Southeastern Arizona plant common names that begin with J.
- Jackass Clover
- Janusia, Slender
- Jatropha, Ragged
- Jerusalem Thorn
- Jewelflower, Arizona
- Jewelflower, Lyreleaf
- Jewelflower, Slender-pod
- Jewels of Opar
- Jewels-of-Opar
- Jimsonweed
- Jointfir, Longleaf
- Jojoba
- Jones Stickleaf
- Jones' Blazingstar
- Jumping Cholla
- Jumping Cholla
- Juniper Mistletoe
- Juniper, Alligator
- Juniper, One-seed
- Juniper, Oneseed