Rose of Sharon, which is a form of Hibiscus, comes in both shrub and tree forms.
 

Shrub form

Blush Satin – 8-12’ tall x 6-10’ wide; mid-summer bloom of single blush pink flowers with dark red eyes

Lavender Chiffon – 8-12’ tall x 6-10’ wide; early August through September blooms of single lavender flowers with lacy, frilly centers

Minerva – 8-12’ tall x 6-10’ wide; mid-July bloom of single lavender flowers with dark red throats

Tree form

Aphrodite – single pink flowers with dark red throat; 8-10’ tall

Ardens – Double blue flowers; 8-10’ tall

Lucy – Double red flowers; 8-10’ tall