Arachnothryx villosa (Hemsl.) Borhidi Arachnothryx villosa (Hemsl.) Borhidi in Acta Bot. Acad. Sci. Hung. 28 (1–2): 69. 1982 sec. Lorence 2011≡Rondeletia villosa Hemsl., Diagn. Pl. Nov. Mexic.: 27. 1879 syn. sec. The Plant List 2013