Abstract
Ligulariamonocephala, a remarkable new species from Hubei, China, is described and illustrated. It is readily distinguishable in the whole genus by character combination of the reniform to cordate-reniform leaf blades which are palmately-pinnately veined and abaxially purplish red, the solitary and erect capitula, and the pappus which are as long as or slightly longer than tube of the tubular corolla. A detailed description and distribution map of the species are also presented herein.
Highlights
Ligularia Cass., as the largest genus of tribe Senecioneae in Asteraceae in China, consists of approximately 130 species distributed mainly in eastern Asia (Liu 1989; Liu et al 1994; Nordenstam 2007; Nordenstam et al 2009; Liu and Illarionova 2011; Guo and Wang 2021)
We critically examined physical or digitalized herbarium specimens with high-resolution of the genus Ligularia at A, BM, CDBI, CSFI, E, GH, HIB, HITBC, HNWP, IBSC, JIU, K, KATH, KUN, LE, NAS, NY, P, PE, S, SZ, W, WU, and WUK (acronyms follow Thiers (2021))
The generic placement of this newly described taxon, which is superficially similar to some species of Cremanthodium in the general habit
Summary
Ligularia Cass., as the largest genus of tribe Senecioneae in Asteraceae in China, consists of approximately 130 species distributed mainly in eastern Asia (Liu 1989; Liu et al 1994; Nordenstam 2007; Nordenstam et al 2009; Liu and Illarionova 2011; Guo and Wang 2021). During a field expedition in August 2016 to Shennongjia, Hubei, China, the second author was able to discover a unique Ligularia population in an alpine region of this area. To precisely decide the identity of these gatherings, we conducted another two field investigations to Shennongjia in September, 2020 and August, 2021, respectively, leading to a better understanding of the variation range of several main morphological characters of this plant. We concluded that this plant represents a hitherto undescribed species, which we describe below
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