11646/phytotaxa.539.1.2  | ||||||||||
| 3:05a | [Botany • 2022] Impatiens liupanshuiensis (Balsaminaceae) • A New Species from Guizhou, China
Abstract Impatiens liupanshuiensis (Balsamianceae), belonging to I. subgen. Impatiens, is recognised as a new species from Guizhou, China and it is described and illustrated. It is morphologically similar to I. xanthocephala W.W. Sm. in its yellow flowers, extremely small basal lobes on lateral united petals, broadly-dolabriform distal lobes and funnelform lower sepal. However, it is distinctive in the number of lateral sepals, teeth on the margin of lateral sepals, the recurvature of the dorsal petal, the number of lateral veins, the shape and size of the lamina and the type of lamina margin. A detailed description of the new species and colour photographs are provided. Its geographical distribution and morphology are also compared to similar species. Keywords: China, Flora of Guizhou, Impatiens, morphology, taxonomy
 Impatiens liupanshuiensis X.X.Bai & T.H.Yuan, sp. nov. Diagnosis: This species is similar to Impatiens xanthocephala W.W. Sm. in its yellow flowers, funnelform lower sepal, broadly-dolabriform distal lobes of lateral united petals and extremely small basal lobes, but it can be distinguished by having 2 (vs. 4) lateral sepals with ciliate (vs. entire) margin, dorsal petal recurved (vs. patent), lateral veins 8–10 pairs [vs. 2–3(4) pairs], apex of the distal lobes of the united petals retuse (vs. rounded), margin serrulate (vs. remotely crenate or shallowly undulate), lamina ovate-lanceolate or lanceolate (vs. ovate or ovate-oblong), 5–10.5 × 1.7–2.8 cm (vs. 1–2 × 0.8–1 cm) and lamina margin serrulate (vs. remotely crenate or shallowly undulate). Distribution: This species is currently known from only one population in Xiaojiucaiping Mountain, Zhongshan District, Liupanshui City, Guizhou, China. The population is large, with about 3000–3500 individuals. Ecology: This species was collected growing in Fargesia spathacea shrubs on the side of the plank road at an elevation of 2730–2887 m in Xiaojiucaiping Mountain, which is the highest mountain in Guizhou. The main associated species were F. spathacea, Impatiens lecomtei, Sorbaria arborea C.K. Schneid. (Rosaceae), Pteridium revolutum (Blume) Nakai (Dennstaedtiaceae), Hypericum patulum Thunb. (Hypericaceae), Eupatorium lindleyanum DC. (Asteraceae) and Senecio scandens Buch.-Ham. ex D. Don (Asteraceae). Etymology: The specific epithet ‘liupanshuiensis’ refers to the type locality, Liupanshui City, Guizhou, China. The Chinese name is given as “六盘水凤仙花”. Tao-Hua Yuan, Yi Chen, Shuang Yu, Liu-Yi Ren, Rong-Xin Huang, Mei-Jun Li and Xin-Xiang Bai. 2022. Impatiens liupanshuiensis (Balsaminaceae), A New Species from Guizhou, China. PhytoKeys. 192: 37-44. DOI: 10.3897/phytokeys.192.77269 | ||||||||||
| 3:40a | [Fungi • 2022] Taming the Beast: A revised Classification of Cortinariaceae based on Genomic Data
Abstract Family Cortinariaceae currently includes only one genus, Cortinarius, which is the largest Agaricales genus, with thousands of species worldwide. The species are important ectomycorrhizal fungi and form associations with many vascular plant genera from tropicals to arctic regions. Genus Cortinarius contains a lot of morphological variation, and its complexity has led many taxonomists to specialize in particular on infrageneric groups. The previous attempts to divide Cortinarius have been shown to be unnatural and the phylogenetic studies done to date have not been able to resolve the higher-level classification of the group above section level. Genomic approaches have revolutionized our view on fungal relationships and provide a way to tackle difficult groups. We used both targeted capture sequencing and shallow whole genome sequencing to produce data and to perform phylogenomic analyses of 75 single-copy genes