My first guess about where the ‘poke’ in pokeweed came from was wrong. It’s simply the English take on the Algonquin or Powhatan word for the plant - poughkone (also puccoon)
‘Phyto’ is Greek for plant. ‘lacca’ is derived from the Latin word for red or crimson dye.
‘americana’ is because the plant is native to America.
This plant is common in our area. It can be very tall - 4 to 10 feet. Perhaps the most notable part of the plant is the berries which can be red to deep purple. While the plant can be highly poisonous to us, many birds eat the berries. The berries can be processed to make a dye thus the ‘lacca’ name.