Morphometrics in the recurved corolla clade of Burmeistera (Campanulaceae)

In this study, we used morphometric data to test species boundaries in the genus Burmeistera (Campanulaceae). Morphometrics measurements were made on herbarium specimens from a monophyletic clade of three species with recurved corolla lobes: B. crispiloba, B. sodiroana, B. succulenta. We used using both hierarchical and normal mixture model-based clustering methods to test the current species hypotheses. Our results support the recognition of the three known species plus a new species described in the paper.

Methods
Morphometric measurements were made from 95 herbarium specimens using a ruler and digital calipers. The herbarium specimens were sourced from three herbaria: MO, NY, and QCA. Measurements include 23 continuous quantitative variables and two qualitative variables, which are described in more detail in the README file. The measurements are unprocessed.