Welcome to the Desert Legume Program (DELEP) Discover the mission of DELEP, a program committed to preserving legume biodiversity from arid and semi-arid regions around the globe. Exciting Update: The Desert Legume Program is now proudly administered by Boyce Thompson Arboretum! This program, previously a partnership between the University of Arizona and BTA, made a significant transition in summer 2024 when its invaluable seedbank, the heart of DELEP, relocated to Boyce Thompson Arboretum. For seed requests or inquiries, contact us directly at [email protected]. Join us in protecting and celebrating legume biodiversity!
About the Desert Legume Program (DELEP): Preserving Global Legume Biodiversity
The Desert Legume Program (DELEP) is dedicated to preserving the biodiversity of Fabaceae (Leguminosae), the third-largest family of vascular plants, with a strong presence in the floras of arid and semi-arid regions. Despite their significance, wild legumes from dry regions remain understudied in terms of their economic potential.
Legumes are second only to cereal grains in their importance to humanity, serving a wide array of purposes:
- Food crops and forage crops
- Green manure for sustainable agriculture
- Forestry and erosion control
- Sources of medicines and industrial compounds
- Shade, shelter, and landscape plants
Many legumes possess a unique ability to convert atmospheric nitrogen into a plant-usable form through symbiosis with specialized bacteria, making them vital for ecological health and sustainable farming practices.
DELEP Mission
- Seed Conservation: Acquire and preserve seeds of legumes native to the arid and semi-arid lands of the world.
- Research: Advance knowledge of the nature and utility of these species.
- Distribution: Share germplasm with professionals and individuals who have a legitimate interest.
- Conservation: Support desert legume biodiversity through in situ and ex situ preservation methods.
What DELEP Offers
DELEP serves individuals, businesses, academic institutions, and government agencies in Arizona and across the globe by providing:
- Seeds and plant material
- Expert information on desert legumes
- Access to seeds via direct contact, the USDA-ARS GRIN, and Botanic Gardens Conservation International
Facilities and Projects
- Seed Bank: A vital repository of desert legume germplasm.
- Field Evaluations and Seed Production Plots: For research and conservation.
- Taylor Legume Garden: Showcases the diversity and utility of desert legumes.
Join DELEP in our mission to protect and promote the incredible diversity and potential of legumes from some of the world’s most challenging environments. Contact us today to learn more or request seeds from our collection!
Request Seeds from the Desert Legume Program (DELEP)
DELEP offers seed samples, subject to availability, to individuals and organizations in the U.S. and internationally. Our mission is to support research, conservation, and educational projects by providing access to legume germplasm from arid and semi-arid regions.
How to Request Seeds
- Browse the Seed Bank Accessions:
DELEP’s Seed Bank Accessions lists available seeds - To Request Seeds:
- Seed requests can be directed to [email protected]
- Request Through USDA-ARS GRIN:
- Use the USDA-ARS GRIN database for advanced seed requests.
- Select “Desert Legume Program – DLEG” as the repository under Advanced Search.
International Requests
- Due to costs and logistics, DELEP cannot provide phytosanitary certificates for international requests.
- If a phytosanitary certificate is required by your country, please submit your request directly through the USDA-ARS GRIN website.
DELEP DATABASES
#1Arb
Tag us on Instagram with
@btarboretum #1Arb
You know about tree huggers - but where are the cactus huggers at? 🌵
We kid. Please don`t hug any cacti. 😅We`re sure they can feel the love from afar! You can see this towering cardón in our Cactus and Succulents Garden. See the link in our bio to plan your visit today!
#cactuslovers #cardón #naturelovers #arizonanature
Did you know that Jatropha macrocarpa (or Barbados Nut) can be used to produce biofuel? That`s because its seeds contain an average of 34% oil! If you look closely at this plant, you`ll spot little green pods. Inside are developing seeds that will mature as the pods turn yellow.
You can see this remarkable plant up close in the Smith Greenhouse. Plan your visit today!
#Barbadosnut #jatropha #plantlovers #plantfacts #naturelovers #btarboretum
Have you visited our Eucalyptus Forest? Walking through the trails is truly an immersive experience. You`ll see:
🍃Mr. Big, the largest red river gum (Eucalyptus camaldulensis) in the United States
🍃A rock labyrinth for meditation (located in Conifer Corner)
🍃Eucalyptus trees shedding bark to accommodate their rapid growth
🍃Intricate tree stumps and trunks, some of which have been turned into benches!
🍃Benson Bridge, which crosses over Silver King Wash
What`s your favorite part of the Eucalyptus Forest? Let us know in the comments! 👇
#eucalyptus #redrivergum #australianplants #labyrinthmeditation #btarboretum #ExploreNature
Something new is flowering in the Wallace Region! The Nolina nelsonii, or Blue Nolina, is a slow-growing succulent that may only bloom once in its lifetime. This plant has likely been growing for 15-20+ years, building up to this one spectacular moment. Its truly an honor to witness it`s final bloom.
Plan your visit today to see our summer blooms!
#deathbloom #bluenolina #nolina #succulentbloom #plantfacts #plantlovers
We`re hiring! Join the team that makes this beautiful garden thrive. Open positions include:
🌵 Welcome Center Sales Associate
🌵 Development Administrative Assistant
🌵 Executive Assistant
🌵 Membership Coordinator
🌵 Maintenance Technician
🌵 Marketing Strategist
Apply today at btarboretum.org/careers (link in bio). We look forward to hearing from you!
#btarboretum #superiorarizona #ArizonaHiring #openpositions #WeAreHiring
The littoral zone is the region where land and water meet! At our manmade reservoir, the littoral zone is made up of cattails, which provide habitat to birds, insects, and amphibians.
Next time you visit us, stop by Ayer Lake to see if you can spot any life among the cattails!
#aznature #naturelovers #natureeducation #littoralzone #cattails
If you hear a "tap, tap, tap" above your head while you`re hiking, it might be a Gila Woodpecker! These clever birds search for insects by pecking on tree trunks, shrubs, and even cacti.
The holes they excavate in cacti sometimes become homes for smaller birds later on, making their simple foraging behaviors greatly beneficial to our ecosystem.
#gilawoodpecker #BirdingCommunity #birding #southwestbirding #azbirding #birdinghotspot
This summer, 41 teachers from across Arizona participated in a specialized professional development program designed in partnership with @azgfd to bring hands-on science education into their classrooms.
Made possible through support from @resolutioncopper, the program equipped educators with classroom-ready lessons that connected desert ecology, STEM learning, and Arizona State Science Standards. Teachers left with:
🌱 Lesson plans
🌱 Presentations
🌱 Hands-on activities
🌱 Educational supplies including a classroom set of plants
🌱 Professional development experience they can immediately apply in their classrooms.
The impact extends far beyond a single workshop. Every teacher who participates has the potential to reach hundreds of students, creating a ripple effect that strengthens science education, environmental literacy, and stewardship in the Copper Corridor and across Arizona.