查看更多>>摘要：A new species of Chamaecrista was found in the Serra do Espinhaco region in the state of Minas Gerais, Brazil, during an expedition to study the taxonomy of this genus. Chamaecrista sempreviva Fort.-Perez & L.C. Zeferino sp. nov. is herein described, illustrated, and assigned to Chamaecrista sect. Absus. Comments about the ecology, distribution, preliminary conservation status as well as its morphological relationships and flowering and fruiting season of the new species, are provided. Additionally, a secretory structure survey of the leaflets of the new species and its related congeners is presented. All species studied share the presence of secretory and mucilaginous idioblasts in their leaflets, but the position of these cells types serves to differentiate them.
查看更多>>摘要：Following the reinstatement of Aloe davyana as an accepted taxon at the rank of species, rather than at that of variety under A. greatheadii, and the subsequent reinstatement of A. davyana var. subolifera, a new variety, A. davyana var. magdae, is here described. Aloe davyana var. magdae, from the southern part of the distribution range of the species, inter alia differs from the pale flesh-pink to dull brick-red-flowered autonymic variety by being more intensely red-flowered, while the other, north-central variety, A. davyana var. subolifera, is most often nearly white-flowered. In addition, the new variety has about twice as many leaves per rosette, in comparison to the autonymic variety and A. davyana var. subolifera.
Nobre, Alexandra MonteiroMarinho, Lucas CardosoCabral, Fernanda NunesDemarchi, Layon Oreste...
9页
查看更多>>摘要：Herein, we present Tovomita manauara A. Nobre & L. Marinho, a new species of Clusiaceae that is presumably endemic to the Amazonas state, in Brazil. The new species was initially identified as T. caloneura A.C. Sm., which is a morphologically similar and sympatric species. Although the species was based only on vegetative and fruit morphological characteristics, Tovomita manauara can be recognized by the large number of secondary veins (25-36 pairs vs. up to 26 pairs in T. caloneura) and 4-septate, turbinate to napiform fruits (vs. 5-septate and fusiform in T. caloneura). In addition to macromorphology, anatomical characters, such as the secretory canals larger, presence of collenchyma in the petiole, and the absence of druses in the midvein are also helpful for the identification of T. manauara.
查看更多>>摘要：A new putative natural hybrid of Cyrtopodium, C. x flavopunctatum, from sandy coastal plain vegetation, known as restinga, in the state of Santa Catarina in southern Brazil is described and illustrated. It was found growing among a population of C. flavum and is similar to that species in vegetative and overall floral morphology, but distinguished by the sepals and petals with brown spots, lateral lobes of lip and base of the central lobe orange or orange-spotted, very short isthmus (1-2 mm long), lip midlobe margins slightly verrucose and flowers slightly citrusy-scented. In the color of the flowers, it is intermediate between C. flavum, with completely yellow flowers, and C. gigas or C. palmifrons, epiphytic species with profusely dotted flowers that occur in the same region and bloom at the same time as C. flavum. Additional studies with genetic data are needed to confirm the possible hybrid origin and the identity of the second parental species.
查看更多>>摘要：The typification of the name Linum austricum subsp. collinum is revisited. The name was "lectotypified" from a specimen kept at BM. This type designation is briefly discussed and superseded because was being contrary to Art. 9.3 of the International Code of Nomenclature for algae, fungi, and plants (Shenzhen Code). In this work, all relevant specimens are carefully evaluated for the purpose to fix the application of the name. We have chosen and designated the best admissible lectotype for this name from the original material. In addition, the lectotype of the name Linum immaculatae, currenty treated as a synonym of Linum austricum subsp. collinum, is designated from a specimen preserved at MA.
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