Mycetia saxicola (Rubiaceae), a new species with cauliflory from limestone areas in Yunnan, China, supported by morphological and molecular data

233 Mycetia saxicola (Rubiaceae), a new species with cauliflory from limestone areas in Yunnan, China, supported by morphological and molecular data Zhuqiu Song1, Buyun Zhang1, Xiaokai Xiong1, Dongxian Xu2 1 Key Laboratory of National Forestry and Grassland Administration on Plant Conservation and Utilization in Southern China, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China 2 Guangdong Academy of Forestry, Guangzhou 510520, China Corresponding author: Dongxian Xu ([email protected]) Copyright: © Zhuqiu Song et al. This is an open access article distributed under terms of the Creative Commons Attribution License (Attribution 4.0 International – CC BY 4.0). Research Article Abstract A new species exhibiting cauliflory within the tribe Argostemmateae (Rubiaceae), Mycetia saxicola Z.Q. Song & D.X. Xu, is described and illustrated from limestone areas in Yunnan, China. Our comprehensive study, which includes literature reviews, field and herbarium morphological observations, and molecular phylogenetic analyses of five plastid DNA regions, reveals that M. saxicola is closely related to M. fangii K.J. Yan & Z.Q. Song. Morphologically, both species share several key features, including cauliflorous inflorescences, few flowers per inflorescence, eglandular bracts and bracteoles, short corolla tubes, and calyx lobes much shorter than the corolla. However, M. saxicola can be readily distinguished from M. fangii by its limestone habitat, subcoriaceous leaves, linear stipules, very short pedicels and peduncles, and a calyx bearing two sessile, deciduous glands on each sinus. Additionally, this paper provides illustrations of six other relevant species of Mycetia to facilitate further taxonomic comparisons. Key words: Argostemmateae, cauliflory, limestone, Mycetia, taxonomy Introduction The coffee family (Rubiaceae) is the fourth-largest lineage of flowering plants, encompassing 586–615 genera and 14,181–14,266 species, which are classified into two subfamilies and 72 tribes (Razafimandimbison and Rydin 2024a, b; Verstraete et al. 2025). Among these, the subfamily Rubioideae comprises 30 tribes (Razafimandimbison and Rydin 2024a; Verstraete et al. 2025), one of which is Argostemmateae Bremek. ex Verdc. This tribe was validly established by Verdcourt (1958) based on morphological evidence and was subsequently redefined by Rydin et al. (2009), Ginter et al. (2015), Razafimandimbison and Rydin (2019), and Thureborn et al. (2022) using molecular data. The current concept of Argostemmateae is primarily supported by molecular evidence but appears to lack a clear morphological synapomorphy (Razafimandimbison and Rydin 2024a). Argostemmateae currently includes six genera: Argostemma Academic editor: Petra De Block Received: 17 October 2025 Accepted: 21 November 2025 Published: 8 December 2025 Citation: Song Z, Zhang B, Xiong X, Xu D (2025) Mycetia saxicola (Rubiaceae), a new species with cauliflory from limestone areas in Yunnan, China, supported by morphological and molecular data. PhytoKeys 267: 233–248. https://doi.org/10.3897/ phytokeys.267.175218 PhytoKeys 267: 233–248 (2025) DOI: 10.3897/phytokeys.267.175218 234 PhytoKeys 267: 233–248 (2025), DOI: 10.3897/phytokeys.267.175218 Zhuqiu Song et al.: Mycetia saxicola (Rubiaceae), a new species with cauliflory from China Wall., Clarkella Hook.f., Leptomischus Drake, Mouretia Pit., Mycetia Reinw., and Neohymenopogon Bennet (Razafimandimbison and Rydin 2024a). Historically, Myrioneuron R.Br. ex Hook.f. was accepted as a distinct genus by most botanists (Hooker 1880; Pitard 1923; Deb 1996; Lo 1999; Wright 1999; Chen and Taylor 2011). However, a recent molecular phylogenetic study has shown that Myrioneuron and Mycetia are intermixed, indicating that they do not form separate monophyletic groups (Ginter et al. 2015). Consequently, the two taxa have been merged into a single monophyletic genus, with Mycetia being accepted as the correct generic name (Ginter et al. 2015; Song and Xu 2016; Xu et al. 2016). The broadly delimited Mycetia is a medium-sized group comprising approximately 