As popular as the Nauset Light is as an Eastham tourist destination, it might have less buzz than the shining sumac nearby — at least while it’s in bloom. The loud scrum of winged visitors on the flowers of Rhus copillanum has an end-of-season vibe: a mad scramble for one last taste of summer before it’s gone for good. Those yellow-green flowers will soon give way to maroon drupes, and the glossy leaves for which the plant is named will turn a flaming red, matching the lighthouse’s exterior.
