"People deserve the freedom to enjoy and pursue their own fascination with the natural world."


Ray Collett Rare and Extraordinary Plant Lecture Series for 2019

Julie Evens
California's Botanical Landscapes
Saturday, May 18, 2019
7:00 pm in Horticulture II Building
Free community event and free parking
Donations welcome
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Julie will discuss her roots at UC Santa Cruz from being an intern at the Arboretum, experiencing the natural history field quarter, to collecting and drawing desert plants. Since then, she's fortunate to work with many CNPS scientists to develop methods for sampling and mapping vegetation patterns and for describing them in A Manual of California Vegetation. This collective knowledge base of documenting the myriad vegetation types across California's majestic landscapes -- including the Mojave Desert and south coastal California, to the Sierra Nevada and its foothills, to the Central Valley and Bay Area -- helps their continued protection and management.  She will showcase this richness, which culminated in a recent publication of California's Botanical Landscapes.
Julie Evens is the Vegetation Program Director for the California Native Plant Society (CNPS). She and her team maintain standard methods for surveying, classifying, and mapping vegetation in California. Julie provides public workshops on these vegetation methods, archives and analyzes vegetation data, and works collaboratively with agencies and CNPS chapters on vegetation mapping projects across the State. Julie is co-author of the second edition of A Manual of California Vegetation. Julie has a M.A. degree from Humboldt State University, and she holds two B.A. degrees from the University of California, Santa Cruz, in Biology and Environmental Studies. She previously worked for federal and state agencies including the National Park Service, US Geological Survey, University of California, and Department of Fish & Wildlife.
View/download flyer for this event. (PDF)
For more information please call 831-502-2998
Directions to the Arboretum.

 


Collett Lecture Archive

Stuart Hall
The Fynbos Vegetation of the Cape Region of South Africa
Monday, April 22, 2019
7:00 pm in Horticulture II Building
Free community event and free parking
Donations welcome

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The Fynbos vegetation of the Cape Floristic Region in South Africa contains some of the highest plant species richness of anywhere in the world. The variety of ways in which plant species are adapted to survive periodic wildfires, specialized pollination interactions, and unique seed dispersal techniques have influenced the extreme diversity of plant species and high rates of narrow-range endemism in the region. However, the combined impacts of habitat loss, invasive species intrusion, and climate change have resulted in many Fynbos plant species, and entire plant community becoming threatened with extinction today. 

Join botanist Dr. Stuart Hall during his visit to Santa Cruz from South Africa to learn more about conservation methods in this important region. He will discuss Fynbos ecology, threats to the region, and conservation initiatives--including how institutions such as botanical gardens can be centers of collaboration, combining research, conservation, and horticulture.

Stuart Hall is a botanist specialized in restoration ecology and dabbling in horticulture, he's always keen to share knowledge and learn something new about the natural world. His Ph.D. focuses on restoration of a highly threatened Fynbos vegetation type following invasive alien plant removal, and has worked at Stellenbosch University Botanical Garden for much of last year improving the garden's collection of locally endemic and threatened species, as well as developing better links with in-situ conservation projects in the local region. 

View/download flyer for this event. (pdf)
For more information please call 831-502-2998
Directions to the Arboretum.

Jeff Bisbee
California Dreaming: Ceanothus
Wednesday, February 20th, 2019
7:00 pm in Horticulture II Building
Free community event and free parking
Donations welcome
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In this presentation, the sub-genera Cerastes and Ceanothus, especially the large concentration of species in the North Bay Area counties, will be explored. Identification of the low growing and prostrate species in the Sierra Nevada and Northwestern California, which have been the source of much debate and confusion, will be discussed with some interesting conclusions.

A self taught botanist and nature photographer, Jeff's photos have been featured in many books, such as "Conifers Around the World" and "Field Guide to Manzanitas".  Raised in the Sierra Foothills, Jeff developed an interest in plants and began cultivating them in his  yard, where he could observe them closely.  Currently, Jeff is cultivating dozens of conifer species from Mexico and the western United States, along with many species of Arctostaphylos and Ceanothus.
View/download flyer for this event. (pdf)
For more information please call 831-502-2998
Directions to the Arboretum.

Liv O'Keeffe
What People Don't Know
Lessons from Two Years with the California Native Plant Society
Thursday, November 1, 2018
7:00 pm in Horticulture II Building
Free community event and free parking
Donations welcome

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In 2016, marketing and communications professional Liv O'Keeffe left a thriving corporate career for a once-in-a-lifetime chance to join one of the worlds' most influential botanical conservation organizations. Hear the three things that blew her mind and what she wants every Californian to know. Liv O'Keeffe was born and raised in California, where she nicknamed her first houseplant at age 8, caught polliwogs at the nearby swamp, and imagined the natural world to be her Narnia. A journalist by trade, she went on to become a digital and content strategist, most recently serving as the digital marketing director for the Northern California-based Sutter Health, an organization of 50,000 employees. Today, she is the Senior Director of Communications and Engagement for the California Native Plant Society where she's working to help her fellow humans appreciate the intersection between our deep need for beauty, our native plants and places, and, ultimately, our survival.

