There were 2 illustrations found for D. Hou
Chamaeorchis sp.H. Correvon, Album des orchidées de l’Europe centrale et septentrionale: t. 7 (1899)
sp.J. Arnold Arbor., vol. 37 : t. 13 (1956) [D. Hou]
sp.J. Arnold Arbor., vol. 37 : t. 14 (1956) [D. Hou]