Abstract Distephanus Cass. comprises 43 distinctive species of shrubs and small trees that have been placed historically within the ironweed tribe, Vernonieae (Asteraceae). Using the most expansive sampling of Distephanus to date, this study aims to test the monophyly of this genus and facilitate its classification. Molecular phylogenetic analyses were conducted using four molecular markers from the nuclear and plastid genomes. These data also supported divergence dating analyses that were performed to understand the timing of diversification events within Distephanus and other related genera as well as ancestral area reconstruction analyses to infer the biogegraphic history of species diversity in this group. Results from this study indicate that, as currently circumscribed, Vernonieae is not monophyletic and that Distephanus is, in fact, sister to a clade that comprises Vernonieae and another tribe, Moquinieae, which only includes two species restricted to Brazil. On the basis of these findings, Distephanus is classified in a new tribe that we describe here, Distephaneae. This new tribe comprises 41 species of Distephanus that are easily distinguished from Moquinieae and Vernonieae based on the presence of florets with yellow corollas and trinervate leaves.
Austinia, a new genus of Convolvulaceae is described and its relationship with other genera is discussed. Two species previously placed in Jacquemontia are referable to the genus. However, a revision of species delimitation demonstrates that the two are conspecific. Austinia therefore comprises a single species, endemic to Brazil.
Abstract Ghana’s plant diversity is estimated at 2,974 plant species, belonging to 1,077 genera and 173 plant families. However, a Flora of Ghana is yet inexistent: targeted floristic and taxonomic studies are still much needed to document the plant diversity of the country fully at the family, generic and species levels. This is essential for identifying priority conservation areas in the country and support further research in crop wild relatives or medicinal plants, which will help tackle food insecurity and improve livelihoods. In this study, we provide a taxonomic revision of the Ipomoea spp. in Ghana to enhance their identification, conservation and sustainable utilization as food and medicine among other uses. An extensive literature review was carried out, including historical references and online taxonomic databases, to recover information on accepted names, type specimens and synonyms, followed by consultation of herbarium specimens at GC herbaria, to retrieve morphological information and database specimens. Specimen locality information was georeferenced, and records plotted onto distribution maps. As a result, this work provides an identification key to the species of Ipomoea of Ghana, nomenclatural information, comprehensive morphological descriptions, detailed list of examined specimens, distribution maps and notes on conservation status and traditional plant uses. In total, 28 species are fully described, 20 of which are native and eight introduced from the Americas; five are new records to Ghana.
Background and aims – Keraunea is a genus recently described in Convolvulaceae, though it has sat uncomfortably in this family. A recent molecular phylogenetic study suggests that its two morphologically almost identical species actually belong to different families, Malpighiaceae (Superrosids) and Ehretiaceae (Superasterids), although with little-to-no morphological evidence to support it. Material and methods – Sequences of matK , rbcL , and ITS for all the 77 currently accepted genera of Malpighiaceae, K. brasiliensis and Elatinaceae (outgroup) were compiled from Genbank and analysed with Maximum Likelihood and Bayesian Inference criteria for nuclear, plastid and combined datasets. Additional database and herbarium studies were performed to locate and analyse all duplicates of the holotype of K. brasiliensis to check for misidentified or contaminated materials. Key results – Our examination of expanded DNA datasets and herbarium sheets of all K. brasiliensis isotypes revealed that an error in tissue sampling was, in fact, what led to this species being placed in Malpighiaceae. Kew’s isotype had a leaf of Malpighiaceae (likely from Mascagnia cordifolia ) stored in the fragment capsule, which was unfortunately sampled and sequenced instead of the actual leaves of K. brasiliensis . Conclusions – DNA sequences can be helpful in classifying taxa when morphology is conflicting or of a doubtful interpretation, with molecular phylogenetic placement becoming a popular tool that potentially accelerates the discovery of systematic relationships. However, good knowledge of plant morphology is essential for formulating the phylogenetic hypotheses to be tested and for a critical re-interpretation of the results in the context of biological information of the species or families. Thus, these techniques are, much like any others, prone to methodological errors. We highlight the crucial need to observe plant morphology alongside molecular phylogenetic results, particularly when the new hypotheses are in disagreement with the existing classification and at risk of incurring gross taxonomic mistakes.
