Alexander Zahlbruckner

Austrian botanist and lichenologist (1860–1938).

Alexander Zahlbruckner (31 May 1860 – 8 May 1938) was an Austrian botanist and lichenologist who became one of the early 20th century's most influential lichen taxonomists. He spent his career at the Natural History Museum in Vienna, rising from volunteer to First Director (1918–1922). He became a leading authority through extensive fieldwork across the Austrian Alps and collaboration with European herbaria. Zahlbruckner's most enduring contributions include his comprehensive classification system for lichens, published in Engler and Prantl's work Die Natürlichen Pflanzenfamilien (1903–1926).