For Astilbe
Mellichamp, T.L. 2009a. Astilbe. In Flora of North America Editorial Committee. 2009. Flora of North America north of Mexico. Volume 8, Magnoliophyta: Paeoniaceae to Ericaceae. Oxford Univ. Press, New York, NY. 585 pp.
Soltis. 2007. In Kubitzki, K., C. Bayer, and P.F. Stevens, eds. 2007. The families and genera of vascular plants. IX. Flowering plants – Eudicots – Berberidopsidales, Buxales, Crossosomatales, Fabales p.p., Geraniales, Gunnerales, Myrtales p.p., Proteales, Saxifragales, Vitales, Zygophyllales, Clusiaceae alliance, Passifloraceae alliance, Dilleniaceae, Huaceae, Picramniaceae, Sabiaceae. Springer, Berlin. 509 pp.
Zhu, W.-D., Z.-L. Nie, J. Wen, and H. Sun. 2013. Molecular phylogeny and biogeography of Astilbe (Saxifragaceae) in Asia and eastern North America. Bot. J. Linn. Soc. 171: 377-394.
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