Herbert Allen Sierk (1932– ), U.S. lichenologist
- Specialist on the lichen genus Leptogium
IPNI Standard Form: Sierk
Address (in 1964): Dept. of Botany, MacMurray College, Jacksonville, Illinois
Publication
Sierk, H.A. 1964. The genus Leptogium in North America north of Mexico. The Bryologist 67(3): 245–317.
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