I saw this posted on someone's page and I thought that's not a Matisse, but I can't find the original artist. It seems popular, often copied, and commonly believed by hobbyists to be a Matisse. If told this I imagine many saying, "If he didn't paint it, he should of!" Broadly, the Matisse style seems mid 1910s wedded to his mid 1940s. If you know I'm wrong, please let me know.