It has been too long since I’ve checked out the plants in the spectacular dunes at Goose Spit. A number of specialized plants grow in these dunes—yellow sand verbena (Abronia latifolia) and black knotweed (Polygonum paronychia) are prolific. With a little effort, other interesting plants can be found as well. A large patch of Black Knotweed (Polygonum paronychia) just above …