Zwackhia

Zwackhia is a genus of crustose lichens in the family Lecanographaceae. It has six species. The genus was circumscribed in 1855 by German lichenologist Gustav Wilhelm Körber. He assigned Zwackhia involuta as the type species; this species is now known as Z. viridis.

The genus name of Zwackhia is in honour of Philipp Franz Wilhelm von Zwackh-Holzhausen (1826–1903), who was a German botanist (Lichenology and Mycology). He was also a Military Officer as well as being a landowner near Heidelberg. He was financially independent and owned large Herbarium.

Species
As accepted by Species Fungorum;
 * Zwackhia bonplandii (Fée) Ertz (2012)
 * Zwackhia circumducta (Nyl.) Ertz (2012)
 * Zwackhia prosodea (Afzel.) Ertz (2012)
 * Zwackhia robusta (Vain.) Ertz (2012)
 * Zwackhia sorediifera (P.James) Ertz (2012)
 * Zwackhia viridis (Ach.) Poetsch & Schied. (1872)

Former species;
 * Z. involuta = Zwackhia viridis
 * Z. involuta f. taxicola = Zwackhia prosodea