References

For Campanula

Lammers. 2007. In Kadereit, J.W., and C. Jeffrey. 2007. The families and genera of vascular plants. VIII. Flowering plants – Eudicots – Asterales. Springer, Berlin. 636 pp. Google Scholar

Morin, N.R. 2020. Taxonomic changes in North American Campanuloideae (Campanulaceae). Phytoneuron 2020-49: 1-46. Published 15 July 2020. ISSN 2153 733X Google Scholar

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Shulkina, T.V., J.F. Gaskin, and W.M.M. Eddie. 2003. Morphological studies toward an improved classification of Campanulaceae s. str. Ann. Missouri Bot. Gard. 90: 576-591. Google Scholar

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