Abstract
Molecular studies carried out by Achille et al. (2006), revealed the polyphyly within the big genus Guettarda and in its relationships. According to the nrDNS ITS sequence analyses the New World Guettardas belong to two different clades. Most of the species forms a well defined large clade, but two species ( G. crispiflora and G. hirsuta ) belong to the different Bobea -clade as a clearly distinct subclade, characterised by a set of important morphological characters. Based on these evidences the segregation of this second group of the New World Guettardas seems to be well argumented under the name of the revalidated and amplified genus of Tournefortiopsis Rusby, effectuating also the necessary new combinations.
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