54 species distributed from South China through tropical Asia to the Northwest Pacific (Hassler 2025). It can be readily distinguished from the other five genera within the tribe Argostemmateae by its indehiscent berry-like fruits, which turn from green to white at maturity (Rydin et al. 2009; Ginter et al. 2015; Yan et al. 2016). Additionally, the straw-yellow corky bark on the upper part of the plant and calyx lobes bearing glands can serve as diagnostic features for identifying Mycetia species (Yan et al. 2016). Despite the distinct characteristics of Mycetia, a comprehensive taxonomic revision of the genus has not been completed (Chaturvedi et al. 2011; Yan et al. 2016; Bajan et al. 2017; Tandang et al. 2019; Vu et al. 2020; Bora et al. 2025). Within the genus, the position of the inflorescence is considered one of the most important characters for infrageneric classification (Ridley 1923; Fukuoka 1989; Yan et al. 2016). Yan et al. (2016) recognized 13 Mycetia species with cauliflorous inflorescences and provided a key to these species for the first time. In China, “Flora Reipublicae Popularis Sinicae” (Lo 1999) and “Flora of China” (Chen and Taylor 2011) recorded 15 Mycetia species and four Myrioneuron species. Recently, a new species, M. fangii K.J. Yan & Z.Q. Song, was described from Guangxi (Yan et al. 2016), while M. coriacea (Dunn) Merr. was transferred by Song and Xu (2016) to Foonchewia R.J. Wang of the tribe Foonchewieae R.J. Wang. As a result, a total of 19 species are now recorded in China, including four species with cauliflorous inflorescences. During a collecting trip to Yunnan, South China, we discovered an interesting cauliflorous Mycetia species in a limestone forest. Through detailed morphological comparisons with relevant species and phylogenetic analyses of five plastid DNA regions, we confirmed that this plant represents a previously undescribed species. Here, we provide a full description and name for this new species. Materials and methods Morphological studies We conducted morphological studies on all available specimens of Mycetia housed in the herbaria BKF, BM, BO, CANT, GXMI, HITBC, IBK, IBSC, K, E, NY, MO, US, PE, and SYS by visiting these herbaria. We also examined the images of some specimens deposited in the herbaria A, BISH, GH, L, MICH, SING, and U. Acronyms for these herbaria are consistent with the Index Herbariorum (Thiers 2025). Over the past four years, we have conducted extensive field investigations and observed the morphological characteristics of most Chinese Mycetia species. 235 PhytoKeys 267: 233–248 (2025), DOI: 10.3897/phytokeys.267.175218 Zhuqiu Song et al.: Mycetia saxicola (Rubiaceae), a new species with cauliflory from China Conservation status assessment Based on the IUCN (2024) criteria, we conducted a preliminary evaluation of the conservation status of the new species described here. Phylogenetic analyses To elucidate the phylogenetic relationships of the new species with other taxa within the tribe Argostemmateae, we reconstructed a molecular phylogeny of the tribe using five plastid DNA regions (atpB-rbcL, ndhF, rbcL, rps16, and trnTF). This analysis was based on the framework established by a previous study (Rydin et al. 2009). Our dataset included 42 species from eight genera, covering all six genera of Argostemmateae. Notably, Mycetia was represented by 35 samples from 25 species, with 14 species newly sequenced in this study (see Suppl. material 1). The remaining sequences were sourced from GenBank (www.ncbi.nlm.nih.gov/genbank). For the new samples, total DNA was extracted from silica gel-dried leaves using a modified CTAB method (Doyle and Doyle 1987). Plastid sequences were obtained using a genome skimming approach (Zeng et al. 2018). Paired-end (PE) sequencing was performed on an Illumina HiSeq X Ten instrument at the Beijing Genomics Institute (BGI) in Wuhan, China. Subsequently, the sequences were assembled using GetOrganelle (Jin et al. 2020), annotated by PGA (Qu et al. 2019), and checked with Geneious v11.0.4 (Kearse et al. 2012). For annotation, Dunnia sinensis Tutcher (GenBank number: MN883829) was used as the reference. Each of the five plastid DNA matrices was individually aligned