An annual series of lectures held from late fall to early spring that explore a wide variety of fascinating topics. Lectures are supported in part by the Klein Lecture Endowment given in memory of Dr. William M. Klein who served from 1977-1990 as the Arboretum’s first full-time director, the Laura L. Barnes Lecture Endowment of The Philadelphia Foundation, given in memory of Laura Barnes by students and alumni of her school of horticulture, and the Byron Lukens Lecture Endowment, given in memory of educator and Arboretum volunteer, Byron Lukens and his wife Elizabeth.
Dr. Mark Raupp, Professor of Entomology at University of Maryland
WEDNESDAY, OCTOBER 10 | 2:00 pm
How does global warming affect us and other creatures on earth? Join internationally recognized expert Mike Raupp as he reviews evidence for and possible causes of climate change. See how warmer temperatures alter the geographic ranges of insect pests, their seasonal life cycles, and interactions among plants, animals that eat plants, and their natural enemies. Learn about invasive species and urban heat islands. An entomology professor at the University of Maryland and Science Channel Expert, Mike has more than 250 publications and has made more than 1,200 presentations on the ecology and management of insects and mites. His most recent book, 26 Things that Bug Me introduces youngsters to the wonders of insects and natural history, while Managing Insect and Mites on Woody Landscape Plants is a standard for the arboricultural industry.
The Lukens Endowed Lecture is presented annually in memory of educator and Arboretum volunteer Byron Lukens and his wife, Elizabeth.
WEDNESDAY, NOVEMBER 7 | 2:00 pm
Born in 1905, George Nakashima was an American woodworker, architect, and furniture maker based in nearby New Hope, Pennsylvania. He was a leader in 20th century furniture design and one of the fathers of the American craft movement. Since his death, his daughter Mira Nakashima has continued to define her father’s legacy. In this lecture, Mira will provide an overview of George Nakashima’s life before woodworking, and discuss the processes involved in envisioning and creating a piece of furniture. Mira was born in Seattle, Washington in 1942, incarcerated with her family at Minidoka on the Idaho Desert and moved to New Hope in 1943. She graduated from Harvard University and received a Master’s degree in Architecture from Waseda University in Tokyo.
The Barnes Endowed Lecture is presented annually in memory of Laura L. Barnes, founder of The Barnes Foundation Arboretum. This lecture will be held at the Ambler Theater, 108 E. Butler, Ave., Ambler, PA.
Dr. Richard Olsen, Director of the U.S. National Arboretum
WEDNESDAY, DECEMBER 5 | 2:00 pm
Join us for an engaging lecture with Dr. Richard Olsen, Director of the U.S. National Arboretum. One of the world’s premier woody plant research facilities and public gardens, the National Arboretum has developed superior plants through genetic improvement, evaluation, and selection, thereby contributing to diverse and sustainable American landscapes. Learn about its valuable collections, its important collaborations with peers such as Morris Arboretum, and how exciting new ventures will continue to expand the relevance and impact of the National Arboretum.
The Klein Endowed Lecture is presented annually in memory of Dr. William M. Klein who served as the Arboretum’s first full-time director from 1977-1990.
Out on a Limb will be temporarily closed on Wednesday, April 11th until noon. Please check back for updates.
The Arboretum is open as usual. Click here for hours.
Please note that weather conditions can change quickly, check back or call (215) 247-5777 before heading out for a visit.
Weather conditions may limit garden access to certain features even if the garden is open – please check the web site or call (215) 247-5777 for updates before visiting. Our visitors’ safety in the garden is our top priority. Therefore when inclement weather is predicted, we will make decisions about closing the garden accordingly.