Robert Knud Friedrich Pilger (3 July 1876, Helgoland – 1 September 1953, Berlin) Universität Zürich UZH Zürcher Herbarien - Sammler Details was a German botanist, who specialised in the study of conifers.

He collected plants in the Mato Grosso of Brazil, and from 1945 to 1950 was director of the botanical garden at Berlin-Dahlem.Google Books CRC World Dictionary of Grasses: Common Names, Scientific Names ..., Volume 1 by Umberto Quattrocchi

The genera; Pilgerodendron Florin (Cupressaceae),The Gymnosperm Database Pilgerodendron uviferum Pilgerina (family Santalaceae), and Pilgerochloa Eig (Poaceae) are all named in his honour.

Selected bibliography Pilger, R. (1926). Phylogenie und Systematik der Coniferae. In: Engler, A., & Prantl, K. A. E. (eds.). Die natürlichen Pflanzenfamilien XIII. Leipzig. Pilger, R. (1926). Pinaceae. In: Urban, I. (ed.). Plantae Haitienses III. Ark. Bot. 20 (4): A15: 9–10. Pilger, R. (1931). Die Gattung Juniperus L. Mitt. Deutsch. Dendrol. Ges. 43: 255–269.

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