from 19 species. In addition, a wider 5-locus analysis of 245 species, from the Northern and Southern Hemispheres, was also done. Based on our results, a classification of the family Cortinariaceae into ten genera—Cortinarius, Phlegmacium, Thaxterogaster, Calonarius, Aureonarius, Cystinarius, Volvanarius, Hygronarius, Mystinarius, and Austrocortinarius—is proposed. Seven genera, 10 subgenera, and four sections are described as new to science and five subgenera are introduced as new combinations in a new rank. In addition, 41 section names and 514 species names are combined in new genera and four lecto- and epitypes designated. The position of Stephanopus in suborder Agaricineae remains to be studied. Targeted capture sequencing is used for the first time in fungal taxonomy in Basidiomycetes. It provides a cost-efficient way to produce -omics data in species-rich groups. The -omics data was produced from fungarium specimens up to 21 years old, demonstrating the value of museum specimens in the study of the fungal tree of life. This study is the first family revision in Agaricales based on genomics data and hopefully many others will soon follow. Keywords: Agaricales, Fungariomics, Fungi, HybPiper, Museomics, Targeted capture sequencing, Whole genome sequencing
Kare Liimatainen, Jan T. Kim, Lisa Pokorny, Paul M. Kirk, Bryn Dentinger and Tuula Niskanen. 2022. Taming the Beast: A revised Classification of Cortinariaceae based on Genomic Data. Fungal Diversity. 112; 89–170. DOI: 10.1007/s13225-022-00499-9 | ||||||||||
| 3:51a | [Botany • 2022] Plagiostachys subsessiliflora & P. longipetiolata (Zingiberaceae) • Two New Species of Plagiostachys from Zamboanga Peninsula, Philippines
Abstract Two new species of Plagiostachys from Zamboanga Peninsula, Philippines, are described and illustrated. Plagiostachys subsessiliflora Mazo and Plagiostachys longipetiolata Mazo, both have non-mucilaginous inflorescences. A distribution map, proposed conservation assessment, and an updated key to Philippine Plagiostachys species are provided. Keyword: Alpinieae, IUCN, Plagiostachys escritorii, P. lourdesiae, P. strobilifera, taxonomy, Zamboanga
Plagiostachys subsessiliflora Mazo, sp. nov. Diagnosis: Plagiostachys subsessiliflora is allied to P. escritorii Elmer and P. lourdesiae in having a gullet-type labellum. However, it significantly differs in having unequally 2(–3)-lobed ligules, lanceolate leaves, short pedicels, and trilobed anther crest. Distribution and Habitat: Plagiostachys subsessiliflora occurs in semi-shaded of the municipality of Leon B. Postigo, Zamboanga del Norte, at 300–350 m elevation. It was observed growing on humus cover with fertile and moist soils near stream. Etymology: The epithet subsessiliflora refers to the very short stalk of the flowers.
Plagiostachys longipetiolata Mazo, sp. nov. Diagnosis: Plagiostachys longipetiolata is most similar to P. strobilifera var. strobilifera (Baker) Ridl. from Borneo, but differs significantly in having conspicuously petiolate lamina (6.8–8.0 cm long vs. sessile or subsessile), larger and emarginate ligules (4.5–6.0 mm vs. 3 mm, truncate), longer bracteoles (12–16 mm vs. 10 mm), and calyx tubes (13–15 mm vs. 10 mm), orbicular labellum (vs. ovate), and trilobed anther crest (vs. truncate). Distribution and Habitat: Plagiostachys longipetiolata is only known from the type locality in the secondary lowland tropical rainforest of the municipality of Leon B. Postigo, Zamboanga del Norte, Mindanao. It was found along the river with shaded environment at 410 m elevation. Etymology: The epithet longipetiolata refers to the long petioles of the leaf blades. Kean Roe F. Mazo. 2022. Two New Species of Plagiostachys (Zingiberaceae) from Zamboanga Peninsula, Philippines. Taiwania. 67(2); 186-194. DOI: 10.6165/tai.2022.67.186  |
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