using MAFFT v7.490 (Katoh and Standley 2013) with the L-INS-i algorithm. The alignments were subsequently trimmed using trimAl v1.5 (Capella-Gutiérrez et al. 2009) with the “automated1” setting to eliminate poorly aligned or unreliable regions. In each trimmed alignment, gaps (“-”) at the leading and trailing positions were coded as missing data (“?”). The plastid regions were then concatenated into a combined dataset (Suppl. material 2), which contained 6,687 columns and 496 parsimony-informative sites. Maximum likelihood (ML) analysis was performed using IQ-TREE v3.0.1 (Nguyen et al. 2015) to reconstruct the phylogenetic tree. In IQ-TREE, the best substitution model was identified using ModelFinder (Kalyaanamoorthy et al. 2017) with the parameter “-m MFP” according to the Bayesian information criterion (BIC), and the TVM+F+R2 model was chosen. To assess the reliability of the phylogenetic tree, we used the Shimodaira–Hasegawa (SH-aLRT) approximate likelihood ratio test and the ultrafast bootstrap (UFboot) approximation, with parameters set at “-alrt 1000 -bb 1000.” Clades were considered well supported if they exhibited an SH-aLRT value of 80% or greater and a UFboot value of 95% or greater. Results Morphological studies Our morphological study revealed that the plant species discovered in limestone forests in Yunnan exhibits a suite of highly distinctive features. These include a limestone habitat (Fig. 1A), subcoriaceous leaves (Fig. 1B, D), straw-yel- 236 PhytoKeys 267: 233–248 (2025), DOI: 10.3897/phytokeys.267.175218 Zhuqiu Song et al.: Mycetia saxicola (Rubiaceae), a new species with cauliflory from China Figure 1. Mycetia saxicola Z.Q. Song & D.X. Xu. A. Habitat; B. Individual plant with cauliflorous infrutescences; C. Part of stem, bark green at the apical part and turning straw-yellow and corky at the upper part; D. Leaves in abaxial view; E. Uppermost stipule pair; F. Stipule in the upper part of the plant; G. Cauliflorous inflorescence; H. Single flower in lateral view; I. Calyx, arrows showing glands on the sinuses; J. Long-styled flower; K. Short-styled flower; L. Long-styled flowers, corolla partly removed; M. Short-styled flowers, corolla longitudinally slit on the right flower; N. Immature fruit in lateral view; O. Calyx, arrows showing glands on the sinuses; P. Cauliflorous infrutescences with immature and mature fruits; Q. Longitudinally (upper) and transversely (lower) opened mature fruits with numerous black seeds. Photos by Z.Q. Song (A–F, N–Q), B.Y. Zhang (H), and X.K. Xiong (G, I–M.). 237 PhytoKeys 267: 233–248 (2025), DOI: 10.3897/phytokeys.267.175218 Zhuqiu Song et al.: Mycetia saxicola (Rubiaceae), a new species with cauliflory from China low corky bark on the upper part of the plant (Fig. 1C), linear stipules (Fig. 1E, F), cauliflorous inflorescences (Fig. 1B, G), a very short peduncle (1–2 mm long or absent; Fig. 1B, G, N), yellow heterodistylous flowers (long-styled flowers: Fig. 1J, L; short-styled flowers: Fig. 1K, M), very short pedicels (ca. 1.5 mm long; Fig. 1B, G, H, N, P), a short corolla tube (ca. 3.5 mm long; Fig. 1G, H, L, M), short calyx lobes bearing two sessile deciduous glands on each sinus (Fig. 1I, O), and 2-chambered berry-like fruits with numerous small, black seeds (Fig. 1Q). These features collectively indicate that this species is a unique member of the genus Mycetia. The cauliflorous nature and limestone habitat are the most significant features of this species. Comparisons of the species with two related species are documented in Table 1. We compared this taxon with all other congeneric species, particularly those with cauliflorous inflorescences and those growing in limestone habitats, by examining relevant literature, studying specimens, and observing living plants. Among these species, four Chinese species with cauliflory are illustrated in Table 1. Comparison between Mycetia saxicola, M. fangii, and M. brevisepala. Character Mycetia saxicola Mycetia fangii Mycetia brevisepala Petiole 1.5–4 cm long 1–3(–5) cm long 0.2–1 cm long Leaf texture stiff chartaceous or subleathery membranous to chartaceous thinly leathery to papery Leaf blade 9–22 × 3–8 cm (4–)10–23 × (1–)3–6 cm 6–18 × 2.5–6 cm Leaf shape