• Welcome to the U.S. National Arboretum
• About
  • Who We Are (About the Arboretum)
  • Strategic Plan
  • Mission
  • Internships
    • Research Internships 2024
    • Horticulture Internships 2024
    • Bonsai Apprenticeship 2024
    • Herb Garden Internship 2024
  • Facilities Use
    • Weddings
  • Photography
  • Contact
• Visit
  • Calendar of Events
    • Cultivated Stones: Chinese Scholars' Rocks from the Kemin Hu Collection
    • Ring in the New Year: Japanese Bell Dedication Ceremony
  • Hours And Directions
  • Map of Arboretum Grounds
  • Rules and Guidelines
  • Teachers
• Discover
  • Plant Finder & Interactive Map (ABE)
  • Gardens & Collections
    • Administration Building
    • Asian Collections
    • Azalea Collections
    • Dogwood Collection
    • Fern Valley
    • Friendship Garden
    • Gotelli Conifer Collection
    • Holly and Magnolia Collections
    • National Bonsai & Penjing Museum
    • National Boxwood Collection (temporarily closed)
    • National Capitol Columns
    • National Herb Garden
    • Perennial Collections (temporarily closed)
    • Washington Youth Garden
    • Stately Treasures
  • Protecting our Venerable Weeping Japanese Cherry Trees
• Science
  • Our Scientists
    • Office Support Staff
    • Support Staff
  • Plant Hardiness Zone Map
  • Plant Introductions and Releases
    • Plant Introductions - Listed by Genus (A - L)
    • Plant Introductions - Listed by Genus (M - V)
    • Plant Introductions - Listed by Common Name (A - L)
    • Plant Introductions - Listed by Common Name (M - W)
    • Rhododendron Introductions
    • Plant Introduction Fact Sheets and Award Winners
    • Plant Introduction Posters
  • U.S. National Arboretum Herbaria
  • International Cultivar Name Registration
    • Cercis ICRA
    • Lagerstroemia ICRA
• Support
  • Direct Contributions
  • Support Groups
  • Volunteering
• Widgets