High on the gravelly slopes and alpine meadows around Mount Qomolangma, better known to much of the world as Mount Everest, botanists have identified a plant that does not match any previously described species. The plant, now formally named Melanoseris zhufengensis, is a small perennial herb in the daisy family Asteraceae, standing just 20 to 26 centimetres tall with purplish-pink flower heads that each carry only five florets. Its description, published in the journal PhytoKeys, rests on a combination of careful field observation, scanning electron microscopy of its fruits, and DNA sequences from one nuclear and four plastid markers.
The name zhufengensis refers to Mount Zhufeng, the Chinese name for Qomolangma, since the type locality lies within the Qomolangma National Nature Reserve in the Central Himalaya of Xizang, China. The species is currently known only from Qudang Town in Tingri County, Shigatse City, where it grows at elevations of roughly 3,600 to 3,650 metres. The holotype was collected there on 14 August 2023 at 3,610 metres, and a second specimen was gathered in July 2024 from nearby Renqinglin Village. Flowering and fruiting occur from July to September, a narrow window in the short alpine growing season.
Melanoseris is a genus with a tangled taxonomic history. It was established in 1844 to accommodate two Himalayan species, but the name then fell into disuse for more than 165 years until it was reinstated in the Flora of China treatment, guided by early molecular phylogenetic results. Before that revision, species now placed in Melanoseris had been scattered across several allied genera, including Lactuca, Cicerbita, Mulgedium, Cephalorrhynchus, Prenanthes, Chaetoseris and Stenoseris, producing persistent confusion over species limits and relationships. Later phylogenetic analyses using nuclear ITS sequences and multiple plastid DNA markers confirmed the genus as a monophyletic group and as the most species-rich lineage of the subtribe Lactucinae within China.
Today, roughly 30 Melanoseris species are recognised across the Pan-Himalayan biodiversity hotspot. The genus presents a genuine challenge for taxonomists: it shows extensive morphological variation and plasticity, so different species frequently overlap in their visible traits, particularly within Himalayan populations. This is precisely why the authors of the new study turned to integrative taxonomy, combining morphological data with multi-locus molecular evidence, an approach that previous work on the genus has shown to be critical for resolving species boundaries and documenting phylogenetic incongruence.
The diagnostic features of the new species are distinctive once laid out. Melanoseris zhufengensis is caespitose, forming dense tufts, with stems that branch profusely from the base. Its middle cauline leaves are sessile, clasping the stem with broad, unconstricted basal wings. The phyllaries, the bracts that enclose the flower head, are moderately white-pilose, meaning hairy, along the midvein on their outer surface. Its achenes, the one-seeded fruits typical of the daisy family, are comparatively long at 9.5 to 10.6 millimetres, bear three markedly broadened lateral ribs on each surface, and taper into a slender beak 3.1 to 3.8 millimetres long.
Each of these characters separates the new species cleanly from its two closest relatives, M. violifolia and M. rapunculoides, which share the unusual trait of five florets per capitulum. Both allied species have solitary stems branched only toward the apex, petiolate middle leaves with constricted leaf-base wings, and glabrous or subglabrous phyllary midveins. Their achenes are shorter, at 6.5 to 9 millimetres in M. rapunculoides and 6 to 7 millimetres in M. violifolia, with lateral ribs only weakly broadened, and M. violifolia lacks an achene beak altogether, its fruit ending in a truncate apex.
Scanning electron microscopy added a further layer of discrimination. The achene epidermis of M. zhufengensis is smooth, whereas both of its sympatric allies show papillate, bumpy epidermal surfaces and lack prominently broadened lateral ribs. Within the tribe Cichorieae, achene macro- and micromorphology has proven evolutionarily conservative and taxonomically diagnostic, and earlier Melanoseris studies demonstrated that even vegetatively similar species can be reliably separated by fruit microsculpturing. The smooth achene surface of the new species therefore provides complementary, independent evidence for its status as a distinct species.
The molecular work reinforced this conclusion. The researchers amplified and sequenced nuclear ITS and four plastid loci, petD, trnL-F, rpl32-trnL and trnQ-rps16, from two individuals of the new species collected in Dingri, Xizang, and analysed them alongside published data. The nrITS matrix comprised 43 ingroup and four outgroup taxa across 654 aligned columns, while the combined plastid matrix contained 37 ingroup taxa spanning 3,788 aligned columns. Maximum likelihood and Bayesian analyses produced highly congruent topologies for each dataset, and both recovered Melanoseris as a fully supported monophyletic genus with bootstrap support of 100 and posterior probability of 1.00.
Both accessions of M. zhufengensis formed a robust monophyletic lineage, supported at bootstrap 94 and posterior probability 1.00 in the nrITS tree and bootstrap 99 and posterior probability 1.00 in the plastid tree. The species nested within a subclade, Clade D1 in the nuclear tree and Clade 2 in the plastid tree, together with M. violifolia, M. rapunculoides and M. macrorhiza, confirming their close affinity. The sister relationships within this group shifted between datasets: in the nrITS tree the new species was sister to two M. violifolia accessions, while in the plastid tree it paired with M. rapunculoides. Such nuclear-plastid incongruence is widespread in Himalayan Melanoseris and is most plausibly attributed to reticulate evolution and chloroplast capture, processes well documented in the genus, including the putative hybrid origin of M. jilongensis, a species described earlier by the same research team.
The discovery underscores how much remains undocumented in the remote alpine habitats of southern Xizang, where the authors note that some taxa remain undiscovered or insufficiently characterised. Three other new Melanoseris species have been formally published by the team in recent years, from southwestern Xizang, western Sichuan and north-central Yunnan, and M. zhufengensis now adds a fourth, named for the world’s highest mountain. For a genus in which convergent selection in alpine environments conserved vegetative and floral morphology while evolutionary reticulation scrambled genetic signals, the combination of molecular phylogenetics with conservative achene micromorphology offers a robust framework for resolving cryptic species boundaries, and a reminder that even well-visited landscapes can still yield species new to science.
Subject of Research: Integrative taxonomic description of a new Himalayan plant species
Article Title: Melanoseris zhufengensis ( Asteraceae , Cichorieae , Lactucinae ), a new species from the Central Himalaya, Xizang, China
Article References: Yan, L., Yang, Y., Ye, C.-X., Tang, M., Sun, Q.-W., & Wang, Z.-H. (2026). Melanoseris zhufengensis (Asteraceae, Cichorieae, Lactucinae), a new species from the Central Himalaya, Xizang, China. PhytoKeys, 281, 39-51. https://doi.org/10.3897/phytokeys.281.215554
Image Credits: AI Generated
DOI: 10.3897/phytokeys.281.215554
Keywords: Melanoseris zhufengensis, Asteraceae, new species, Himalaya, Xizang, phylogenetics, integrative taxonomy, achene micromorphology, Mount Qomolangma, Lactucinae, Melanoseris, zhufengensis
News Source: Margaret Porter. (October 29, 2026). New daisy relative discovered on Mount Everest’s slopes named after Zhufeng. Scienmag.
