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This work has been funded by FONDECYT (Fondo Nacional de Desarrollo Científico y Tecnológico) from Chile by means of a postdoctoral fellowship of the first author (project Nº3170270), Two new Andean species belonging to the tribe Senecioneae (Compositae) are described herein, i.e., Dendrophorbium azoguesense from Ecuador and D. varicosum from Bolivia. The species Pentacalia todziae is recorded for the first time in Ecuador and the names Dendrophorbium onae and D. onae var. leonis synonymized to D. scytophyllum. Taxonomic discussions and diagnostic characters to differentiate each species are provided, as well as a distribution map and pictures of living plants when available., Depto. de Biodiversidad, Ecología y Evolución, Fac. de Ciencias Biológicas, TRUE, pub

Coccoloba tunii is here described as a new species from Mexico. Morphological characters of the leaf, inflorescence, and fruit show discontinuities among populations of C. tunii and its relative, C. liebmannii. In addition, both species exhibit different geographical patterns, C. tunii is exclusive of the Central Depression and Plateau of Chiapas (Mexico) at mid elevations, while C. liebmannii ranges from Oaxaca to Colima on lowlands along the Pacific watershed., SEP (Secretaría de Educación Pública) del Gobierno de México, Depto. de Biodiversidad, Ecología y Evolución, Fac. de Ciencias Biológicas, TRUE, pub

Centaurea stuessyi is described as new to science from the eastern Iberian Peninsula, Spain. The range of this new species coincides with the zone of overlap of the ranges of two related species, C. antennata (subsp. antennata) and C. linifolia. The chromosome number found in the new species (2n = 44) reinforces its differences from C. linifolia (2n =22) and C. antennata (2n = 22). The new species is compared with related species, and a description is given of its ecological preferences., Ministerio de Educación y Ciencia, Depto. de Biodiversidad, Ecología y Evolución, Fac. de Ciencias Biológicas, TRUE, pub

This work was partially financed by SEP-PROMEP “Fortalecimiento del Cuerpo Académico Diversidad de los Recursos Florísticos de Mesoamérica UADY-CA94”. One of the authors, I. Arnelas Seco, was the beneficiary of a postdoctoral grant (ARNITZ81031712) financed by S.R.E. of Mexican Government, A new species Neomillspaughia hondurensis (Polygonaceae) from Honduras is described and illustrated. This species is morphologically and ecollogicaly different from the other two currently known Neomillspaughia species, being more related to N. emarginata than to N. paniculata. A comprehensive comparison and a key for the three species are provided., Depto. de Biodiversidad, Ecología y Evolución, Fac. de Ciencias Biológicas, TRUE, pub

Oritrophium yacuriense se describe como una nueva especie de los Andes del sur de Ecuador. Se utilizan caracteres morfológicos para diferenciarla de O. repens, especie similar que difiere principalmente en la forma de la hoja. La nueva especie crece en páramos herbáceos y húmedos del complejo lagunar del Parque Nacional Yacuri., Ministerio de Medio Ambiente (Ecuador), Universidad Técnica Particular de Loja, Depto. de Biodiversidad, Ecología y Evolución, Fac. de Ciencias Biológicas, TRUE, pub

Coccoloba floresii is here described as a new species from Mexico. Morphological characters of the leaf, inflorescence, and fruit show discontinuities among populations of C. floresii and its relatives, C. barbadensis and C. cozumelensis. In addition, C. floresii is exclusive of the tropical dry forests of Central Depression and Plateau of Chiapas (Mexico) at high elevations., SEP (Secretaría de Educación Pública) del Gobierno de México, Depto. de Biodiversidad, Ecología y Evolución, Fac. de Ciencias Biológicas, TRUE, pub