Answer: marigolds

AnswerCrossword Clue
MARIGOLDS

"The Effect of Gamma Rays on Man-in-the-Moon ..." (Pulitzer-winning play)

MARIGOLDS

Garden flowers.

MARIGOLDS

Summer flowers.

MARIGOLDS
Garden flowers
MARIGOLDS
Orange-yellow blooms
MARIGOLDSMan-in-the-Moon flowers