"It's water hemlock..." She cautious, "Quite poisonous. Please try not to touch the bare leaves."
She continues to explain, "It's native to the area, and grows wild along creeks... this particular one was right in a creekbed by one of the common trails where I've seen children visit to swim, though. I didn't want to uproot it... it's still a living plant, and hasn't done anything wrong... but I figure if anyone is likely to want a poisonous garden, it might be a sluagh."