Mexican pricklypoppy (Argemone mexicana) is a native Florida landscape weed. Young plants are often mistaken for thistles due to their prickly and toothed leaves. When broken, plants exude a yellowish-milky sap. 

• Scientific Name: Argemone mexicana 
• Common Name: Mexican pricklypoppy; Goatweed; Mexican thistle; Yellow Thistle; Prickly Poppy 
• Seasonality: Warm
• Soil Type: Dry
• Toxicity: Toxic to livestock, people, and pets
• Plant Habitat: Annual
• Mexican Prickly Poppy: Biology and Control

• Relevant Resources

  UF/IFAS Extension Publication - Mexican Prickly Poppy: Biology and Control

  USDA Plant Profile

  Florida Native Plant Society: Yellow Prickly Poppy

  Florida Wildflower Foundation: Mexican Prickly Poppy