Butler, J.
- A.C. Cline Correspondence: General - F. 1936-1943
- Food Web of Sarracenia Purpurea in United States and Canada since 1999. 1999-2011
- Nitrogen Cycling Dynamics in Sarracenia purpurea at Harvard Forest 2004-2005. 2003-2005
- Pitcher Plant Samples 2005. 2005
- Proposal: Collaborative Research: Moths, ants, and carnivorous plants: the spatial dimension of species interactions. 2005-2014