While Michelia is of the genus of flowering plants, what is Houttuynia?
Houttuynia Houttuynia is a genus of two species in the Saururaceae native to Southeast Asia. One species, "H. cordata", is widely cultivated as a culinary herb. The genus was originally described in 1783 by Carl Peter Thunberg when he formally described "H. cordata" as the only species. It remained a monotypic genus until 2001 when Zheng Yin Zhu and Shi Liang Zhang discovered and described a second species native to China, "H. emeiensis".
Tristellateia Tristellateia is a genus in the Malpighiaceae, a family of about 75 genera of flowering plants in the order Malpighiales. Species of this genus are woody vines or sometimes shrubs with twining branches. "Tristellateia" includes one species in eastern Africa ("T. africana" S. Moore); a second species ("T. australasiae" A. Rich.) is widespread in southeastern Asia and also commonly cultivated as an ornamental. All other species are endemic to Madagascar.