Known as the Scarlet Rosemallow, or ironically Texas Star despite not being native to Texas, this hibiscus species can grow to 8 feet tall (commonly 4-6) with leaves that shift from the juvenile arrowhead ones shown here to thin palmate spreads (some describe it as looking like cannabis), the stems topped in blooms that can be over 4 inches across with thin oval, true scarlet petals. Like most mallows the flowers are completely edible and leaves sometimes used in teas for digestive issues, but it's best grown simply for ornamental value. Supposedly hardy to zone 6.
Available plants are seedlings currently between 4-9 inches tall.