We offer a number of rotating workshops hosted by local experts.

Introduction to Carex (Sedges) Workshops (Spring 2024)

picture of carex                               

Workshop 1: March 11, 2024  [FULL]                                  Cal Poly Humboldt 9am - 5pm

Workshop 2: March 12, 2024                                        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: $150 for California Native Plant Society (CNPS) or Natural History Museum (NHM) members, or students, and $175 for non-members/non-students. 

Registration: Registar online here or in person at the Natural History Museum of Cal Poly Humboldt (1315 G Street, Arcata, CA 95521).  If the course day your are trying to register for is full, you may join 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  Course content questions can be sent to Gordon Leppig



Tracking Workshops: (Fall 2019/Spring 2020)

Cost $25, NHM members $20, seniors and students (w/ID) $15

Phil is a very passionate and skilled senior tracker. During these workshops you learn a lot more than matching animal tracks to a certain species. Information about animal behavior, diet, gait patterns, habitats, and much more are discussed. Your senses will be opened up to the world of our local wildlife. Workshops are limited to 24 people and are geared towards young adults and older.

CyberTracker website:

Phil's website