References

For Abelia

Christenhusz, M.J.M. 2013. Twins are not alone: a recircumscription of Linnaea (Caprifoliaceae). Phytotaxa 125: 25-32. Google Scholar

Hofmann, U., and V. Bittrich. 2016. Caprifoliaceae. In Kadereit, J.W., and V. Bittrich. 2016. The families and genera of flowering plants. XIV. Flowering plants – Eudicots – Aquifoliales, Boraginales, Bruniales, Dipsacales, Escalloniales, Garryales, Paracryphiales, Solanales (except Convolvulaceae), Icacinaceae, Metteniusaceae, Vahliaceae. Springer, Berlin. 412 pp. Google Scholar