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.

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

Park, J.M., Z. Liber, W.M. Eddie, and G.M. Schneeweiss. 2006. Phylogeny and biogeography of isophyllous species of Campanula (Campanulaceae) in the Mediterranean area. Syst. Bot. 31(4): 862-880.

Roquet, C., S.G. Llorenç, J.J. Aldasoro, A. Susanna, M.L. Alarcón, and N. Garcia-Jacas. 2008. Natural delineation, molecular phylogeny and floral evolution in Campanula. Systematic Bot. 33: 203-217.

Rosatti, T.J. 1986. The genera of Sphenocleaceae and Campanulaceae in the southeastern United States. J. Arnold Arb. 67: 1-64.

Shetler, S.G. 1982. Variation and evolution of the Nearctic harebells (Campanula subsect. Heterophylla). Phanerogamarum Monographiae XI. J. Cramer, Vaduz. 516 pp.

Shetler, S.G., and N.R. Morin. 1986. Seed morphology in North American Campanulaceae. Ann. Mo. Bot. Gard. 73: 653-688.

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.

Sutherland, B.L., and L.F. Galloway. 2018. Effects of glaciation and whole genome duplication on the distribution of the Campanula rotundifolia polyploid complex. Amer. J. Bot. 105: 1760-1770.

Wilson, J., A. Perry, J.R. Shepherd, M. Durán-Castillo, C.E. Jeffree, and S. Cavers. 2020. Invasion, isolation and evolution shape population genetic structure in Campanula rotundifolia. AoB PLANTS 2020(12) No. 2.