There were 4 illustrations found for C. Halm
Telephium sp.J.P. de Tournefort, Inst. Rei Herb., vol. 2 : t. 128 (1700)
Apocynum sp.Ann. Missouri Bot. Gard., vol. 94 : p. 477, fig. 1A,B (2007) [C. Halm]
Periploca sp.Ann. Missouri Bot. Gard., vol. 94 : p. 477, fig. 1C,D (2007) [C. Halm]
Secamone sp.Ann. Missouri Bot. Gard., vol. 94 : p. 477, fig. 1E,F (2007) [C. Halm]
Asclepias sp.Ann. Missouri Bot. Gard., vol. 94 : p. 477, fig. 1G-J (2007) [C. Halm]