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New Synonymy and Taxonomic Changes in the Labiatae

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Abstract

Several new combinations and new synonomies are made affecting the following genera of Labiatae: Keiskea, Collinsonia, Chingyungia, Perrierastrum, Plectranthus, Nepeta and Pitardia. In addition, subtribe Hanceolinae (tribe Ocimeae) is recognized. This includes Isodon, Hanceola and Siphocranion.
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... In the molecular phylogenetic study of Nepetoideae by Wagstaff & al. (1995), tribe Elsholtzieae was represented by Elsholtzia, Collinsonia, and Perilla and formed a well-supported clade. Based on the morphological similarities between Collinsonia and Keiskea, Harley & al. (2003 treated Keiskea as a synonym of Collinsonia. Peirson & al. (2003) explored the phylogeny of Elsholtzieae using the nrITS region and showed that Collinsonia was sister to the clade formed by Keiskea and Perilla, while Elsholtzia was sister to all three genera. ...
... Representatives of all seven genera were sampled, and we included Mosla and the two monotypic genera Ombrocharis and Perillula, none of which had been included in previous molecular phylogenetic analyses. We did not adopt the treatment of Keiskea in Harley & al. (2003 but retained its generic status as in Cantino & al. (1992). ...
... Regarding the relationship between the eastern North American Collinsonia and eastern Asian Keiskea, our results do not support the treatment of Harley & al. (2003. Here, Keiskea is shown to be more closely related to either Perilla (Fig. 4) or the Mosla-Perilla clade (Fig. 5) than to Collinsonia. ...
Article
Ombrocharis is the only incertae sedis genus within Lamiaceae that has not been included in a published molecular phylogenetic study. Here, we adopt a two-step approach to resolve the phylogenetic placement of the genus. Initially, the subfamilial affiliation of Ombrocharis was determined based on a combined ndhF and rbcL dataset covering all seven subfamilies of Lamiaceae. Results show that Ombrocharis is a member of Nepetoideae, a placement that is also supported by its hexacolpate pollen grains. In the second set of analyses, two nrDNA (ITS, ETS) and four cpDNA (ycf1, rps15-ycf1, trnL-F, rpl32-trnL) markers were used to explore the position of Ombrocharis w ithin Nepetoideae. O ur results demonstrate t hat Ombrocharis and another monotypic genus, Perillula, form a clade that is sister to the remaining genera of tribe Elsholtzieae. Ombrocharis and other taxa within Elsholtzieae share divergent stamens, a weakly 2-lipped corolla, and an asymmetric disc with an elongate anterior lobe, but it is unclear whether these features are apomorphic. This study represents both the most comprehensive phylogenetic analysis of Elsholtzieae to date and the only study to include all genera of Elsholtzieae. The monophyly of Elsholtzieae (including Ombrocharis) is well supported, and there is weak support for Elsholtzieae as sister to the rest of Nepetoideae. Additionally, our results do not support the merging of Keiskea with Collinsonia, and Elsholtzia may be polyphyletic.
... ex Benth.) Spach, Hanceola Kudô, and Siphocranion Kudô are very different from other Ocimeae in terms of nutlet, inflorescence, and calyx morphology, Paton and Ryding [102] treated the three genera as incertae sedis within Ocimeae, while Harley et al. [105] later established subtribe Hanceolinae to accommodate them. ...
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Background: A robust molecular phylogeny is fundamental for developing a stable classification and providing a solid framework to understand patterns of diversification, historical biogeography, and character evolution. As the sixth largest angiosperm family, Lamiaceae, or the mint family, consitutes a major source of aromatic oil, wood, ornamentals, and culinary and medicinal herbs, making it an exceptionally important group ecologically, ethnobotanically, and floristically. The lack of a reliable phylogenetic framework for this family has thus far hindered broad-scale biogeographic studies and our comprehension of diversification. Although significant progress has been made towards clarifying Lamiaceae relationships during the past three decades, the resolution of a phylogenetic backbone at the tribal level has remained one of the greatest challenges due to limited availability of genetic data. Results: We performed phylogenetic analyses of Lamiaceae to infer relationships at the tribal level using 79 protein-coding plastid genes from 175 accessions representing 170 taxa, 79 genera, and all 12 subfamilies. Both maximum likelihood and Bayesian analyses yielded a more robust phylogenetic hypothesis relative to previous studies and supported the monophyly of all 12 subfamilies, and a classification for 22 tribes, three of which are newly recognized in this study. As a consequence, we propose an updated phylogenetically informed tribal classification for Lamiaceae that is supplemented with a detailed summary of taxonomic history, generic and species diversity, morphology, synapomorphies, and distribution for each subfamily and tribe. Conclusions: Increased taxon sampling conjoined with phylogenetic analyses based on plastome sequences has provided robust support at both deep and shallow nodes and offers new insights into the phylogenetic relationships among tribes and subfamilies of Lamiaceae. This robust phylogenetic backbone of Lamiaceae will serve as a framework for future studies on mint classification, biogeography, character evolution, and diversification.
