J. Paxton, J. Lindley, Paxton’s Fl. Gard., vol. 2 : p. 0, t. 0, fig. 0 (1853)
 
P. Vallet, Jard. Roy Tres Chrestien Henry IV: t. 22 (1627)
 
A.J.O. Penzig, Fl. Litt. Médit.: t. 47 (1902)
 
S. Hedin, C.H. Ostenfeld, Southern Tibet, discoveries in former times compared with my own researches in 1906-1908 [vol. 6 part 3, botany by Prof. dr. C.H. Ostenfeld], vol. 6(3): : p. 0, t. 0, fig. 0 ()