Mandrake, aka Mandragora

Mandrake, also known as Mandragora, has long been associated with magic. It is a required ingredient for several diamorph rituals, and is also a poison that in large quantities causes blurred vision, pupil dilation, dryness of the mouth, difficulty in urinating, dizziness, headache, vomiting, and a rapid heart rate. Hyperactivity and hallucinations occurred in the majority of patients. 
The modern strain of mandrake appears to have mutated from historically documented trains due to toxins in the atmosphere. The flowers are now bioluminescent in the moonlight and it releases a strong scent of red apple. This attracts a great many insects to pollinate it. This strain is also very difficult to cultivate artificially, although it's not entirely understood why.
Mandrake grows in the badlands, but most people pay it no mind, apart from steering goats and children away from it.

Uses:

In small doses, mandrake root induces a feeling of flying and can be used as a recreational hallucinogen. Most Twilight Rangers and border guards will not recognise this as a drug, meaning it can easily be smuggled into the city.
Mandrake is also an important ingredient in certain diamorph and magical rituals, for which no other substitute has been found.

Myths and History

Although the root can look like a homunculous, contrary to historical myth, mandrake root does not scream when it is dug up.
Historically, mandrake was used by the Ancient Greeks as incense and a hallucinogen. Witches in the middle ages used it to commune with their covens.

Rumours & hooks

Rumours state that there are clumps of Mandrake root in the Twilight Badlands . Jackson R. Verducci, Twilight Ranger, who claims to know the Badlands like the back of his scarred hand, might know more.

Pierre Xang Bjornson is looking for exotic plants native to the badlands which he can use to spice up his latest dishes. He might be persuaded to purchase or trade for some mandrake, if you have it to hand.