Jean Auguste Hippolyte Houzeau de Lehaie (6 March 1867 - 4 September 1959) was a Belgian biologist and horticulturist who devoted his career to the botany of bamboo species and the introduction of many into European gardening practice through his property, L'Hermitage, near Mons in the Belgian province of Hainaut. He was also a student of the temperate terrestrial orchids of Belgium and France.