DCHP-1 Online
goose-grass 
n. any of several herbs supposedly eaten by geese, especially silverweed, Polygonum aviculare, and horsetail, Equisetum sp.
- 1810 (1897) The snow prevented them [horses] from filling their bellies with that small goosegrass, which is the only thing for them in these swamps.
- 1888 (1890) I woke about midnight, and heard something splashing in the creek, but thinking it was only some of the ponies drinking, or crossing the water to another bank of goose-grass we had come through from the other side, I slept until morning.
- 1957 It had taken its way through goose grass and juniper and scrub pine and willow. . . .
- 1810 (1897) The snow prevented them [horses] from filling their bellies with that small goosegrass, which is the only thing for them in these swamps.