Despite previous research and study – the original distribution, subsequent radiation, and genetic identity of the northern California black walnut (Juglans hindsii) has remained a source of considerable perplexity and debate. To get a clearer understanding of the northern California black walnut’s historic and current distribution as well as the rate of hybridization, researchers inventoried and genetically tested specimens from several counties. Join us in this presentation from Heath Bartosh, to learn about how this research was used in updating the conservation status of this native tree, and to hear more about the northern California black walnut’s past, present, and future.

In addition to being a consulting botanist, Heath is also a Research Associate at the University and Jepson Herbaria at UC Berkeley. After graduating from Humboldt State University, Heath began his career as a professional botanist in 2002 and has been an earnest student of the California flora for the past 15 years. In 2009, he also became a member of the Rare Plant Program Committee for CNPS. His role on this committee is to ensure the rare plant program continues to develop current and accurate information on the distribution, ecology, and conservation status of California’s rare and endangered plants, and help promote the use of this information to influence plant conservation in California.

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