- Amsinckia menziesii var. intermedia – Common Fiddleneck
- Anagallis arvensis – Scarlet Pimpernel
- Anagallis arvensis ssp. foemina – Poorman's Weatherglass
- Argemone pleiacantha – Southwestern Pricklypoppy
- Aristolochia watsonii – Watson's Dutchman's Pipe
- Asclepias asperula – Spider Milkweed
- Asclepias tuberosa – Butterfly Milkweed
- Astrolepis cochisensis – Cochise Scaly Cloakfern
- Baileya multiradiata – Desert Marigold
- Brassica tournefortii – Asian Mustard
- Caesalpinia gilliesii – Bird-of-paradise Shrub
- Centaurea melitensis – Maltese Star-thistle
- Cephalanthus occidentalis – Common Buttonbush
- Corydalis aurea – Scrambled Eggs
- Crotalaria pumila – Low Rattlebox
- Cucurbita foetidissima – Missouri Gourd
- Datura discolor – Desert Thorn-apple
- Datura wrightii – Sacred Thorn-apple
- Delphinium scaposum – Tall Mountain Larkspur
- Dodonaea viscosa – Florida Hopbush
- Equisetum hyemale – Scouringrush Horsetail
- Erodium cicutarium – Redstem Stork's Bill
- Erythrina flabelliformis – Coralbean
- Haplophyton crooksii – Cockroachplant
- Helianthus annuus – Common Sunflower
- Heliomeris longifolia – Longleaf False Goldeneye
- Heracleum maximum – Common Cowparsnip
- Isocoma tenuisecta – Burroweed
- Jatropha macrorhiza – Ragged Nettlespurge
- Linum lewisii – Lewis Flax
- Lobelia cardinalis – Cardinalflower
- Lupinus sparsiflorus – Coulter's Lupine
- Malva parviflora – Cheeseweed Mallow
- Melilotus officinalis – Yellow Sweetclover
- Modiola caroliniana – Carolina Bristlemallow
- Nerium oleander – Oleander
- Nicotiana glauca – Tree Tobacco
- Nicotiana obtusifolia – Desert Tobacco
- Nolina microcarpa – Sacahuista
- Oxalis corniculata – Creeping Woodsorrel
- Papaver somniferum – Opium Poppy
- Passiflora foetida var. arizonica – Arizona Passionflower
- Phacelia crenulata – Cleftleaf Wildheliotrope
- Phoradendron macrophyllum – Colorado Desert Mistletoe
- Plumbago scandens – Doctorbush
- Psoralidium tenuiflorum – Slimflower Scurfpea
- Rivina humilis – Rougeplant
- Robinia neomexicana – New Mexico Locust
- Rumex hymenosepalus – Canaigre Dock
- Sambucus nigra ssp. canadensis – American Black Elderberry
- Sapindus saponaria – Wingleaf Soapberry
- Solanum americanum – American Black Nightshade
- Solanum elaeagnifolium – Silverleaf Nightshade
- Solanum fendleri – Fendler's Horsenettle
- Solanum rostratum – Buffalobur Nightshade
- Verbesina encelioides – Golden Crownbeard
- Vinca major – Bigleaf Periwinkle
- Wislizenia refracta – Spectacle Fruit
- Xanthium strumarium – Rough Cocklebur
- Yucca elata – Soaptree Yucca
Poisonous Plants
Listed here are some of the wild-growing southeastern Arizona plants with poisonous or toxic parts (fruit, seeds, leaves, etc.). If a plant or plant part is not listed here, it doesn't necessarily mean that it is non-poisonous or safe to eat, it may just mean that I don't know if it is poisonous or not. Also, these plants may contain additional poisons not listed on their description pages.
Some of these poisonous plants are mainly a danger to grazing animals, while others are a danger to humans, especially those plants with either edible-looking berries (Solanum species) or drug-like properties (Datura species and Opium Poppy).