(For a complete list see here.)

Tyrl, R.J., T.G. Bidwell, R.E. Masters, and R.D. Elmore. 2008. Field Guide to Oklahoma Plants. Commonly Encountered Prairie, Shrubland, and Forest Species. 2nd Edition. Oklahoma State University, Stillwater, Oklahoma.

Tyrl, R.J. 2010. Being a method proposed for the ready finding…to what sort any plant belongeth. Oklahoma Native Plant Record 10:77-84.

Burrows, G.E. and R.J. Tyrl. 2013. Toxic Plants of North America, 2nd Edition. Wiley-Blackwell, New York.

Springer, T.L., S.A. Gunter, R.J. Tyrl, and P.F. Nighswonger. 2013. Drought and grazing effects on Oklahoma Phlox (Polemoniaceae, Phlox oklahomensis). American Journal of Plant Sciences 4:9–13.

Tyrl, R.J. and P. Shryock. 2013. Cavalcade of Field Botanists: Contributors to our knowledge of the flora and vegetation of Oklahoma. Oklahoma Native Plant Record 13:55–101.

Gard, M.E., C.R.H. York, W.F. Lowry, S. Hensley, and  R.J. Tyrl. 2014. A floristic inventory of six tracts of the Ozark Plateau National Wildlife Refuge, Adair County, Oklahoma. Proc. Oklahoma Acad. Sci. 94:59–69.

Tyrl, R.J., S.C. Barber, W.J. Elisens, J.R. Estes, P. Folley, C. L. Murray, B.A. Smith, C.E.S. Taylor, R.A. Thompson, J.B. Walker, and L.E. Watson.  2015. Flora of Oklahoma Keys and Descriptions. Flora Oklahoma Inc., Oklahoma City, Oklahoma.

Tyrl, R.J., S.C. Barber, P. Buck, J.R. Estes, P. Folley, L.K. Magrath, C.E.S. Taylor, and R.A. Thompson. (continuing publication)
Keys & Descriptions for the Vascular Plants of Oklahoma. Flora Oklahoma Inc., Noble, Oklahoma.

Burrows, G.E. and R.J. Tyrl. 2006. Handbook of Toxic Plants of North America. Blackwell Publishing, Ames, Iowa.

Crandall, R.M. and R.J. Tyrl. 2006. Vascular flora of the Pushmataha Wildlife Management Area, Pushmataha County, Oklahoma. Castanea 71:15-30.

Richards, L. and R.J. Tyrl. 2005. Dyes from American Native Plants: A Practical Guide. Timber Press, Portland, Oregon.