Workshops
We offer a number of rotating workshops hosted by local experts.
Introduction to the Willows of California (Salicaceae) Spring 2025
Workshop 1: Saturday, April 26, 2025 Cal Poly Humboldt 9am - 5pm
OR
Workshop 2: Sunday, April 27, 2025 Cal Poly Humboldt 9am - 5pm
California is home to over one quarter of the estimated 120 willow species growing in North America. Cottonwoods and willows are the most common riparian hardwood species in California. Identification to species is often neglected because willows are thought to frequently hybridize. When only vegetative materials are available in the field, identification can be further hindered because we think we need flowers to make a positive identification. The workshop will focus on the leaf, stem, and other vegetative growth characteristics that are useful in making identification while also emphasizing differences within species across their regional distributions. The goal of the workshop is to provide a broad overview of willows, highlight vegetative characteristics used in the identification keys in The Jepson Manual (second edition) and familiarize participants with the six most common willows in California.
The workshop will include a presentation focusing on the overall willow family taxonomy, taxonomic changes in the second edition of the Jepson Manual, geographic distribution, how to look at willows to make a successful identification, and key identification characteristics. Fresh cottonwoods and willows material will be available to illustrate the variety of vegetative and flowering characteristics used in The Jepson Manual 2 keys. Bring in your problem willows and we will apply our new willow skills to identifying them together. Additionally, the instructor will provide an overview of willow family ecology and briefly cover use of willows and cottonwoods in restoration projects. Participants should bring a hand lens, dissection equipment including extra-fine forceps, and a copy of The Jepson Manual 2. All experience levels are encouraged to participate.
Cost: $35 for Cal Poly Humboldt or College of the Redwoods students; $150 for California Native Plant Society (CNPS) or Natural History Museum (NHM) members; and $200 for non-members.
Registration: Register Saturday, April 26 workshop here or for Sunday, April 27 Workshop here or in person at the Natural History Museum of Cal Poly Humboldt (1242 G Street, Arcata, CA 95521). NOTE: This is a one day workshop that is repeated twice.
About the Instructor: The workshop will be led by John Bair, who is a recognized expert in willow and cottonwood taxonomy and physiology. John has investigated the inter-relationship between riparian plant establishment, geomorphology, and hydrology to recommend flow management and channel restoration approaches. He earned his Master’s degree working with Dr. John Sawyer at Humboldt State University, analyzing riparian initiation and establishment processes on the Trinity River. His special interests include the effect of streamflow regulation on Salicaceae.
A little more about the instructor: Mr. Bair is a botanist/plant ecologist that has focused on the inter-relationship between riparian plants, geomorphology, and hydrology for 22 years. He is a recognized expert in willow and cottonwood taxonomy. He has developed flow management and channel restoration approaches that improve the ecosystem conditions on regulated rivers. Mr. Bair has developed the Tool for Achieving Riparian Germination and Establishment of Target Species (TARGETS-2D) model to assess the success of managed streamflows at promoting the colonization of floodplains. The model is based on the relationship between seed dispersal period of riparian hardwoods, root growth rate, soil capillarity, channel topography, and streamflow magnitude and recession rate. The model has been applied successfully on many rivers in California. He has developed riparian restoration strategies to combine active revegetation (i.e., plantings) with passive opportunities provided through streamflow management throughout Northern California and the Central Valley and designs that combine active revegetation with passive opportunities provided through tidal restoration in estuaries, coastal streams and rivers. Mr. Bair conducts and oversees study design, field data collection, plant ID, mapping and classification, and analyses of environmental variables. He has supported private, tribal, state, municipal, and federal agencies to clarify requirements and restrictions related to the implementation complex and large scale river restoration.
Polymer Clay Sculpting Middle School After-School Workshop
Polymer Clay Sculpting Middle School After-School Workshop Description: We are meeting on Wednesday April 2nd after school at 3:30 pm to 5 pm for a polymer clay sculpting class. We are focusing on middle schoolers because they are so talented, inspired, and have the ability to learn strong techniques. The participants can choose the subject they would like to make, and we have lots of reference animals and pictures in the museum to work from. All skill levels are welcome and we strive to create a supportive environment for individuals and art expression. We focus on where participants are at, and add tools or suggestions to their process. We have all the materials and can bake the creations so they may last. Polymer clay encourages smaller and highly detailed creations, there is always more to learn and try. Please feel free to reach out with any questions to natmus@humboldt.edu, we really look forward to seeing you!
Cost: $20 per participant per workshop, no refunds
Registration: Register online here or in person at the Natural History Museum of Cal Poly Humboldt (1242 G Street, Arcata, CA 95521), or by calling us at (707) 826-4480.
About the Instructor: Erielle Laura is a local artist and museum staff. She has a lot of fun creative prompts and can’t wait to inspire the next generation :)
Introduction to Carex (Sedges) Workshops (Spring 2025)
Workshop 1: March 17 ,2025 [FULL] Cal Poly Humboldt 9am - 5pm
Workshop 2: March 18, 2025 [FULL] Cal Poly Humboldt 9am - 5pm
Carex is the most speciose genus of flowering plants in California and North America, with over 80 taxa on the North Coast alone. It is also the largest genus of US Army Corps wetland indicator plants in California and the US. As well, there are more rare taxa in the genus than in any other genus in Northern California. Thus, the ability to sight-recognize and efficiently key sedges is critical to conducting wetland delineations, habitat assessments, rare plant surveys, and vegetation typing, as well as implementing habitat restoration and management plans.
With a strong emphasis on Northern California taxa, this workshop offers an intensive immersion into sedge terminology and morphology, and focuses on the identification and ecology of coastal and inland taxa. It begins with a basic review of sedge biology, morphology, and keying terminology. The rest of the workshop will be dissecting and keying specimens using a microscope and the Jepson Manual 2nd. Ed. or Jepson eFlora.
Workshop Objectives: This introductory workshop is suitable for those with beginning to intermediate experience with keying Carex. Principal workshop goals are to 1) increase understanding of common morphological terms used in the Jepson Manual 2nd. ed., the Jepson eFlora, and other floras; 2) demystify challenging or unclear key couplets; 3) review several complexes of similar or closely-related taxa, and; 4) increase familiarity with and improve sight-recognition of many common and rare Northern California taxa.
Cost: $35 for students $150 for California Native Plant Society (CNPS) or Natural History Museum (NHM) members, or students, and $200 for non-members.
Registration: The class is full, however you can add yourself to the waitlist here.
About the Instructor: Gordon Leppig is a retired Senior Environmental Scientist with the California Department of Fish and Wildlife and has been a student of sedges and wetland plants for over 30 years. He has taught CNPS Sedge workshops since 2003.
Questions: Registration questions can be sent to the Natural History Museum at natmus@humboldt.edu Course content questions can be sent to Gordon Leppig gtl1@humboldt.edu
