7 research outputs found

    A new species of Acanthocereus (Cactaceae) from Honduras

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    Antecedentes y Objetivos: Durante exploraciones en las inmediaciones del Parque Nacional Montaña de Celaque, Honduras, se descubrió una especie nueva de Acanthocereus (Cactaceae). El objetivo del presente trabajo es describir e ilustrar a Acanthocereus lempirensis y compararla con A. chiapensis, su supuesto pariente más cercano. Métodos: Se realizaron colectas botánicas durante 2023. Se revisó material en diversos herbarios y una Base de Datos de Cactáceas de Norte y Centroamérica para hacer un análisis comparativo con otras especies del género, y se elaboró un mapa de distribución. Se evaluó el estado de conservación de la especie, según los criterios de la Lista Roja de la UICN.Resultados clave: Acanthocereus lempirensis parece estar íntimamente relacionada con A. chiapensis por la presencia en ambas especies de tallos verde glauco, ramificados desde la base, con una espinación similar, y flores nocturnas. Se distingue de esta especie fácilmente por la combinación de los siguientes caracteres morfológicos: segmentos del perianto rosas, con segmentos internos oblanceolados, con ápices redondeados a retusos, en su mayoría subagudos y los márgenes del ápice diminutamente lacerados. La especie se encuentra restringida a una pequeña área de acantilados calizos y laderas muy inclinadas con bosque tropical caducifolio con Quercus y Pinus. Únicamente se han detectado ca. de 150 individuos en estado silvestre. Se sugiere una categoría de conservación En Peligro Crítico (CR) para esta especie.Conclusiones: Este descubrimiento destaca a Honduras como un importante centro de diversidad de especies de Acanthocereus (cinco spp.), después de México (12 spp.). Los recientes hallazgos botánicos en Honduras (A. canoensis y A. lempirensis) confirman la importancia de continuar y fomentar los estudios florísticos y la conservación de sus ecosistemas.Background and Aims: During explorations in the Parque Nacional Montaña de Celaque, Honduras, a new species of Acanthocereus (Cactaceae) was discovered. The aim of the present study is to describe and illustrate A. lempirensis, and to compare it with its putatively closest relative, A. chiapensis. Methods: Botanical field collections were conducted during 2023. In order to compare the possible new species with other species in the genus, the collections in different herbaria and a Database of Cactaceae from North and Central America were examined and a distribution map was prepared. A preliminary assessment of the conservation status of the new species was preliminarily assessed using the IUCN Red List criteria.Key results: Acanthocereus lempirensis appears to be closely related to A. chiapensis by the presence in both species of green glaucous stems ramified from the base, similar spination, and nocturnal flowers. It can easily be distinguished from that species by the combination of the following morphological characters: pink perianth segments, internal perianth segments oblanceolate, rounded to retuse and mostly subacute apically, and the apical margins minutely lacerate. The species is restricted to a small area of limestone cliffs and steep slopes with tropical deciduous forests intermixed with Pinus and Quercus. Only ca. 150 individuals have been detected in the wild. A Critically Endangered (CR) conservation category is suggested for this species. Conclusion: This new discovery places Honduras as an important diversity center for species of Acanthocereus (five spp.), preceded by Mexico (12 spp.). The recent botanical findings in Honduras (A. canoensis y A. lempirensis) confirm the importance of continuing and supporting floristic studies in the country and the conservation it its ecosystems

    Flora vascular del municipio de Guadalcázar y zonas adyacentes, San Luis Potosí, México

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    Se estudió la riqueza de especies de plantas vasculares del municipio de Guadalcázar en la región del Altiplano Potosino, un área enclavada en la provincia fisiográfica conocida como Meseta Central y en donde una parte significativa de su superficie ha sido decretada área natural protegida. Se registraron 813 especies de plantas vasculares en 5 tipos de vegetación: matorral submontano, matorral xerófilo, bosque de Quercus, bosque de Pinus y pastizal, siendo el matorral submontano el que alberga la mayor riqueza florística, predominantemente especies de la familia Asteraceae. Un análisis del patrón de distribución de todas las especies mostró que 299 (36.8%) son endémicas de México, la mayoría de la familia Cactaceae. En cuanto al estado de conservación de las especies, 123 (15.1%) se encuentran en alguna categoría de riesgo e igualmente la mayoría de ellas son cactáceas. De la riqueza de plantas existentes en el área de estudio, 160 (19.7% del total) tienen registro de algún tipo de uso. ABSTRACT This study evaluates the species richness of vascular plants in the municipality of Guadalcázar, San Luis Potosí, an area located in the Central Mexican Plateau physiographic province, where a significant portion of their surface has been declared as a natural protected area. A total of 813 vascular plant species were registered in 5 vegetation types: submontane scrub, xerophytic scrub, oak forest, pine forest and grassland, with the submontane scrub being the vegetation type holding the highest floristic richness, predominantly Asteraceae. An analysis of the species distribution pattern revealed that 299 of them (36.8%) are Mexican endemics, most of them belonging to the Cactaceae. Considering the conservation status of the species, 123 (15.1%) are threatened, most of them also Cactaceae. A group of 160 of the total species (19.7%) had a record of some use in the study are

    Cactaceae at Caryophyllales.org- A dynamic online species-level taxonomic backbone for the family

