What materials were used to paint geraniums by Henri Matisse?

Henri Matisse primarily used oil paints for his depictions of geraniums, often applying vibrant colors directly from the tube. He frequently employed a technique known as "fauvism," which emphasized bold, non-naturalistic colors and strong brushwork. Additionally, Matisse sometimes incorporated other media, such as gouache and collage, to enhance his compositions, but oil paint remained his primary medium for painting flowers like geraniums.