Attributes / relations provided by
♦ 1Arnold 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.
♦ 2USDA Plants Database, U. S. Department of Agriculture
♦ 3Ellenberg, H., Weber, H.E., Dull, R., Wirth, V., Werner, W., Paulissen, D. (1991)
Zeigerwerte von Pflanzen in Mitteleuropa. Scripta Geobotanica 18, 1–248
♦ 4Kattge, J. et al. (2011b)
TRY - a global database of plant traits Global Change Biology 17:2905-2935
