Can anyone identify this plant? It is growing in southeast Texas in full sun, sandy soil and blooms all summer. It is still blooming now. It has a round, woody stem, grows to 5' tall or more. The leaves are slightly fuzzy, serrated and alternate. The flowers have a sweet smell and attract bees and butterflies, the leaves have no scent. Normally the flowers have 5 petals but some have 6 or 7. It reseeds generously and is annual here.