For Geum
Bolle, F. 1933. Eine Übersicht über die Gattung Geum L. und ihr nahestehenden Gattungen. Feddes Repertorium 72: 1-119.
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
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
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.
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.
Král, M. 1966. Die Begrenzung der Gattung Parageum Nakai et Hara. Preslia (Praha) 38: 151-153.
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.
Robertson, K.R. 1974. The genera of Rosaceae in the southeastern United States. J. Arnold Arb. 55: 303-332, 344-401, 611-662.
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.
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.
Smedmark, J.E.E. 2006. Recircumscription of Geum L. (Coluriae: Rosaceae). Bot. Jahrb. Syst. 126: 1-9.
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.
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.
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