View/download flyer for this event. (pdf)
For more information please call 831-502-2998
Directions to the Arboretum.


Matt Ritter, Ph.D
discussing his new book:
"
California Plants: A Guide to Our Iconic Flora"
Saturday, May 19, 2018
7:00 pm in Horticulture II Building
Free community event and free parking
Donations welcome
Matt Ritter
Matt Ritter, Ph.D
Dr. Matt Ritter is a botany professor in the Biological Sciences Department at Cal Poly in San Luis Obispo, California, where he studies Californias native plants and cultivated trees. Hes the author of several books, including the funniest and best-selling guide to Californias urban forest: A Californians Guide to the Trees Among Us. California Plants is the definitive field guide for exploring California's spectacular flora. It features over 300 pages with more than 500 species described or photographed, more than 1,000 full-color photographs,150 species range maps, detailed descriptions, and fascinating natural history.

View/download flyer for this event. (pdf)
For more information please call 831-502-2998
Directions to the Arboretum.

"Observations from an Original Australian Garden:
the Weird and Wonderful Birds of Australia"
Thursday, February 22, 2018
7:00pm in Horticulture II Building
Free community event and free parking
Donations welcome

Featuring Bruce Lyon, Ph.D, UCSC Professor of Ecology and Evolutionary Biology

Bruce Lyon
Bruce Lyon
Australian plants are distinct and, in some cases, even bizarre compared to what we are used to in our own flora, but what about the birds that associate with these plants in Australia?  What are these birds like? Going to Australia to study and observe birds is like going to avian Mars..I will show a selection of photographs from a month-long visit in 2016 where I had the opportunity to immerse myself completely in the natural history of Australian birds. I will cover some of the broad-brush features that make Australia’s birdlife different from most other places and present natural history vignettes of a few of the more charismatic species to give a sense of the diversity of birds and their behaviors and breeding systems that one might see in a typical temperate Australian woodland.
Flyer for this event. (pdf)
For more information please call 831-502-2998
Directions to the Arboretum.

"Conserving plants on a changing planet"
Sunday, February 18, 2018
5:00 pm in Horticulture II Building
Free community event and free parking
Donations welcome

Featuring Evan P. Meyer, Assistant Director, Mildred E. Mathias Botanical Garden, University of California, Los Angeles
Evan Meyer
Evan Meyer

     It is no secret that a large portion of the world’s biodiversity is in an extremely perilous position. The variety of threats facing wild organisms require a corresponding variety of solutions. One of the most critical threats, the loss of habitat, can be addressed through the preservation of wildlands (in-situ conservation).  The other side of the coin, ex-situ conservation, seeks to protect individual species by maintaining and augmenting their populations outside of their natural habitats. The marrying of these two approaches is known as integrated plant conservation. Join Evan as he shares examples of how these efforts are being carried out in Southern California and discuss his belief that preserving biodiversity for future generations will require creativity, humility, and adaptation to the realities of a changing planet.

Read/download flyer for this event.
For more information please call 831-502-2998
Directions to the Arboretum.



Hugh Safford
Hugh Safford
"The campos de altitude of southeastern Brazil: the ramifications of global change for conservation and management of a unique ecosystem"
Thursday, October 26, 2017
7:00 pm in Horticulture II Building
Free Event and Free parking
Donations welcome.

Presentation by Ecologist Hugh Safford, Regional Ecologist for the USDA-Forest Service’s Pacific Southwest Region.

"The campos de altitude are cold, humid grass- and shrubland ecosystems found on the summits of the highest peaks in southeastern Brazil. Campos de altitude constitute terrestrial island habitats inserted in the matrix of the Atlantic rainforest, and their flora and fauna are the result of ecological and evolutionary interactions between geographic isolation and colonization and extinction events driven by past climatic changes. Many rare taxa are restricted to the campos de altitude, and their conservation status is already precarious. In the face of climatic warming, the survival of many of these high mountain taxa is at stake because the geographically closest habitats that are climatically similar are thousands of miles away, in other nations.
I summarize the climatic history and vegetation dynamics of the campos de altitude since the Last Glacial Maximum, as well as projections of the climate and vegetation response in southeastern Brazil for the 21
st century. Response of vegetation to rapid warming at the Pleistocene-Holocene boundary suggests that projected future climates may lead to the loss of a large part of the campos de altitude area by the end of the century. In conclusion, I consider some of the management choices that will have to be made if at least some of the rare taxa found in the campos de altitude are to be saved."

Lee and Lincoln Taiz
"Flora Unveiled: The Discovery and Denial of Sex in Plants"
Tuesday, May 9, 2017
7:00 pm in Horticulture II Building
Free Event and Free parking
Donations welcome.

