Complex sentence: The bowl-shaped flowers have four petals usually one to two centimeters long and in shades of pink, purple, or deep wine red, often with a streak or spot of pink or red in the middle.
Split into simpler sentences: The bowl-shaped flowers have four petals, usually one to two centimeters long. They are in shades of pink, purple, or deep wine red; often with a streak or spot of pink or red in the middle.