Simplify the following text for a Grade 12 native English-speaking person.
Original: Many other camellias are grown as ornamental plants for their flowers ; about 3,000 cultivars and hybrids have been selected , many with double flowers , as in the gallery below .
Simplified: Today many other camellias are grown as ornamental plants for their flowers ; about 3,000 cultivars and hybrids have been selected , many with double flowers .