M. E.  Barkworth, Anderton, L. K., McGrew, J., and Giblin, D. E., ?Geography and morphology of the Bromus carinatus (Poaceae: Bromeae) complex?, Madroño, vol. 53, pp. 233 - 243, 2006.

M. E.  Barkworth, ?Miscanthus?, in Flora of North America, vol. 25, Oxford University Press, 2003, pp. 616 - 619.

M. E.  Barkworth, ?Chloris?, in Flora of North America, vol. 25, Oxford University Press, 2003, pp. 204 - 218.

M. E.  Barkworth, ?Agropyron?, in Flora of North America, vol. 24, Oxford University Press, 2007, pp. 277 - 279.

M. E.  Barkworth, ?Polypogon?, in Flora of North America, vol. 24, Oxford University Press, 2007, pp. 662 - 668.

M. E.  Barkworth, ?Phalaris?, in Flora of North America, vol. 24, Oxford University Press, 2007, pp. 764 - 773.

M. E.  Barkworth and Anderton, L. K., ?Glyceria?, in Flora of North America, vol. 24, Oxford University Press, 2007, pp. 68 - 88.

I. G.  Whipple, Barkworth, M. E., and Bushman, B. S., ?Molecular insights into the taxonomy of Glyceria (Poaceae: Meliceae) in North America?, Amer. J. Bot, vol. 94, pp. 551 - 557, 2007.