The pond shore by Brockton High School still has last year's cattails.
The new leaves will begin to emerge soon.
Look for alder (Alnus) male catkins swaying in the breeze on pond shores right now. Alder is an early-flowering native shrub that likes having its feet in wet ground. (These alders grow on the shore of the pond in front of Brockton High School.) The female flower clusters are the tiny, red, upright, spiky things visible in the close-ups. After it matures, the female flower clusters turn into things that look very much like miniature pine cones--last years' are visible in the last photo, above this year's female flower clusters.