California Native Plant Society

CNPS Rare Plant Treasure Hunt

The Rare Plant Treasure Hunt (RPTH) is a citizen-science program started by CNPS in 2010 with the goal of getting up-to-date information on many of our state’s rare plants, while engaging chapter members and other volunteers in rare plant conservation.  Many of California’s rare plant populations have not been seen in decades and some parts of the state have seen little to no botanical exploration to date. This program helps conserve our rare flora by providing valuable data to the CNPS Rare Plant Program and the California Department of Fish and Wildlife.  Treasure Hunters can join an organized rare plant search or learn how to plan their own trips by attending one of our training events; those who already have botanical experience can start leading their own trips! You can also sign up for the mailing list to be notified of upcoming events by sending an email to .

Upcoming Events

Complete list of events is available on the RPTH event calendar.

View more upcoming CNPS events on the CNPS Horticulture Calendar.


Treasure Hunters in the desert keying out an Astragalus plant.
Photo by Amber Swanson.



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