Lyon Arboretum Facility – FY 2006 Report


To expand the current tissue culture, propagation, and storage of all endangered Hawaiian plants possible. Emphasis will be placed on the “Plant Extinction Program” (PEP) species in efforts to achieve complete Plant Extinction Program coverage for these living critically endangered taxa of Hawaiian plants, including capture of the maximum genetic diversity remaining in wild populations.


Between the period of July 1, 2005 and June 30, 2006, the Lyon Arboretum Micropropagation Laboratory received 313 submissions representing 83 native Hawaiian species. Fifty-seven (81%) of these species are federally listed as Endangered, 8 (12%) Species of Concern, 2 (3%) Proposed Endangered, 1 (1%) Threatened and 2 (3%) Candidate.

To date, the Lyon Arboretum Micropropagation Laboratory has successfully grown approximately 439 Hawaiian plant taxa using micropropagation techniques, of which 292 are proposed or federally listed as endangered or threatened.

The Micropropagation Laboratory has been successful in propagating 216 of the species listed in under the Statewide Endangered Plant Program.

Currently, there are 298 native plant taxa of which 268 are proposed or federally listed, in various stages of propagation, at Lyon Arboretum Micropropagation Laboratory.

The majority of the plant taxa totaling more than 10,314 plants are currently being maintained as in vitro germplasm storage collections. Sixty three percent of the laboratory’s total plant inventory are federally listed or proposed for listing.

This fiscal year, the Micropropagation Laboratory has sent out 187 plants consisting of 23 Hawaiian Native species for restoration & reintroduction, research, education, botanical and display garden, and forestry. Ninety eight percent of the plants sent out were federally listed.

Six new Hawaiian endemic plant species were submitted to the Micropropagation Laboratory.

Additional Information

The Lyon Arboretum is part of the Hawaii Rare Plant Restoration Group (HRPRG), a collaborative network of several organizations, agencies and private landowners co-chaired by the Coordinator of the Center for Plant Conservation-Hawaii Office and the State Botanist from the Hawaii Division of Forestry and Wildlife. This network includes four other Center for Plant Conservation affiliated Hawaiian botanical gardens such as the National Tropical Botanical Garden, Amy Greenwell Botanical Garden, Waimea Arboretum, and the Honolulu Foster Botanical Gardens. HRPRG also includes the Hawaii State Department of Land and Natural Resources, the U.S. Fish and Wildlife Service, the U.S. Army, the Army National Guard, the Center for Plant Conservation, The Nature Conservancy-Hawaii, private landowners, and others. Through this concerted effort, endangered and threatened Hawaiian plants can be identified, collected, monitored, propagated, and stored with the possibility of restoration as a final outcome. The Plant Extinction Prevention program (PEP), generated by the Hawaii Rare Plant Restoration Group, is a collection of plant taxa identified as “critically endangered” and given top management priority. Currently, there are approximately 165 taxa of Hawaiian plants that are “critically endangered” (50 plant remaining in the wild). Plans have been developed for a “Plant Extinction Prevention ” for all possible living plants of the 165 taxa, of which up to 20 may have become extinct in the last few years. The USFWS and the State of Hawaii- Department of Land and Natural Resources has adopted this list and uses it to direct its collections, monitoring and propagation activities.

The Lyon Arboretum received 1174.5 volunteer hours this fiscal year from an average of 6 volunteers per month.

The Micropropagation Laboratory and greenhouse received more than 196 visitors this past fiscal year. These visitations consisted of public school groups, University of Hawaii and Community College classes, interns, workshop participants, community groups, researchers, and individuals.