? MoMA Exhibition Website

If you're not familiar with agapanthus, they're a tall flower with a ball-like head of little blue flowers on top of a tall, sturdy stem. Depending on the species, they can be about hip height. When looking at this painting, visualize some agapanthus standing on the bank of a pond, with willow trees reflecting in the water behind them, and some agapanthus showing as reflections only.