N.W.Sawyer, ?Novon 11(4): 461 (-462). 2001 [7 Dec 2001]?, 2001.

N.W.Sawyer, ?Novon 8: 72, fig. 1998?, 1998.

N.W.Sawyer, ?Novon 11(4): 463 (fig. 2). 2001 [7 Dec 2001]?, 2001.

N.W.Sawyer, ?Novon 8: 74, fig. 1998?, 1998.

N.W.Sawyer, ?Brittonia 59(1): 54 (-56; fig. 1). 2007 [30 Mar 2007]?, 2007.