Chocolate Cosmos
Chocolate cosmos grown in my garden for use in my son’s wedding. Oh, chocolate…in a flower?
Velvety textured, chocolate-scented, deep maroon flowers with darker brown center on divided dark green leaves. Provide fertile, well-drained soil for care-free, fast-growing performance. Tuberous perennial. Description from Monrovia
Details on how to grow Fine Gardening
Cosmos atrosanguineus in Wikipedia, native to Mexico, extinct in the wild.