283 
LAMIACEAE 
+Mentha x gentilis L. [S, G: M. x cardiaca Gerarde ex Baker] 
M. arvensis x M. spicata) (Lebeau, 1974) (note that 
although the designations "nothomorph" and 
"subhybrid" used by Lebeau and some other authors 
are not used here, the rationale for combining all of 
the interspecific hybrid morphs of the same parentage 
under a single hybrid epithet is accepted), p. 13 
¢Mentha x piperita L., peppermint, bergamot mint [S, M: incl. M. 
citrata Ehrh.] (M. aquatica x M. spicata) (Lebeau, 
1974), p. 1306 
LILIACEAE 
*¢Narcissus x medioluteus Miller, daffodil [N. x biflorus Curtis] 
(N. poeticus x N. tazetta) (Miihlenbach, 1979; D. A. 
Webb, 1980) 
POACEAE 
+Hordeum x caespitosum Scribner, bobtail barley [S: 1. jubatum 
var. caespitosum (Scribner) A. Hitche.] (H. 
brachyantherum x H. jubatum) (Mitchell and Wilton, 
1964), p. 13 ; 
Muhlenbergia x curtisetosa (Scribner) Bush [S: M. schreberi J. 
Gmelin var. curtisetosa (Scribner) Steyerm. & Kucera] 
escribe 
; Muhlenbergia species) (Pohl, 1969), 
Tridens x oklahomensis (Feath.) Feath. ex Chase (T. flavus x T. 
strictus) (Schuckman and Kucera, 1984), p- 120 
; ! k 
S: Steyermark G: Great Plains Flora M: Mohlenbroc 