Societal Impact Statement Biological samples and their associated information are an essential resource used by scientists, governments, policymakers, practitioners and communities to ensure that biodiversity can be appropriately protected and sustainably used. Yet, considering the enormous task of documenting the vast numbers of as‐yet‐unknown plant and fungal species, greater international coordination for biological collecting and recording is necessary, built on equitable collecting practices and standards. Here, we propose five commitments to accelerate and enhance scientific knowledge of plant and fungal diversity, while increasing collaboration, benefit sharing and efficiency. Summary Almost all life depends on plants and fungi, making knowledge of their diversity and distribution—primarily derived from biological collections—fundamental to national and international conservation, restoration and sustainable use commitments. However, it is estimated that some 15% of all plant species and over 90% of all fungal species have not yet been scientifically described, hampering our ability to assess and demonstrate the impact of efforts to halt biodiversity loss. In addition, organisations and researchers around the world lack a concerted strategy for increasing complementarity and avoiding overlap in botanical and mycological research, particularly in relation to the collection of specimens. We here present the 2030 Declaration on Scientific Plant and Fungal Collecting, summarising a commitment towards such a necessary strategy. Its components were identified from discussions during and after a series of four workshops and plenary discussions at the 2023 State of the World's Plants and Fungi symposium convened by the Royal Botanic Gardens, Kew, and were then consolidated into the present form by the authors. The Declaration was subsequently opened up for endorsement by signatories. Collectively, we agree on a set of five commitments for cataloguing the world's flora and funga, designed to maximise efficiency, facilitate knowledge exchange and promote equitable collaborations: (1) use evidence‐based collection strategies; (2) strengthen local capacity; (3) collaborate across taxa and disciplines; (4) collect for the future; and (5) share the benefits. This Declaration is a first step towards increased global and regional coordination of scientific collecting efforts.
ABSTRACT Convolvulaceae is a diverse and economically important plant family in Tropical Africa, including the crop sweet potato ( Ipomoea batatas (L.) Lam.) and its wild relatives, morning glories ( Ipomoea L.), bindweeds ( Convolvulus L.), invasive weeds (e.g. Cuscuta L.) and several other species with food, medicinal, or traditional uses. A taxonomic treatment of Convolvulaceae for Guinea is here presented, including comprehensive morphological descriptions, identification keys to genera and species, distribution and ecological information, specimen data, and documentation of known uses. A total of 51 species belonging to 16 genera are documented, 38 of which are native, and 13 presumed introduced; 33 of these are used as medicine, 18 as ornamental, 12 as food and 15 with a range of other uses. Preliminary IUCN Red List assessments were carried out for 45 species for which there were no previous assessments All 45 preliminary conservation assessments were categorised as Least Concern for the global Red List, with 61% of native species having at least one occurrence point falling within protected areas.
Xenostegia D.F.Austin et Staples is a small genus in the family Convolvulaceae, with five species restricted to Africa, and one species widespread across the Paleotropics. It was initially established to accommodate two species in Merremia that possessed non-spinulose pantoporate pollen, rare in the family, along with stigma and anther characters that did not fit other genera entirely. Recent molecular studies, and the discovery of a new species in Central Africa, have expanded the delimitation of this genus from two to six species. Our survey captures the palynological variation of all currently documented species of Xenostegia, revealing that more types of pollen aperture patterns are present (15- and 30-colpate), with implications for the circumscription of the genus. In addition, a unique pattern of exine sculpture (plurigemmate-echinate) was discovered, which is shared by all the species and has not yet been documented in any other member of family Convolvulaceae.
Objetivos: assumindo a obrigatoriedade de classificação ICPC-2 em cada consulta, conhecer a informação, em consultas passadas pelo método de Weed-SOAP segundo o gênero e idade de quem consulta o médico (consulente ou paciente), caracterizando o nível de registro pelo método SOAP em Subjetivo (S) - classificação e anotações - em Objetivo (O) anotações sobre o estado do paciente, em Avaliação (A) da classificação e em Plano (P) da classificação e anotações. Métodos: estudo observacional, transversal em outubro de 2012, em amostra aleatorizada das consultas presenciais de dois médicos orientadores de internato de especialidade, em três meses sorteados do 1º semestre de 2012, e em quatro dias sorteados em cada mês, em amostra representativa com intervalo de confiança de 95% e margem de erro de 6%. Utilizou-se estatística descritiva e inferencial. Resultados: amostra de 318 consultas, n=149 (46,9%) no gênero masculino, n=61 (19,2%) no grupo etário <18 anos e n=194 (61,0%) no ≥18 e <65 anos, ns por grupos etários e gênero. Em S, há classificação em 98,7% e anotação em 47,2% das consultas; Em O, verificamos “As anotações demonstram o estado do paciente” em 66,0% e “As anotações são explícitas e entendíveis” em 79,9%; em A, 97,8% das consultas têm classificação; Em P, há classificação em 96,5% e anotações explicando o plano em 23,0% das consultas. Distribuição sem significado por grupo etário para as variáveis estudadas. É mais frequente haver no gênero feminino em S “As anotações são explícitas e entendíveis” e em P “Há classificação de procedimentos”. Conclusão: há campo para mais completa coleta da informação na consulta, permitindo, assim, melhor conhecimento de cada consulta e caso para o futuro.