- Acacia constricta – Whitethorn Acacia
- Acacia greggii – Catclaw Acacia
- Acer grandidentatum – Bigtooth Maple
- Caesalpinia gilliesii – Bird-of-paradise Shrub
- Carnegiea gigantea – Saguaro
- Celtis ehrenbergiana – Spiny Hackberry
- Celtis laevigata var. reticulata – Netleaf Hackberry
- Cephalanthus occidentalis – Common Buttonbush
- Chilopsis linearis – Desert Willow
- Cylindropuntia fulgida – Jumping Cholla
- Dodonaea viscosa – Florida Hopbush
- Erythrina flabelliformis – Coralbean
- Ferocactus wislizeni – Candy Barrelcactus
- Fraxinus velutina – Velvet Ash
- Gossypium thurberi – Thurber's Cotton
- Juglans major – Arizona Walnut
- Juniperus deppeana – Alligator Juniper
- Juniperus monosperma – Oneseed Juniper
- Mimosa aculeaticarpa var. biuncifera – Catclaw Mimosa
- Nerium oleander – Oleander
- Nicotiana glauca – Tree Tobacco
- Olneya tesota – Desert Ironwood
- Opuntia ficus-indica – Barbary Fig
- Opuntia santa-rita – Santa Rita Pricklypear
- Parkinsonia aculeata – Jerusalem Thorn
- Parkinsonia florida – Blue Paloverde
- Parkinsonia microphylla – Yellow Paloverde
- Pinus discolor – Border Pinyon
- Platanus wrightii – Arizona Sycamore
- Populus fremontii – Fremont Cottonwood
- Populus tremuloides – Quaking Aspen
- Prosopis velutina – Velvet Mesquite
- Purshia stansburiana – Stansbury Cliffrose
- Quercus gambelii – Gambel Oak
- Rhus lancea – African Sumac
- Robinia neomexicana – New Mexico Locust
- Salix gooddingii – Goodding's Willow
- Sambucus nigra ssp. canadensis – American Black Elderberry
- Sapindus saponaria – Wingleaf Soapberry
- Tamarix spp. – Tamarisk
- Tecoma stans – Yellow Trumpetbush
- Vauquelinia californica – Arizona Rosewood
- Yucca elata – Soaptree Yucca
Trees
Trees are tall, woody, perennial plants with a single main trunk.
Listed below are some of the trees found in southeastern Arizona.