narrow elliptic or lanceolate, cuneate at base, gradually long acuminate at the apex narrow elliptic or lanceolate, cuneate at base, gradually long acuminate at the apex elliptic-oblong, elliptic, obovate, or oblonglanceolate, base cuneate to obtuse, apex acuminate Leaf hairiness glabrous on both surfaces glabrous on both surfaces adaxially glabrous, abaxially glabrescent or densely puberulent to hispidulous on principal veins Leaf lateral nerves 9–11 pairs 8–12 pairs 7–12 pairs Stipule shape linear, acute at the apex ovate to suborbicular, obtuse at the apex narrowly triangular, acute at the apex Stipule size 4–6 × 1–2 mm 5–15 × 3–10 mm 3–6 mm × 1–2 mm Stipule texture subscarious foliaceous subscarious Inflorescence position cauliflorous cauliflorous and axillary terminal and cauliflorous Peduncle length 1–2 mm long 7–14 mm long 10–20 mm long Bracts and bracteoles lanceolate, ca. 1 mm long lanceolate or ovate, 1–2 mm long narrowly triangular to lanceolate, 1–3 mm long Pedicel length ca. 1.5 mm long 4–8(–10) mm long 9–20 mm long Flower number usually less than 6 usually less than 10 9–25 Calyx lobes deltoid-lanceolate, ca. 1.5 mm long, ca. 1 mm wide at base deltoid-lanceolate, ca. 2 mm long, ca. 1 mm wide at base triangular to narrowly triangular, 0.8–1 mm long Calyx glands two sessile glands in each sinus one short gland in each sinus, 0.4–0.6 mm long two sessile glands in each sinus Corolla tube ca. 3–4 mm long ca. 5 mm long ca. 5 mm long Corolla lobes deltoid-ovate, acute, ca. 1.5 mm long, recurved deltoid-ovate, acute, ca. 1.5 mm long, recurved deltoid-ovate, acute, recurved Corolla hairiness subglabrous outside glabrous outside glabrous outside Fruit size 6–7 mm in diameter 6–7 mm in diameter 3.5–4 mm in diameter Flowering August to September July to October August to September Fruiting September to February October to December December Habitat limestone forest non-limestone forest non-limestone forest Distribution China (Yunnan) China (Guangxi) China (Yunnan) and northern Vietnam 238 PhytoKeys 267: 233–248 (2025), DOI: 10.3897/phytokeys.267.175218 Zhuqiu Song et al.: Mycetia saxicola (Rubiaceae), a new species with cauliflory from China Fig. 2, including M. fangii (Fig. 2A–E), M. gracilis Craib (Fig. 2F–I), M. brevisepala H.S. Lo (Fig. 2J–L), and M. yunnanica H.S. Lo (Fig. 2M–P). Two species adapted to limestone habitats are illustrated in Fig. 3, including M. macrocarpa F.C. How ex H.S. Lo (Fig. 3A–F) and M. anlongensis H.S. Lo (Fig. 3G–L). These morphological studies have enabled us to confirm that the newly collected taxon represents a previously undescribed species, which we have named Mycetia saxicola Z.Q. Song & D.X. Xu. Phylogenetic relationships The phylogenetic tree derived from maximum likelihood (ML) analyses of the combined dataset of five plastid DNA regions (atpB-rbcL, ndhF, rbcL, rps16, and trnTF) is shown in Fig. 4. The species of the tribe Argostemmateae formed a strongly supported monophyletic group (SH-aLRT = 92.2%, UFBoot = 98%). Within Argostemmateae, four genera with multiple samples (Argostemma, Mouretia, Neohymenopogon, and Mycetia) were also found to be monophyletic. Leptomischus was shown to be sister to the other five genera. Within the genus Mycetia, the single species Mycetia brevipes F.C. How ex H.S. Lo, endemic to northwestern Yunnan, was revealed to be sister to all other congeneric species. Notably, the new species described here, Mycetia saxicola, was found to be most closely related to Mycetia fangii, with high support values (SH-aLRT = 99.4%, UFBoot = 100%). Discussion Phylogenetic relationships Our molecular phylogenetic analysis based on plastid data elucidated the phylogenetic relationships of all six genera of the tribe Argostemmateae. Leptomischus and Mouretia were supported as successive sisters to the other four genera. This finding is similar to the results of three previous studies that utilized plastid data (Rydin et al. 2009; Ginter et al. 2015; Villanueva et al. 2016). These three studies, which did not include species of Leptomischus and Clarkella, found Mouretia to be the sister genus to the other three genera. However, our plastid-based results (Fig. 4) are in contrast to the recent findings from analyses