Crotalaria monteiroi is an erect, much branched shrub that ranges between0.5m and 3m tall. It is a finely hairy plant with clustered leaves and oval leaflets about 15x6mm large with blunt tips and slender short stalks about 20mm. The flowers are a small cluster of inflorescence of large-ish flowers about 20mm large and bright yellow with red streaks. The lovely yellow flowers are borne throughout the year.
Crotalaria monteiroi is loved by game and suitable for a mixed shrubbery or mixed border. The lovely flowers attract many butterflies to the garden and creates a lovely flowering display all year.