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    This data paper presents a largely phylogeny-based online taxonomic backbone for the Cactaceae compiled from literature and online sources using the tools of the EDIT Platform for Cybertaxonomy. The data will form a contribution of the Caryophyllales Network for the World Flora Online and serve as the base for further integration of research results from the systematic research community. The final aim is to treat all effectively published scientific names in the family. The checklist includes 150 accepted genera, 1851 accepted species, 91 hybrids, 746 infraspecific taxa (458 heterotypic, 288 with autonyms), 17,932 synonyms of accepted taxa, 16 definitely excluded names, 389 names of uncertain application, 672 unresolved names and 454 names belonging to (probably artificial) named hybrids, totalling 22,275 names. The process of compiling this database is described and further editorial rules for the compilation of the taxonomic backbone for the Caryophyllales Network are proposed. A checklist depicting the current state of the taxonomic backbone is provided as supplemental material. All results are also available online on the website of the Caryophyllales Network and will be constantly updated and expanded in the future. Citation: Korotkova N., Aquino D., Arias S., Eggli U., Franck A., Gómez-Hinostrosa C., Guerrero P. C., Hernández H. M., Kohlbecker A., Köhler M., Luther K., Majure L. C., Müller A., Metzing D., Nyffeler R., Sánchez D., Schlumpberger B. & Berendsohn W. G. 2021: Cactaceae at Caryophyllales.org- A dynamic online species-level taxonomic backbone for the family.-Willdenowia 51: 251-270. Version of record first published online on 31 August 2021 ahead of inclusion in August 2021 issue. Data published through: Http://caryophyllales.org/cactaceae/Checklis

    A new combination in Peniocereus (Cactaceae) Una nueva combinación en Peniocereus (Cactaceae)

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    Acanthocereus chiapensis Bravo was described from plants collected in Chiapas, Mexico in March 1967. Field observations as well as detailed morphological and anatomical studies revealed that this entity rather belongs to genus Peniocereus. This taxonomic opinion was supported by the presence in this plant of tuberous roots; relatively thin stems; relatively small flowers and fruits, with numerous, weak spines; absence of primary phloem fiber caps on cortical bundles; and presence of minute, inter-cellular interstices in the seeds. Consequently, the following new combination is made herein: P. chiapensis (Bravo) C. Gómez-Hinostrosa and H. M. Hernández.Acanthocereus chiapensis Bravo fue descrita con base en plantas recolectadas en Chiapas, México en Marzo de 1967. Observaciones en el campo así como estudios morfológicos y anatómicos detallados, revelaron que esta entidad pertenece más bien al género Peniocereus. Esta opinión taxonómica está apoyada por la presencia en esta planta de raíces tuberosas; tallos relativamente angostos; flores y frutos relativamente pequeños, con numerosas espinas frágiles; ausencia de fibras sobre el floema primario de los haces corticales; y presencia de intersticios inter-celulares en las semillas. En consecuencia se hace la siguiente combinación nueva: P. chiapensis (Bravo) C. Gómez-Hinostrosa and H. M. Hernández

    Los géneros Alysicarpus y Desmodium (Fabaceae) en la península de Yucatán, México The genus Alysicarpus and Desmodium (Fabaceae) in the Yucatán Peninsula, Mexico

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    Se presenta una revisión de los géneros Alysicarpus Desv. y Desmodium Desv. (Desmodieae: Desmodiinae) en la porción mexicana de la península de Yucatán. Basada en ejemplares de herbario depositados en 8 herbarios CHAPA, CICY, CIQRO, ENCB, IEB, MEXU, UCAM y XAL. Se reconocen Alysicarpus vaginalis (L.) DC., Desmodium affine Schltdl., D. distortum (Aubl.) J.F. Macbr., D. glabrum (Mill.) DC., D. incanum DC., D. procumbens (Mill.) Hitchc., D. scorpiurus (Sw.) Desv., D. tortuosum (Sw.) DC. y D. triflorum (L.) DC. Se incluyen claves para la identificación de géneros y especies, así como descripciones morfológicas, información ecológica, fenológica, nombres comunes (cuando se conocen), algunos usos y mapas de distribución.A revision of the genera Alysicarpus Desv. and Desmodium Desv. (Desmodieae: Desmodiinae) for the Mexican region of the Yucatán Peninsula is presented. This treatment is based on the study of botanical material of 8 herbaria, CHAPA, CICY, CIQRO, ENCB, IEB, MEXU, UCAM, and XAL. We recognized Alysicarpus vaginalis (L.) DC., Desmodium affine Schltdl., D. distortum (Aubl.) J.F. Macbr., D. glabrum (Mill.) DC., D. incanum DC., D. procumbens (Mill.) Hitchc., D. scorpiurus (Sw.) Desv., D. tortuosum (Sw.) DC., and D. triflorum (L.) DC. Identification keys to genera and to species are included, as well as morphological descriptions, ecology, phenology, some common names and uses for each species

    Cactaceae at Caryophyllales.org – a dynamic online species-level taxonomic backbone for the family

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    This data paper presents a largely phylogeny-based online taxonomic backbone for the Cactaceae compiled from literature and online sources using the tools of the EDIT Platform for Cybertaxonomy. The data will form a contribution of the Caryophyllales Network for the World Flora Online and serve as the base for further integration of research results from the systematic research community. The final aim is to treat all effectively published scientific names in the family. The checklist includes 150 accepted genera, 1851 accepted species, 91 hybrids, 746 infraspecific taxa (458 heterotypic, 288 with autonyms), 17,932 synonyms of accepted taxa, 16 definitely excluded names, 389 names of uncertain application, 672 unresolved names and 454 names belonging to (probably artificial) named hybrids, totalling 22,275 names. The process of compiling this database is described and further editorial rules for the compilation of the taxonomic backbone for the Caryophyllales Network are proposed. A checklist depicting the current state of the taxonomic backbone is provided as . All results are also available online on the website of the Caryophyllales Network and will be constantly updated and expanded in the future
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