INVESTIGADORES
LAVIA Graciela Ines
congresos y reuniones científicas
Título:
Identity of three American species of Borreria (Rubiaceae): B. latifolia, B. flavovirens and B. poaya. New contributions to stablish its delimitation: first chromosome counts, new synonyms, and expansion of geogr
Autor/es:
CABRAL, E.L.; SOBRADO, S.V.; LAVIA, G.I.
Lugar:
Xalapa, Veracruz, Mexico
Reunión:
Conferencia; IV International Rubiaceae (Gentianales) Conference.; 2008
Institución organizadora:
National Botanic Garden of Belgium
Resumen:
The genus Borreria G.Mey. belongs to tribe Spermacoceae. Since its original description, some species of this genus went through changes regarding their taxonomic delimitation, or were segregated or included in other taxa. One of the reasons for this is the variety of exomorphological and palynological characters.Borreria G.Mey. belongs to tribe Spermacoceae. Since its original description, some species of this genus went through changes regarding their taxonomic delimitation, or were segregated or included in other taxa. One of the reasons for this is the variety of exomorphological and palynological characters.Furthermore, many species have similar morphological aspects in the field and even more when they are herborized. That is why there are divergent views among specialists regarding the criteria for delimiting species, and the genus itself, with some authors merging Borreria within Spermacoce. Since molecular phylogenetic studies of the American species of the genus are pending, we consider that transferring all Borreria species to Spermacoce is at least precipitate. Borreria within Spermacoce. Since molecular phylogenetic studies of the American species of the genus are pending, we consider that transferring all Borreria species to Spermacoce is at least precipitate. Erroneous names that increase confusion for the correct identification of three related species, Borreria latifolia B. flavovirens B. poaya, are commonly found in many herbaria. This work presents exomorphological, palynological, and cytological differences, as well as similarities among the three species. We also present the first chromosome counts for the three taxa. The geographical distribution of B. latifolia and B. poaya is expanded by recognizing new records from three South American countries. New synonyms for these last two species are given.B. poaya is expanded by recognizing new records from three South American countries. New synonyms for these last two species are given.