Johann Kellerer
Kellerer
December 27, 1859 – March 05, 1938
botanist
Austrian and Bulgarian botanist (1859-1938)
http://www.wikidata.org/entity/Q21341647
Austria-Hungary Bulgaria
Has collected specimens later identified by:
Joseph Friedrich Nicolaus Bornmüller
February 06, 1862 – December 19, 1948
Germany; Duchy of Saxe-Meiningen
Collected Asteraceae and identified Asteraceae