At Botanical Dimensions, we are excited to announce the public opening of our unique Ethnobotany Library here in West Sonoma County. Our collection begins with one thousand books and journals from the collection of ethnobotanist Kathleen Harrison and several other generous donors. Please come celebrate our opening day, peruse the wonderful range of books, and talk with Kat in person. We’ll share with you the richness of the books and our displays of ethnobotanical artifacts from decades of fieldwork. Our volumes include many aspects of the plant-human relationship: botany, mycology, ecology, native practices, history of food, traditional plant uses, herbalism, pharmacology, anthropology, mythology, art, ritual, shamanism, visionary species, and many diverse world views. Refreshments will be available. Come meet interesting people who love plants, mushrooms and culture. If you can’t make it this time, become a member and visit in sometime in the future.

Opening day is this Saturday, Nov 14th, 2015
12 noon – 5pm

3pm - there will be a demonstration by Saskia Wolsak about traditional cordage, and how to make string from plant material.
4pm - Kathleen Harrison will offer a welcome to the library and a glimpse of the breadth and depth of global and local ethnobotany.


The Botanical Dimensions Library is located in the town of Occidental, a 90-minute drive north of San Francisco, in lovely West Sonoma County.

Occidental Center for the Arts
3830 Doris Murphy Court, Occidental, CA 95465

See Google Map


This 4-part series will be held August-November, 2015, in Occidental, CA, on the 2nd Sunday of each month: Aug. 9, Sept. 13, Oct. 11 & Nov. 8. Cost for the full series is $310. (Limited to 25 participants.) Kat has taught this popular series several times.

Kat’s topics include all these, plus ample speculation and discussion.

Global Ethnobotany – History, Concepts, Principles & many rich examples

Beliefs, Practices, and Plant Uses Around the World

Native Californian plant practices

Form and Function: What Biology Reveals

Food, Spices & History

Plant & Mushroom Shamanism & Visionary Healing Traditions

Embodying this Knowledge in Daily Life

& Easy Plant Walks in Beautiful Local Nature

(Note that the Nov. 8 session may occur on Nov. 1 instead.) If you must miss one class session, you may attend any session in the next series, free of charge. Register and pay at Network for Good event site: Givezooks, with this link:

Nicotiana tabacum, 1887 illustration


Saturday, August 1, 2015 ~ 10am-4:30pm

~ Are you interested in plants, fungi, human culture, psychedelics, & big questions?

~ What if these species have their own ideas about what they are doing here among us, in these times?

~ Join ethnobotanist Kathleen Harrison, as she shares her observations, images & stories — from an animist point of view — in historical context.

~ If you choose to, participate in discussion on interpreting and integrating our patterns of experience.

Cost is $80/person. To be held in Occidental, West Sonoma County, CA
Register now by emailing: or at this link:

Cannabis eye, artist Nemo Boko Nemo Boko


Big Botanical Beings in Modern Culture: A speculative workshop on the roles of Ayahuasca, Magic Mushrooms, Peyote, Cannabis & Tobacco

Sunday, May 3, 2015 ~ 10am-4pm ~ Are you interested in plants, fungi, human culture, psychedelics, & big questions? ~ What if these species have their own ideas about what they are doing here among us? ~ Join ethnobotanist Kathleen Harrison, as she shares her observations, thoughts, images & stories. Cost is $80/person (workshop limited [...]

Read the full article →

2014 World Ayahuasca Conference in Ibiza, Spain

Botanical Dimensions is pleased to recommend the World Ayahuasca Conference in Ibiza, Spain, hosted by International Center for Ethnobotanical Education Research and Service (ICEERS). For three days world-renowned speakers will explore the traditional, religious, ethical, legal, and scientific aspects of this emerging global phenomenon, which originates in the Amazon. September 25-27, 2014. The conference will [...]

Read the full article →

New Hawaii travel intensive with Kathleen Harrison – Jan. 28 – Feb. 9, 2014

Announcing another great learning experience in South Kona, on Hawaii, “The Big Island” ~ Come study ETHNOBOTANY for 12 days & nights, from Jan. 28 to Feb. 9, 2014 ~ Look here LITTLE PLANET, BIG ISLAND!     Learn together about all aspects of plants, their uses, and their lore. We’ll learn in our tropical classroom, [...]

Read the full article →