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Sinosenecio pingwuensis sp. nov. in the wild (China, Sichuan province, Pingwu county, the type locality) A roots B portion of stem C radical leaves (adaxial side) D radical leaves (abaxial side) E radical leaf (left: adaxial side; right: abaxial side) F bracts on the scape G close-up of capitulum H capitulum (lateral view) and portion of scape I capitulum (top view) J phyllaries (adaxial side) K phyllaries (abaxial side) L ray florets M disc florets. Photographed by W.Q. Fei.
Source publication
Sinosenecio pingwuensis (Asteraceae, Senecioneae), a new species from Pingwu county in northern Sichuan, China, is described and illustrated. This species is distinguished in Sinosenecio by having leathery, glabrous, ovate or ovate-oblong leaves often pinnately-veined and solitary capitula 2.3–4.3 cm in diameter, a unique character combination hith...
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Synotis jinpingensis (Asteraceae, Senecioneae), a new species from Jinping county in southeastern Yunnan province, China, is described and illustrated. This species is distinguished by having white ray florets in the genus Synotis, in which only species with yellow ray florets have been hitherto known. In habit and leaf shape S. jinpingensis is mos...
Citations
... The genus Sinosenecio B. Nordenstam is a group of perennial or sometimes annual or biennial herbs in the tribe Senecioneae of the family Asteraceae, containing about 47 species mainly distributed in the central and southwestern regions of China (Liu 2010;Liu and Yang 2011;Liu et al. 2019;Zou et al. 2020;Chen et al. 2022;Peng et al. 2022a;Su et al. 2023aSu et al. , 2023b. Previous studies based on Figure 1. ...
The genus Sinosenecio B. Nordenstam is a group of perennial or sometimes annual or biennial herbs in the family Asteraceae. Here, we have successfully assembled and characterized the complete chloroplast (cp) genome of S. globigerus, which shows a typical quadratic structure with an overall GC content of 37.4%, comprising a pair of inverted repeat regions (IRs) of 24,848 bp, a large single-copy region (LSC) of 83,379 bp and a small single-copy region (SSC) of 18,180 bp. 133 genes were annotated, including 88 protein-coding genes, 37 tRNA genes and eight rRNA genes. Further nucleotide diversity analysis indicated that three genomic regions (accD-psaI, trnK-rps16, and ycf1) exhibited sufficient variability and thus could be recommended as valuable barcodes for the delimitation and identification of Sinosenecio species. Phylogenetic reconstruction presented clear interspecific relationships within Sinosenecio, which were supported to some extent by cytology, morphology and geographic distributions. Our study will provide valuable and high-quality genetic information to further elucidate the diversified mechanisms in Sinosenecio.
... Notes. The genus Sinosenecio as defined by Chen et al. (2011) encompasses two major groups of species, with one having strictly polar anther endothecial cell wall thickenings and base chromosome number of x = 30 and occurring in mountainous areas largely surrounding the Sichuan basin in south-western China and the other having polar and radial thickenings and base chromosome number of x = 24 (rarely 13) and largely occurring in mountainous areas in central and southern China (Liu 2010;Chen et al. 2011;Liu andYang 2011a, b, 2012;Liu et al. 2019;Zou et al. 2020;Chen et al. 2022;Peng et al. 2022;Su et al. 2023). Obviously, S. minshanicus belongs to the first group, in which 15 species are currently recognised, including S. homogyniphyllus (Cumm.) ...
... Obviously, S. minshanicus belongs to the first group, in which 15 species are currently recognised, including S. homogyniphyllus (Cumm.) B. Nord., the type species of Sinosenecio and S. rotundifolius, the putative closest ally of S. minshanicus (Liu 2010;Chen et al. 2011;Chen et al. 2022;Su et al. 2023). In this group, S. minshanicus is the only species hitherto known to have slender stolons. ...
... Sinosenecio minshanicus occurs in the same valley together with another species of the same group in the genus, i.e. S. pingwuensis Xiu J. Su et al. (Su et al. 2023). Both of them prefer shaded and moist microhabitat and share the same flowering time (June). ...
Sinosenecio minshanicus (Asteraceae, Senecioneae), a new species from south-eastern Gansu (Wenxian and Zhugqu counties) and northern Sichuan (Pingwu county), China, is described and illustrated. This species is similar to S. rotundifolius , a species locally endemic to Songpan county in northern Sichuan, in having a scapigerous habit, orbicular leaves and solitary capitula, but differs by the presence (vs. absence) of stolons and by having thinner rhizomes (ca. 2 mm vs. more than 5 mm in diameter), stems proximally sparsely fulvous arachnoid or glabrescent (vs. densely sericeous-villous) and obscure (vs. conspicuous) main veins on adaxial surface of leaves. The chromosome number of the new species is reported to be 2 n = 60. Colour photographs of living plants in the wild and a distribution map are provided for the new species and S. rotundifolius . The geographical distribution of S. rotundifolius is also corrected, with the previous record of this species from south-eastern Gansu (Wenxian county) actually referring to S. minshanicus .
