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