👉 Penstemon is a genus of flowering plants in the family Proteaceae. It belongs to the monotypic family Penstemons, which has only one species, Penstemon esculentum. These plants are known for their large leaves and bright yellow flowers. The scientific name "Penstemon" comes from the Greek words "penos" (meaning "yellow") and "mona" (meaning "flower"). The genus "Penstemon" has been named in honor