identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
64389E585BC85DF9B7D5F039D77ED660.text	64389E585BC85DF9B7D5F039D77ED660.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Rubus semiplenus Huan C. Wang, Ming Hong Li & T. T. Wang 2025	<div><p>Rubus semiplenus Huan C. Wang, Ming Hong Li &amp; T. T. Wang sp. nov.</p><p>Figs 1, 2</p><p>Type.</p><p>China • Hunan Province: Nanyue Hengshan National Nature Reserve, Hengyang City, 20 April 2022, M. H. Li et al. HY 16383 (holotype: YUKU [YUKU 02074893]!; isotypes: YUKU [YUKU 02074894, YUKU 02074895, YUKU 02074896]!.)</p><p>Diagnosis.</p><p>Rubus semiplenus is most closely related to Rubus hirsutus Thunb., but clearly distinguished morphologically from the latter by its habit herbs or dwarf subshrubs (vs. shrubs in R. hirsutus), stems villous hairs (vs. soft and glandular hairs), leaves simple (vs. imparipinnate, 3–5 foliolate), suborbicular (vs. ovate or broadly ovate), sepals ovate-orbicular (vs. ovate-lanceolate or triangular-lanceolate), petals dicyclic, semi-doubled flowers, with 10–12 (vs. petals 5).</p><p>Description.</p><p>Herbs or dwarf subshrubs, 15–20 cm in height. Stem erect, terete, and branched. Branches and branchlets green, sparsely pilose and with minute prickles. Leaves simple. Stipules persistent, adnate to base of petiole, oblong-lanceolate, pilose, entire, 0.4–0.8 (– 1.0) cm long, 0.1–0.3 cm wide, apex acuminate. Petiole 0.3–2.0 cm long, pilose. Leaf blade suborbicular, 0.7–2.5 cm long, 0.7–2.5 cm wide, both surfaces pilose, lateral veins 5 pairs, base cordate, margin doubly serrate, apex rounded. Inflorescences terminal, 2–3 flowers forming a corymb; bracts oblong-lanceolate, pilose, apex acuminate. Pedicel 3.0– 4.5 cm long, densely pubescent. Flowers 2.0– 3.5 cm in diameter; calyx light green, pubescent or tomentose abaxially, densely tomentose adaxially; sepals 5, ovate-orbicular, 0.5–1.0 (– 1.2) cm long, 0.4–0.6 cm wide, entire, apex acuminate to caudate, spreading at anthesis, reflexed in fruit; petals semi-doubled, white, dicyclic, 10–12, ovate-orbicular or broadly ovate, longer than calyx, base shortly clawed; stamens straight, numerous, glabrous; filaments linear; pistils numerous, ca. 70–100, shorter than stamens; ovary villous at base. Aggregate fruit orange-red, subglobose, 0.5–0.7 cm in diameter, glabrous or sparsely pubescent.</p><p>Molecular phylogenetics.</p><p>The ITS, rbc L, and mat K sequence lengths of Rubus semiplenus are 699 bp, 1428 bp, and 1512 bp, respectively, with GC contents of 54.1 %, 43.0 %, and 32.5 %. Sequence alignment of the ITS dataset includes 65 sequences with 604 bp, among which 182 are parsimony-informative sites and 77 are singleton sites. The plastid (rbc L + mat K) dataset consists of 2078 aligned positions, including 125 parsimony-informative sites and 158 singleton sites. According to the Bayesian Information Criterion (BIC), the best-fit models for the ITS and rbc L + mat K datasets are TNe + R 3 and K 3 Pu + F + R 2, respectively.</p><p>The phylogenetic trees constructed using ITS and plastid (rbc L + mat K) sequences are largely congruent in topology. In the ITS phylogenetic tree (Fig. 3), the genus Rubus was clearly resolved into eight clades, which largely correspond to the subgenera delineated by Huang et al. (2023). Rubus semiplenus nests within clade E, representing subgenus Batothamnus (Focke) E. H. L. Krause, and belongs to a well-supported subclade I (BS = 99), which includes R. tsangii Merr., R. hirsutus Thunb., R. croceacanthus H. Lév., R. rosifolius Sm., R. sumatranus Miq and R. leucanthus Hance. Notably, except for R. leucanthus, the remaining five species in this subclade belong to the Sect. Rosaefolii as defined by Focke (1910 – 1914). Similar to the ITS phylogenetic tree results, in the rbc L + mat K phylogenetic tree (Fig. 4), R. semiplenus falls within clade D 1, also representing the subgenus Batothamnus, and clusters with R. hirsutus, R. rosifolius, R. illecebrosus Focke, R. croceacanthu s to form subclade G 1 with full support (BS = 100). All species in subclade G 1 belong to Focke’s Sect. Rosaefolii . Additionally, R. semiplenus is resolved as sister to R. hirsutus with moderate support (BS = 83).</p><p>Phenology.</p><p>Flowering from March to April, Fruiting from May to June.</p><p>Etymology.</p><p>The specific epithet “ semiplenus ” is derived from the Greek words “ semi ” (meaning half) and “ plenus ” (meaning double), which refer to this new species with semi-double flowers.</p><p>Habitat and distribution.</p><p>Rubus semiplenus is known only from the type locality in Nanyue Hengshan National Nature Reserve, Hengyang City, Hunan Province, China. This nature reserve belongs to a subtropical monsoon humid climate and includes many Chinese National Key Protected Plants, such as Ginkgo biloba L., Taxus wallichiana var. mairei (Lemée &amp; H. Lév.) L. K. Fu &amp; Nan Li, and Bretschneidera sinensis Hemsl. The new species mainly grows under the shrubs at an altitude of 800–900 meters.</p></div>	https://treatment.plazi.org/id/64389E585BC85DF9B7D5F039D77ED660	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Pensoft via Plazi	Wang, Ting-Ting;Li, Ming-Hong;Kuang, Dai-Yong;Xia, Jiang-Lin;Wang, Qiu-Ping;Wang, Huan-Chong	Wang, Ting-Ting, Li, Ming-Hong, Kuang, Dai-Yong, Xia, Jiang-Lin, Wang, Qiu-Ping, Wang, Huan-Chong (2025): Rubus semiplenus (Rosaceae), a new species with naturally occurring semi-double flowers from Hunan, China. PhytoKeys 257: 79-93, DOI: 10.3897/phytokeys.257.150519
