Lyon Arboretum Facility – FY 2007 Report


The primary focus of the Lyon Arboretum Micropropagation Laboratory is to prevent further extinction of Hawaii’s native plant species mainly through the use of in vitro propagation (tissue culture). This proposal seeks to utilize the Lyon Micropropagation Laboratory as a propagative and designated living germplasm facility, emphasizing the propagation of the Plant Extinction Prevention Program (PEP) species. The two main activities to be accomplished within the laboratory will be to propagate and multiply all of the submitted plant samples for the purpose of restoration/reintroduction, and to maintain a sufficient representation of “living” plant germplasm which will be reside as in vitro cultures. The work will be conducted in accordance and alignment with the State of Hawaii DOFAW-DLNR efforts to pursue genetic coverage for Hawaii’s critically endangered plant taxa, which includes capture of the maximum genetic diversity remaining in wild populations.


  • Between the period of July 1, 2006 and June 30, 2007, the Lyon Arboretum Micropropagation Laboratory received 516 submissions comprised of 78 native Hawaiian species. 39 (50%) of these species are federally listed as Endangered, 11 (14%) Species of Concern, 1 (1%) Proposed Endangered, and 4 (5%) Candidate.
  • Currently, there are 185 native plant taxa in various stages of propagation in inventory. Ten of these species are labeled as candidate species, 34 are species of concern, 4 are proposed, and 96 are federally listed as endangered.
  • The micropropagation inventory consists of 11,308 plants and are maintained mainly as in vitro germplasm culture collections at 3 locations: the Lyon Arboretum Micropropagation Laboratory and it’s adjacent greenhouse and at the Magoon Facilities. Sixty three percent of the laboratory’s total plant inventory are federally listed or proposed for listing.
  • Micropropagation Laboratory has sent out 458 plants consisting of 12 Hawaiian Native species for restoration/reintroduction, research, education, botanical and display garden, and forestry.
  • Six new Hawaiian endemic plant species were submitted to the Micropropagation Lab.

Additional Information

  • The Lyon Arboretum is part of the Hawaii Rare Plant Restoration Group (HRPRG), a collaborative network of various organizations, agencies, and private landowners co-chaired by Hawaii Division of Forestry and Wildlife State Botanist and the U.S. Fish and Wildlife Service Plant Recovery Coordinator. 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 Valley Audubon Center, and the Honolulu 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 many other plant conservation groups and individuals. 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 Lyon Arboretum received 930 volunteer hours this fiscal year.
  • The Micropropagation Laboratory and greenhouse received more than 221 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.