Historians have long marveled at the incredibly long delay before sex in plants was finally discovered at the end of the seventeenth century.  The delay is especially remarkable when you consider that sex in animals was discovered at least 14,000 years earlier.  Why did it take so long to discover sex in plants, and why, after it’s proposal and experimental confirmation, did the debate continue for another 150 years?  The ancient belief that plants are unisexual and female can be traced back as far as the Paleolithic and Neolithic periods,  and this is a gender bias that Lincoln and Lee explore in Flora Unveiled. 

Lincoln Taiz is Professor Emeritus at the Department of Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, and a Fellow of the American Society of Plant Biologists. 

Lee Taiz, a research biologist specializing in electron microscopy, co-authored numerous papers on plant biology and on the history of science while on the staff of the Cell and Molecular Biology Department at the University of California, Santa Cruz. 

Lincoln and Lee Taiz will be signing books after the lecture.

Download flyer for this event. (pdf) For more information please call 831-502-2998
Directions to the Arboretum.

erin riordanCalifornia's Flora Under Threat:
Incorporating Climate Change into Natural Resource Planning
Monday, February 20, 2017
7:00pm in Horticulture II Building
A presentation by Erin Riordan, Ph.D.

Dr. Riordan studies climate change impacts on California’s native flora, and how these will affect conservation. Her work evaluates the future role of the NRS under changing conditions. Riordan received her PhD from UCLA, studying projected climate change impacts and land use changeon California sage scrub, a highly threatened plant community in southern California and northwestern Baja California. She also worked with the UC Natural Reserve System and professors David Ackerly at UC Berkeley and Phil Rundel at UCLA. She is continuing her work modeling climate impacts on species in rare natural communities from coastal and montane regions in California.

Click to download event flyer (pdf).  For more information please call 831-502-2998
Directions to the Arboretum.



John Thompson
Relentless Evolution: Of Plants and Their Partners
Thursday, November 10, 2017
7:00pm in Horticulture II Building
Free Event and Free parking
A presentation by John Thompson, UCSC Professor of Ecology and Evolutionary Biology. 
Abstract from Dr. Thompson: We now know that plant species continually evolve, sometimes at astonishingly fast rates and sometimes at slower rates, but they are always evolving. That affects how we think about the conservation of species, the management of invasive species, and the ever-changing web of life. This presentation will cover what we are learning about the relentless co-evolution of plants and their pollinators and enemies across the landscapes of California and far western North America. 

Jewels of the Garden:
A Darwinian Natural History of Hummingbirds
Tuesday, August 23, 2017
7:00pm in Horticulture II Building
Free Event and Free parking
Donations welcome.

bruce lyonFeaturing Bruce Lyon, UCSC Professor of Ecology and Evolutionary Biology

This presentation will explore hummingbird natural history from the perspective of a scientist who studies bird ecology and evolution, answering questions such as:
  • What are the different ways that hummingbird species make a living?
  • How do plant features shape the evolution of hummingbird adaptations?
  • Is there a limit to the number of hummingbird species that can be packed into one location?
Abstract from Dr. Lyon: I will explore hummingbird natural history from the perspective of a scientist who studies bird ecology and evolution. I will start with a brief overview of the discovery of hummingbirds, some of their unique features and their evolutionary diversification. I will then consider an amazing feature of Arboretum—its extraordinary number of hummingbirds. A survey of the different nectar-feeding birds from around the world, and the flowers they feed on, makes us realize that we have a biogeographic mismatch: New World nectar-eating birds feeding on Australian plants that evolved with a completely different cast of nectar-eating characters. More generally, all hummingbirds have very close relationships with flowers so we will explore some of the most interesting ecological and evolutionary relationships between hummingbirds and the flowers they visit and pollinate. What are the different ways that hummingbird species make a living? How do plant features shape the evolution of hummingbird adaptations? Is there a limit to the number of hummingbird species that can be packed into one location? Hummingbirds also make wonderful subjects for scientific studies, particularly for investigating how animals see the world and make foraging decisions (what to eat, where to eat it and when to it). Hummingbirds are easily trained to visit artificial feeders, which can then be altered to offer different food rewards or the cues the birds use to find their food plants. I will end the talk with a summary of a couple of these intriguing studies. 

Click to read/download event flyer (pdf).


Botanizing the Pacific Islands of Baja California, Mexico
Tuesday, January 19, 2017
7:00pm in Horticulture II Building
Free Event and Free parking
Donations welcome.

Featuring Vince Scheidt, San Diego Biologist. 
Vince Scheidt San Diego BiologistVince Scheidt is a consulting environmental biologist based in San Diego, California. He specializes in botany and herpetology, but enjoys all aspects of natural history. Vince has owned his own biological consulting practice since 1980, providing biological surveys for to the local community on a full-time basis.