Attributes / relations provided by
♦ 1Derived from
Allergy-Free Gardening OPALS™, Thomas Leo Ogren (2000)
♦ 2Arnold SEJ, Faruq S, Savolainen V, McOwan PW, Chittka L, 2010
FReD: The Floral Reflectance Database — A Web Portal for Analyses of Flower Colour. PLoS ONE 5(12): e14287.
♦ 3USDA Plants Database, U. S. Department of Agriculture
♦ 4Insect-flower associations in the high Arctic with special reference to nectar., Hocking, B. 1968. Oikos 19:359-388
♦ 5Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014).
Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.
♦ 6Mosquin, T., and J. E. H. Martin. 1967.
Observations on the pollination biology of plants on Melville Island, N.W.T., Canada. Canadian Field Naturalist 81:201-205.