of 353 nuclear genes by Thureborn et al. (2022), which did not sample any species of Leptomischus and revealed that Mouretia is most closely related to Mycetia, with Argostemma being the sister genus to the other four sampled genera. For the genus Mycetia, we successfully obtained DNA samples from 25 species (approximately 46% of the whole genus), including those previously classified under Myrioneuron [e.g., Myrioneuron faberi Hemsl. ex F.B. Forbes & Hemsl., now recognized as Mycetia faberi (Hemsl. ex F.B. Forbes & Hemsl.) Razafim. & B. Bremer; Ginter et al. 2015]. Our analysis confirmed that Mycetia and Myrioneuron together formed a well-supported monophyletic group, thereby supporting the prior inclusion of Myrioneuron within Mycetia (Ginter et al. 2015). Within the broadened Mycetia, we discovered that the Himalayan species M. brevipes is the sister species to all other sampled congeners. Moreover, our molecular phylogenetic analyses distinctly highlighted the close relationship between M. fangii and the newly described species M. saxicola, the former being endemic to Guangxi Province, China (Yan et al. 2016). 239 PhytoKeys 267: 233–248 (2025), DOI: 10.3897/phytokeys.267.175218 Zhuqiu Song et al.: Mycetia saxicola (Rubiaceae), a new species with cauliflory from China Figure 2. Mycetia species exhibiting cauliflory. A–E. Mycetia fangii K.J. Yan & Z.Q. Song; F–I. Mycetia gracilis Craib; J–L. Mycetia brevisepala H.S. Lo; M–P. Mycetia yunnanica H.S. Lo. A. Habitat; B. Leaves in adaxial view; C. Stipule; D. Cauliflorous infrutescences; E. Calyx, arrows showing glands on the sinuses; F. Branch with terminal inflorescence; G. Stipule; H. Cauliflorous inflorescence; I. Calyx, arrows showing glands on the sinuses; J. Branch with terminal inflorescence; K. Cauliflorous inflorescence; L. Dissection of flower; M. Habit; N. Stipules; O. Part of inflorescence, arrows showing glands on the bracts; P. Pseudo-axillary infrutescence, showing glands on the fruit calyx in the red circle. Photos by Z.Q. Song. 240 PhytoKeys 267: 233–248 (2025), DOI: 10.3897/phytokeys.267.175218 Zhuqiu Song et al.: Mycetia saxicola (Rubiaceae), a new species with cauliflory from China Morphological comparisons Morphologically, the new species Mycetia saxicola closely resembles M. fangii in several key features, including the cauliflorous inflorescences, few flowers per inflorescence (usually less than 10), eglandular bracts and bracteoles, small flowers (about 5–8 mm long), and calyx lobes much shorter than the corolla. However, M. saxicola can be readily distinguished from M. fangii by its limestone habitat (Fig. 1A; vs. non-limestone habitat, Fig. 2A), subcoriaceous leaves (Fig. 1B; vs. membranous to chartaceous, Fig. 2B), linear stipules (Fig. 1E, F; vs. ovate to suborbicular, Fig. 2C), very short floral pedicels (ca. 1.5 mm long; Fig. 1L, M; vs. 4–10 mm long, Fig. 2D), and calyx bearing two sessile deciduous glands on each sinus (Fig. 1I, O; vs. calyx bearing one 0.4–0.6 mm long gland in each sinus, Fig. 2E). Regarding the position of the inflorescence, Robbrecht (1988) identified four types within the tropical woody Rubiaceae: terminal, axillary, pseudo-axillary, and cauliflorous. Notably, the cauliflorous inflorescence is considered rare in the family. Yan et al. (2016) documented 13 Mycetia species exhibiting cauliflory worldwide. Different from all these species, M. saxicola has a very short peduncle (1–2 mm long or absent), short floral pedicels (ca. 1.5 mm long), and a short corolla tube (ca. 3.5 mm long). In contrast, the other species with cauliflory within Mycetia have a long peduncle (e.g., up to 7 cm long in M. basiflora Puff, 3 cm long in M. yunnanica H.S. Lo, and 1–2 cm long in M. brevisepala H.S. Lo), long floral pedicels (e.g., 9–15 mm long in M. gracilis Craib, 6–27 mm long in M. cauliflora Reinw., and 4–10 mm long in M. fangii), or an 8 mm or longer corolla tube [e.g., M. mukerjiana Deb & R.M. Dutta, M. radiciflora (C.B. Clarke) Airy Shaw, M. brachybotrys Merr., M. flava (Ridl.) Ridl., and M. fasciculata (Blume) Blume ex Korth.]