Members’ meetings

Northern California Black Walnut: A tree with many stories
Speaker: Heath Bartosh
Wednesday, October 25, 7:30 pm
Location: Garden Room, Orinda Public Library (directions below)

Despite previous research and study, the original distribution, subsequent radiation, and genetic identity of the northern California black walnut (Juglans hindsii) remains a source of considerable perplexity and debate. This confusion is confounded by the perception that some northern California black walnut trees may be hybrids with other native or non-native Juglans species. To get a clearer understanding of the northern California black walnut’s historic and current distribution as well as the rate of hybridization throughout a larger portion of its range, researchers, including our speaker Heath Bartosh, inventoried specimens in a number of counties and performed genetic testing on the trees. With information from the study, an informed decision can be made on the future conservation status of this native tree, which is currently recognized as rare. Heath will summarize what we know about northern California black walnut’s past, present, and future, focusing on work done by a collaborative group of people interested in this mysterious native tree.

Heath Bartosh is co‐founder and Senior Botanist of Nomad Ecology, based in Martinez, California, as well as 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 Committee at the state level of 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.

East Bay CNPS membership meetings are free of charge and open to everyone. This month’s meeting takes place in the Garden Room of the Orinda Public Library at 26 Orinda Way (in Orinda Village). The Garden Room is on the second floor of the building, accessible by stairs or an elevator. The Garden Room opens at 7 pm; the meeting begins at 7:30 pm. Email programs@ebcnps.org or call 510-496-6016 if you have questions.

Directions to Orinda Public Library at 26 Orinda Way
From the west, take Hwy 24 to the Orinda/Moraga exit. At the end of the off ramp, turn left on Camino Pablo (toward Orinda Village), right on Santa Maria Way (the signal after the BART station and freeway entrance), and left on Orinda Way.
From the east, take Hwy 24 to the Orinda exit. Follow the ramp to Orinda Village. Turn right on Santa Maria way (the first signal) and left on Orinda Way. Once on Orinda Way, go 1 short block to the parking lot on the southeast side of the two-story building on your right. There is additional free parking beneath the building as well as on the street.From BART (4 blocks): Exit the Orinda station, turn right and cross a pedestrian bridge, then cross a second pedestrian bridge on the left. Go 1 short block on the sidewalk to the third pedestrian bridge. Go 2 blocks on Orinda Way to the Orinda Library.

Next Month’s Program
Margareta Séquin: Plants, Bugs, and Molecules
November 15, 7:30 pm: Garden Room, Orinda Public Library

Lost and Found
Did you leave a jacket in the meeting room after the April 26 meeting? If so, please contact programs@ebcnps.org to claim it.