... Spach. Harley et al. (2003) later established the subtribe Hanceolinae in Ocimeae to accommodate the three genera, which is adopted in the recent classification of Lamiaceae (Harley et al. 2004). Zhong et al. (2010) first elucidated the phylogenetic relationships within Ocimeae based on molecular phylogenetic analyses. ...
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Hanceola is a genus of eight herbaceous species previously thought to be endemic to southern China. However, H. suffruticosa , a new species described here from China and Vietnam, differs from all other species of Hanceola by its subshrubby habit. It is also distinct in its shallowly bicrenate laminae and densely purplish glandular puberulent inflorescences. The morphological description, illustrations, and distribution of the new species are presented. A key to all species of Hanceola is also provided.
... Plants belonging to the family were collected and noted down their related information. By comparing the character of these plants with various available floras (Hooker, 1885;Cooke, 1906;Duthie, 1911;Gamble, 1924;Kanjilal et al., 1939;Mukerjee, 1940;Deb, 1961and Li and Hedge, 1994 and other literatures (Harley and Paton, 2001;Rajendran and Daniel, 2002;Harley et al., 2003;Suddee et al., 2004a, b;Suddee et al., 2005) (MUMPS). provides all the updated names of all the species of Shrub found as wild and cultivated as an 1. ...
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The family Lamiaceae of Manipur which is represented by 110 species distributed under 39 genera is discussed. Among the genera reported, Clerodendrum is represented y maximum number of 14 species. Some species like Clerodendrum lasiocephalum C. B. Clarke, Orthosiphon wattii Prain and Premna milleflora C.B.Clarke are found endemic to North-East India. Updated record of Lamiaceae of the state is provided in the present paper.
... But Paton and Ryding [57] identified a close relationship between Isodon, Hanceola and Siphocranion and placed the genera as incertae sedis. Further studies of Harley et al. [58] suggested that Isodon forms a branch of polytomy with three other monophyletic clades: subtribe Hyptidinae, subtribe Ociminae and subtribe Plectranthinae. The remaining division of tribe Ocimeae was subtribe Lavandulinae which is sister to other subtribes including Isodon. ...
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The use of Isodon in folk medicines has a long tradition. The tetracyclic compound ent-kaurane diterpenoids present in the genus have varied biological activities including antibacterial, anti-inflammatory and antitumor activity and makes it a good candidate in drug research. Being a cosmopolitan and important genus of the family Lamiaceae with considerable taxonomic dispute, a review on chromosome complements and its evolution is of great significance. The prevalence of confusion regarding the members of the genus makes it obligatory to include the synonymised members also. Hence, the review is made inclusive of Rabdosia, Isodon and members of Plectranthus which have now been included under the genus Isodon. The chromosome counts of all the reported species of Isodon have been examined and the haploid chromosome number was found to be n = 12. Except for the two species Isodon lophanthoides and Isodon ramosissimus for which the chromosome counts were reported as 2n = 36 and 2n = 42 respectively, all other species had 2n = 24 as its diploid count. The secondary basic chromosome number of x2 = 12 prevalent in majority of the taxa might have evolved from the primary base number x1 = 6 via protoautoploidy.
... 1985Harley (e.g. , 1987Harley (e.g. , 1988aHarley (e.g. ,b, 1992Harley (e.g. , 2006 e Harley et al. (2003Harley et al. ( , 2004Harley et al. ( , 2010. ...
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Siphocranion is an oligotypic genus of Lamiaceae, with two species mainly distributed in subtropical China and one of them found also in northeastern India, Myanmar, and Vietnam. Based on field investigation, morphological comparison, and molecular phylogenetic analyses, a new species of Siphocranion from the Sino-Vietnamese border is described as S. flavidum. Bayesian and maximum likelihood analyses on two nuclear ribosomal DNA regions and six plastid DNA regions reveal that S. flavidum is a distinct species in the genus and may be sister to the clade formed by the remaining two species of Siphocranion. Morphologically, the new species differs from S. macranthum and S. nudipes in its strigose stem with dark purple spots, thick papery lamina, significantly larger calyx, pale yellow corolla with tube slightly saccate at anterior side of base.