. Among these, several species also possess terminal inflorescences in addition to their cauliflorous ones, such as M. cauliflora, M. gracilis (Fig. 2F, H), and M. brevisepala (Fig. 2J, K). In fact, terminal inflorescences are more common in these species. Field observations revealed that certain species develop pseudo-axillary infrutescences (not truly cauliflorous), which are derived from terminal inflorescences. This occurs when a new shoot emerges from the axil of the most apical leaf following flowering (Robbrecht 1988), as seen in M. yunnanica (Fig. 2M, P). These pseudo-axillary infrutescences were previously misinterpreted as cauliflorous. In the molecular analysis, our phylogenetic results indicate that the cauliflorous inflorescence likely evolved independently at least twice (see Fig. 4). To date, only two Chinese species, M. fangii and the newly described M. saxicola, lack terminal inflorescences and have only cauliflorous ones. This shared feature further supports their close phylogenetic relationship. In their native habitat, Mycetia species are typically found in dense evergreen forests and moist environments, particularly along stream banks (Fukuoka 1989; Lo 1999; Chen and Taylor 2011; Yan et al. 2016; Bajan et al. 2017; Bora et al. 2025). Only a few species are adapted to drought-resistant limestone habitat, including M. macrocarpa (Fig. 3A) and M. anlongensis (Fig. 3G). Both species are endemic to China, with M. macrocarpa occurring exclusively in limestone forests and M. anlongensis sometimes found in non-limestone forests. Mycetia macrocarpa exhibits subcoriaceous leaves similar to those of the new species M. saxicola. Our phylogenetic analysis shows a relatively close relationship between these two species, with M. macrocarpa being resolved as the sister 241 PhytoKeys 267: 233–248 (2025), DOI: 10.3897/phytokeys.267.175218 Zhuqiu Song et al.: Mycetia saxicola (Rubiaceae), a new species with cauliflory from China Figure 3. Two Mycetia species adapted to limestone habitat. A–F. Mycetia macrocarpa F.C. How ex H.S. Lo; G–L. Mycetia anlongensis H.S. Lo. A. Habitat; B. Individual with terminal inflorescence; C. Stipule; D. Flowers; E. Calyx, arrows showing glands on the sinuses; F. White berry-like fruits; G. Habitat; H. Membranous leaves covered with villosulous hairs; I. Terminal inflorescence; J. Stipule; K. Flowers; L. Calyx, arrows showing glands on the sinuses. Photos by Z.Q. Song. 248 PhytoKeys 267: 233–248 (2025), DOI: 10.3897/phytokeys.267.175218 Zhuqiu Song et al.: Mycetia saxicola (Rubiaceae), a new species with cauliflory from China Supplementary material 1 Voucher information for the DNA samples in the present study Authors: Zhuqiu Song, Buyun Zhang, Xiaokai Xiong, Dongxian Xu Data type: xlsx Copyright notice: This dataset is made available under the Open Database License (http://opendatacommons.org/licenses/odbl/1.0/). The Open Database License (ODbL) is a license agreement intended to allow users to freely share, modify, and use this Dataset while maintaining this same freedom for others, provided that the original source and author(s) are credited. Link: https://doi.org/10.3897/phytokeys.267.175218.suppl1 Supplementary material 2 Concatenated dataset of five plastid DNA regions (atpB-rbcL, ndhF, rbcL, rps16, and trnTF) Authors: Zhuqiu Song, Buyun Zhang, Xiaokai Xiong, Dongxian Xu Data type: fasta Copyright notice: This dataset is made available under the Open Database License (http://opendatacommons.org/licenses/odbl/1.0/). The Open Database License (ODbL) is a license agreement intended to allow users to freely share, modify, and use this Dataset while maintaining this same freedom for others, provided that the original source and author(s) are credited. Link: https://doi.org/10.3897/phytokeys.267.175218.suppl2 Supplementary material 3 Holotype of Mycetia saxicola Z.Q.Song & D.X.Xu Authors: Zhuqiu Song, Buyun Zhang, Xiaokai Xiong, Dongxian Xu Data type: jpg Copyright notice: This dataset is made available under the Open Database License (http://opendatacommons.org/licenses/odbl/1.0/). The Open Database License (ODbL) is a license agreement intended to allow users to freely share, modify, and use this Dataset while maintaining this same freedom for others, provided that the original source and author(s) are credited. Link: https://doi.org/10.3897/phytokeys.267.175218.suppl3