Brittonia最新文献

We present the taxonomic treatment of Doryopteris from the states of Minas Gerais and Espírito Santo, Brazil, including some hybrids recognized for the first time in the literature. Fourteen species occur in the study area, plus three putative hybrids. Doryopteris × kollmannii, hybr. nov., is newly described; Doryopteris × angularis and Doryopteris × branneri were originally described as species, but have been lately considered as synonyms of D. rediviva and D. varians, respectively. Lectotypifications are proposed for D. raddiana var. patula, Litobrochia raddiana, Pteris collina, P. concolor, P. sagittifolia, and P. varians. We provide descriptions, illustrations, and taxonomic comments for all taxa.

A new species of Acanthaceae, Justicia guerrerensis, is described from a limited region of the state of Guerrero in southwestern Mexico. In several morphological characters, it resembles J. ixtlania, a widespread species that occurs in several states to the northwest of Guerrero. A key is presented to distinguish these two species. Images of the holotype and macromorphological features of J. guerrerensis are provided. Additional comparisons between J. guerrerensis and J. ixtlania via SEM images of pollen and a distribution map are also provided.

The names Coccoloba caracasana, C. caracasana f. glabra, C. cozumelensis, C. floribunda, C. humboldtii var. longipedicellata, and Campderia mexicana are lectotypified, and seventeen specimens with mature fruits are proposed as epitypes to facilitate the recognition and delimitation of Coccoloba species distributed in Mexico and Central America. The presence of fruits in these specimens allowed us to recognize and reinstate the names Coccoloba lapathifolia, C. euvelutina, and C. matudae.

This study describes Siphoneugena carolynae (Myrtaceae), a new species from the Brazilian Atlantic Forest, in the state of Rio de Janeiro. The species inhabits inselberg forests and differs from all other species of Siphoneugena by the following exclusive combination of morphological characters: relatively long petioles, leaf blades chartaceous with midvein canaliculate adaxially, inflorescences in racemes with a markedly compressed and indistinguishable main axis, hypanthium markedly constricted above the ovary, calyx calyptrate, ovaries with two locules, each with four ovules, and cotyledons densely covered with foveolate glands. We herein provide taxonomic notes, morphological plates (derived from both fresh and dried material), and a distribution map. Regarding the conservation status, the new species is preliminarily assessed as Data Deficient (DD), but comments on population size and possible threats to the habitat are presented.

Aeschynanthus maoi, a new species of Gesneriaceae from Lower Dibang Valley of Arunachal Pradesh, India, is described and illustrated. It is morphologically similar to A. wardii and A. bracteatus, but differs from the former by its small (3–5 mm long) boat-like bracts, narrowly ovate or triangular calyx lobes, 1–8 flowered inflorescences, and turbinate staminodes. It differs from the latter by caducous green bracts, short peduncles (0.2–0.8 cm long), and narrowly ovate or triangular green calyx lobes. A detailed description of the new species with color photographs and a comparison to similar species are provided. The new species is evaluated for risk of extinction and provisionally assessed as Critically Endangered (CR) according to IUCN Red List Categories and Criteria.

A new species from the Malesherbia sect. Malesherbia is described for the department of Lima, Peru. Malesherbia anxia is found in arid areas of the valley of the Chancay River (Huaral, Lima), on the western slope of the Andes, between 1,580 to 2,600 m. This species has morphological affinities with M. weberbaueri and M. splendens. A key for the identification of other related species is presented, accompanied by a comparative table of diagnostic morphological characters. With this taxonomic novelty, the number of Malesherbia species in Peru rises to 14, of which 12 are endemic.

A new species of Drymonia from Northern Peru was recently discovered during exploratory field work and is described here. Drymonia cutervoensis J.L.Clark, R.Rojas & Rob.Fern. is differentiated from all other congeners by its terrestrial unbranched shrub habit and laterally compressed corolla tubes. Drymonia cutervoensis is featured with field images and compared with other members of Drymonia that share laterally compressed corolla tubes. Based on IUCN guidelines, a preliminary conservation status of Endangered (EN) is assessed for Drymonia cutervoensis.

During the review of the Brazilian species of Lorostemon (Clusiaceae), we verified that some specimens previously reported as L. bombaciflorus Ducke for South Guyana and the Brazilian Eastern Amazonia belong to a species still unknown to science. Here, we provide a description, taxonomic comments, illustrations, and a distribution map of Lorostemon roseoviridis Fer.-Silva & L.Marinho, a new species from eastern Amazonia.

Describimos e ilustramos Freziera antioquensis (Pentaphylacaceae), una especie nueva, conocida de dos ejemplares recolectados en la Cordillera Occidental de Colombia, en el departamento de Antioquia, región del Chocó Biogeográfico. Entre los atributos morfológicos que distingue esta especie nueva de entre sus congéneres es la pubescencia densa, con tricomas largos, que cubre los ramúsculos, los pecíolos y el envés de las láminas foliares, así como por la ausencia de tricomas en las bractéolas y los sépalos. Con la descripción de esta especie, Colombia posee cerca de 27 de especies de Freziera, 12 de las cuales son endémicas y conocidas por sólo uno o dos ejemplares de herbario.

The genus Collaea belongs to tribe Diocleae (Leguminosae subfamily Papilionoideae) and includes eight species from South America. A new species from South Brazil was discovered during a taxonomic revision of the genus and is formally described as Collaea caerulea. This species is found in a small area of Santa Catarina State, near the border with Paraná State, in regenerating secondary forests. It can be differentiated from other species from South Brazil by the combination of narrowly elliptical leaflets with an acuminate apex and bluish-lilac to bluish petals. The region where the species was discovered has only been recently explored by botanists and its natural vegetation is currently highly fragmented. Considering these factors, we propose that this species be classified as critically endangered. Here, we present a morphological description, geographical distribution, preliminary conservation assessment, and illustrations of the new species. We have also included an identification key for all Brazilian species of the genus.