Douglas M. Ladd (Ladd)
Research interests: botany and lichens of Missouri
Botantist and Lichenologist
The Nature Conservancy
2800 S. Brentwood, St. Louis Missouri, USA 63144-2712
Author of following lichens:
Hertelidea pseudobotryosa R.C.Harris, Ladd & Printzen
Punctelia missouriensis G. Wilh. & Ladd
Punctelia perreticulata (Räsänen) G. Wilh. & Ladd
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