Plants can be found in some of the most remote, inhospitable places on the planet, resulting in the evolution of creative ways to adapt to harsh environments. One adaptation used by plants are hairs, called trichomes (hydrangea trichomes seen here in this micrograph), that cover the surface of leaves. Trichomes help insulate the air surrounding leaf openings to increase humidity. They also shade from or reflect light to prevent water evaporating from leaf cells.
Looks like a flock of plastic starfish to me.
Image by Dr. Steve Lowry, Portstewart, Co.
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