Poinsettia (Yellow), is the most widely grown of all shrubby euphorbias. In Mexico, it is a straggly deciduous shrub. Inconspicuous yellow flowers are surrounded by large brilliant red floral bracts (modified leaves) in winter through spring. Contrary to conventional wisdom, poinsettia plants are not a poisonous plant. An Ohio State University study showed that a 50-pound child could eat 500 bracts and might have a slight stomach ache. However, the white sap can have allergic properties, especially for people who have latex allergies.