Sapranthus

Abstract: A taxonomic revision of the genus Sapranthus is presented. Within the genus Sapranthus 8 species are recognized, 2 of which are new. Distinguishing morphological characteristics are discussed, and a dichotomous key to all species is given. The species treatments include descriptions, full synonymy, geographical and ecological notes, vernacular names, and taxonomic notes. Distribution maps are presented of all species, and a complete identification list of exsiccatae examined is included.

Abstract: Summary The wood anatomy of three related genera of the Annonaceae has been studied and de scribed as part of a research project on the taxonomy of neotropical taxa of the family. The wood anatomy of the three genera is char acterised by the occurrence of many fine apo tracheal continuous concentric bands of paren chyma. The genera Desmopsis, Sapranthus, and Stenanona, restricted to Central America, can be separated on wood anatomical characters such as element length, ray height and the number of parenchyma bands per mm. A key for the genera is presented and the possible phylogenetic relationships are discussed. Final ly, the wood anatomical results are correlated with data on pollen morphology, flower mor phology and morphology of fruits and leaves. more genera

Abstract: Background and Aims: In Mexico, the Neotropical genera of Annonaceae tribe Miliuseae, including Sapranthus, Stenanona and the Mexican endemic genus Tridimeris, are particularly diverse and many of their species are endemic to this country. This diversity is not fully documented and many new species have been discovered as a result of recent botanical explorations in southern Mexico. Here, we describe a new species of Stenanona. Methods: We collected a new species of Stenanona during field work in a little known karst forest area located in the highlands of Chiapas, Mexico. The new species was recognized using the unique combination of features through comparisons with morphologically similar species and literature review. We assessed its conservation status by calculating its extent of occurrence (EOO) and its area of occupancy (AOO) using the GeoCAT tool and applying the IUCN Red List Categories and criteria. Key results: A new species of Annonaceae, namely Stenanona morenoi, endemic to karstic forests of southern Mexico, is described and illustrated. According to the criteria established by the IUCN, it is possible to tentatively determine the species as Critically Endangered (CR B1ab (iii)). Conclusions: Based on its general floral morphology, S. morenoi is hypothesized to belong to subclade A of the Desmopsis-Stenanona clade. Within this lineage, S. morenoi shares several morphological features with S. migueliana, S. stenopetala and S. zoque.

Abstract: Sapranthus isae is described and illustrated. This new species differs from its congeners by its fragrant flowers and the black elliptic bodies present on the base of the internal petals. The new species is only known from rocky outcrops in northern Colombia (Cesar Deparment, municipality of Curumani), surrounded by swampy areas.