References
For Aquilegia
Munz, P.A. 1946. Aquilegia: the cultivated and wild columbines. Gentes Herb. 7: 1-150. Google Scholar
Tamura, M. 1993. Ranunculaceae. Pp. 563-583. In Kubitzki, K., J.G. Rohwer, and V. Bittrich, eds. 1993. The families and genera of vascular plants. II. Flowering plants – Dicotyledons – Magnoliid, Hamamelid and Caryophyllid families. Springer, Berlin. 653 pp. Google Scholar
Whittemore, A.T. 1997c. Aquilegia. In Flora of North America Editorial Committee. 1997. Flora of North America north of Mexico. Volume 3, Magnoliophyta: Magnoliidae and Hamamelidae. Oxford Univ. Press, New York, NY. 590 pp. Google Scholar