BECAS
FLORENTÍN Javier Elias
artículos
Título:
Integrative taxonomic analysis sheds light on three historically disputed American Spermacoce species, and a key to the American species of Spermacoce (Spermacoceae, Rubiaceae)
Autor/es:
NUÑEZ FLORENTIN MARIELA; FLORENTÍN, JAVIER ELIAS; SALAS, ROBERTO MANUEL
Revista:
SYSTEMATIC BOTANY
Editorial:
AMER SOC PLANT TAXONOMISTS
Referencias:
Lugar: Laramie; Año: 2020 vol. 45
ISSN:
0363-6445
Resumen:
Since their original description, there has been great confusion among Spermacoce glabra, S. riparia, and S. tenuior. These species can be distinguished mostly by their seed features. Clustering and principal coordinate analyses (PCoA) were used to scrutinize the forming of hierarchical non-overlapping groups strictly according to degree of morphological similarity. Thirteen characters were scored for 26 herbaria specimens. The taxonomic identity of these three species is discussed. Redefined descriptions and illustrations are provided, especially for fruit, seed, and pollen characters. A map and a discussion of the updated geographical distribution of these species are included. A table summarizing their different taxonomic concepts through the contemporary floristic works and an identification key to all American Spermacoce species are also provided. The new combination Spermacoce affinis (DC.) R.M. Salas is here presented.