Purslane, a troublesome weed. The phrase meanern pusley, is common in some parts of the U.S.
1854. I flourish, professionally speaking, like pussley in a deserted pig-pasture, because of the capaciousness of my pulpit and pureness of the moral atmosphere surrounding it!Dow, Jun., Patent Sermons, iv. 14.
1861. When boiled, [it] is a most delicious and wholesome vegetable, the leaves being like spinach, and the branches in taste resembling sea-kale. In prairie settlements Pussley is always a standing dish.N. A. Woods, Prince of Wales in Canada and the U.S., p. 309. (N.E.D.)
1878. Its meaner n pusley to keep you here, and be a livin on your intrest money when you ought to be arnin more, and I wont do it, so there now!Rose T. Cooke, Happy Dodd, chap. xxx.