Attributes / relations provided by
♦ 1i-Tree Species v. 4.0, developed by the USDA Forest Service's Northern Research Station and SUNY-ESF using the Horticopia, Inc. plant database.
♦ 2USDA Plants Database, U. S. Department of Agriculture
♦ 3Kattge, J. et al. (2011b)
TRY - a global database of plant traits Global Change Biology 17:2905-2935
♦ 4Wood Janka Hardness Scale/Chart J W Morlan's Unique Wood Gifts
♦ 5Forest Inventory and Analysis DB version 5.1, May 4, 2013, U.S. Forest Service
♦ 6Norrbom, A.L. 2004.
Fruit fly (Tephritidae) host plant database. Version Nov, 2004.
♦ 7Anthophora abrupta Say (Insecta: Hymenoptera: Apidae), Jason R. Graham, Jamie Ellis, Glenn Hall, Catherine Zettel Nalen, University of Florida, December 2011
♦ 8Ben-Dov, Y., Miller, D.R. & Gibson, G.A.P.
ScaleNet 4 November 2009
♦ 9Robertson, C.
Flowers and insects lists of visitors of four hundred and fifty three flowers. 1929. The Science Press Printing Company Lancaster, PA.
♦ 10Jorrit 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.