Thoreau writes in his journal:
P.M.—To Saw Mill Brook via Trillium Woods . . .
The Ambrina (Chenopodium, Bigelow) Botrys, Jerusalem-oak, a worm-seed, by R.W.E.’s heater piece. The whole plant is densely branched—branches,spike-like—and appears full of seed. Has a pleasant, more distinct wormwood-like odor . . .
