![Evolutionary Patterns in Neotropical Helieae (Gentianaceae): Evidence from Morphology, Chloroplast and Nuclear DNA Sequences]()
Evolutionary Patterns in Neotropical Helieae (Gentianaceae): Evidence from Morphology, Chloroplast and Nuclear DNA SequencesLena Struwe, Victor A. Albert, M. Fernanda Calió, Cynthia Frasier, Katherine B. Lepis, Katherine G. Mathews and Jason R. Grant · Taxon · 2009