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Elsholtzia and its allied genera such as Collinsonia and Perilla (tribe Elsholtzieae, Lamiaceae) are an ecologically and economically important plant group consisting of ~71 species, with most species distributed in East and Southeast Asia, and several species in North America. Their phylogeny and historical biogeography resulting in a distant intercontinental disjunction are poorly understood. Here we use two nuclear (ETS, ITS) and five chloroplast (rbcL, matK, trnL-F, ycf1, ycf1-rps15) fragments to reconstruct the phylogeny, biogeographic history, and patterns of diversification of Elsholtzieae. The tribe Elsholtzieae is monophyletic and divided into five clades. The woody Elsholtzia species are nested within herbaceous ones and are inferred to have evolved from herbaceous ancestors. Molecular dating shows that the five major clades were established during the Eocene period, but most of the modern diversity did not originate until the Miocene. The divergence between the New World Collinsonia and the Old World Mosla-Keiskea-Perilla clade was dated to the mid-Miocene. Ancestral area reconstructions suggest that the tribe originated in East Asia, and then dispersed to Southeast Asia and North America. Overall, our findings highlight the important roles of the uplifts of the Qinghai-Tibetan Plateau (QTP) and climate changes from Middle Miocene onwards in promoting species diversification of Elsholtzieae.
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The tribe Ocimeae is fully revised for continental South East Asia (Burma, Thailand, Laos, Cambodia and Vietnam). In all, 77 taxa including 70 species and 14 varieties are recognised under 9 genera: Hyptis Jacq., Siphocranion Kudo, Isodon (Schrad. ex Benth.) Spach, Anisochilus Wall. ex Benth., Plectranthus L’Hér., Basilicum Moench, Orthosiphon Benth., Ocimum L. and Platostoma P. Beauv. This first part of the revision includes a general introduction covering the Ocimeae in SE Asia and taxonomic accounts of the Hyptidinae (Hyptis) and Hanceolinae (Siphocranion and Isodon). Descriptions, full synonyms relevant to South East Asian Floras, maps, line drawings, information about ethnobotany, distributions, habitats, ecology, endemism and conservation, selected specimen citations and an index to accepted names and synonyms are given. In all parts, 16 new species (including 11 validated names) and 3 new varieties are described in the genera Anisochilus, Isodon, Orthosiphon, Plectranthus and Platostoma. In this part, Isodon colaniae S. Suddee & A. J. Paton is validated and Isodon meeboldii (W. W. Sm.) S. Suddee is presented as a new combination. Two floristic elements are identified here: the Indo-Burmese and Sino-Himalayan elements that enter the area from the northwest and north, and the Indo-Chinese element that enters the area from Indo-China. Most species of Platostoma, the largest Indo-Chinese element, especially section Mesona and section Ceratanthus, are concentrated along the Mekong River in the Indo-Chinese peninsula around the Bolovens-Langbian plateaus. In all, there are 33 (43%) taxa endemic to the area of study. Seventy-four taxa were assessed according to IUCN red list criteria. Fourteen taxa were assessed as threatened. Two, Plectranthus tomentifolius and Orthosiphon truncatus are believed to be extinct.
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A revision is presented of the 40 species of Plectranthus, 1 species of Rabdosia and 3 species of Solenostemon which are indigenous, semi-naturalized or widely cultivated in Southern Africa. Descriptions, illustrations, keys and distribution data are provided. The following new names are published: P. mutabilis Codd, P. psammophilus Codd, P. rubropunctatus Codd, P. unguentarius Codd, P. ornatus Codd (nom. nov. for Coleus comosus Hochst. ex Guerke), P. zatarhendi (Forsk.) E. A. Bruce var. tomentosus (Benth.) Codd, —var. woodii (Guerke) Codd, P. madagascariensis (Pers.) Benth. var. aliciae Codd, Solenostemon scutellarioides (L.) Codd and S. shirensis (Guerke) Codd.
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The subtribes of the Ocimeae are discussed and new definitions of Plectranthinae and Ociminae are provided. The position of Hanceola, Siphocranion and Isodon within the tribe Ocimeae is discussed and the three genera are placed as incertae sedis. A key to the subtribes of the Ocimeae and genera incertae sedis are presented. The genus Skapanthus is placed in synonymy with Isodon.