References

For Geum

Bolle, F. 1933. Eine Übersicht über die Gattung Geum L. und ihr nahestehenden Gattungen. Feddes Repertorium 72: 1-119. Google Scholar

Chapman-Lam, C.J. 2022. First North American records of Geum ×spurium and noteworthy records of three additional Geum taxa. Phytoneuron 2022-46: 1-8. Published 17 October 2022. ISSN 2153 733X Google Scholar

Hough, M. 2018. Geum ×cortlandicum (Rosaceae), a new natural hybrid plus three Geum urbanum hybrids new to the flora of New York. Phytoneuron 2018-59: 1-9. Published 13 August 2018. ISSN 2153 733X Google Scholar

Hough, M., A.V. Gilman, and C.J. Chapman-Lam. 2022. Geum ×Hainesianum (Rosaceae), a new hybrid avens from eastern North America. Rhodora 123 (993): 67-84. Google Scholar

Kalkman. 2004. In Kubitzki, K., ed. 2004. The families and genera of vascular plants. VI. Flowering plants – Dicotyledons – Celastrales, Oxalidales, Rosales, Cornales, Ericales. Springer, Berlin. 489 pp. Google Scholar

Král, M. 1966. Die Begrenzung der Gattung Parageum Nakai et Hara. Preslia (Praha) 38: 151-153. Google Scholar

Phipps, J.B. 2014b. Waldsteinia. In Flora of North America Editorial Committee. 2014. Flora of North America north of Mexico. Volume 9, Magnoliophyta: Picramniaceae to Rosaceae. Oxford Univ. Press, New York, NY. 713 pp. Google Scholar

Robertson, K.R. 1974. The genera of Rosaceae in the southeastern United States. J. Arnold Arb. 55: 303-332, 344-401, 611-662. Google Scholar

Rohrer, J.R. 2014a. Geum. Pp. 58-70. In Flora of North America Editorial Committee. 2014. Flora of North America north of Mexico. Volume 9, Magnoliophyta: Picramniaceae to Rosaceae. Oxford Univ. Press, New York, NY. 713 pp. Google Scholar

Shattelroe, M.D., P. Mangum, J.R. Ward, and M.C. Estep. 2021. Genetic diversity and population structure of the forgotten Geum, Geum geniculatum Michx. Castanea 85: 404-416. Google Scholar

Smedmark, J.E.E. 2006. Recircumscription of Geum L. (Coluriae: Rosaceae). Bot. Jahrb. Syst. 126: 1-9. Google Scholar

Smedmark, J.E.E., and T. Eriksson. 2002. Phylogenetic relationships of Geum (Rosaceae) and relatives inferred from the nrITS and trnL-trnF regions. Syst. Bot. 27: 303-317. Google Scholar

Weakley, A.S., and K.N. Gandhi. 2008. Recognition of three taxa of eastern North American “Waldsteinia,” and their appropriate names when incorporated into Geum (Coluriae; Rosaceae). J. Bot. Res. Inst. Texas 2: 415-418. Google Scholar