17 herbs found:
| Herb | Sources | Effect | Description |
| achorion mould | Ohulan-Cutash | A quite virulent poison, it can cause great damage and even death instantly upon ingestion of the oils from the herb, which must first be extracted. | Achorion Mould is a purple-grey mould or fungus. |
| angel's trumpet | Hashishim, Ninja | It has a mild hallucinogenic effect, which can be much more pronounced when it is mixed with another substance with this same property. | Angel's Trumpet is a tall bush, with broad leaves and large, drooping trumpet shaped flowers that are a creamy white colour. |
| belladonna | Ankh-Morpork, Gate Ave, BP, Hashishim, McSweeney Estate, Sto Lat | Belladonna has many interesting effects on the body, most to do with the eyes. It can also combine well with other herbs, to create differing effects. | Belladonna, or Deadly Nightshade, is a short herb with dark green leaves and dull purple flowers. |
| borage | Scrogden | Combines well with a few different plants to create various effects. Can have a curiously forgetful effect, but also, when combined with certain herbs, a effervescent reaction. | Large oval green leaves with bright blue star shaped flowers. The whole plant is rough with white, stiff prickly hairs. |
| bryony | Ankh-Morpork, Gate Ave, BP, McSweeney Estate | Bryony has the strange effect of dyeing the skin of anyone who ingests a mixture of its oils bright red. | A showy herb, with dark violet heart shaped leaves, and small, loosely bunched greenish-white flowers. |
| cereus | Gate Ave, BP, Mano Rossa, McSweeney Estate | Cereus causes mild confusion, and is best mixed with other ingrediants, such as Skullcap to enhance its effect. | Cereus is a night-blooming plant with silvery-white flowers that smell strongly of vanilla. |
| clematis | Mano Rossa | This herb when ingested, irritates the eyes and throat giving rise to a flow of tears that eventually become so severe that the person drowns in their own bodily fluids. | Clematis is a tall herb, with striped red and green leaves and large white flowers. |
| delphinium | Sto Lat | unknown | Delphinium is also known as blue butterfly. Clusters of blue flowers cover the light green foilage, their petals are shaped like butterfly wings. |
| foxglove | Ankh-Morpork, Sto Lat | Foxglove has a rather adverse effect on the heart, and ingestion of the oils can cause it to beat so quickly that it literally explodes out of the body. | A very tall herb with long spikes of drooping scarlet bell-shaped flowers. |
| gelsemium | unknown | Poisonous doses of Gelsemium produce a sensation of muscular weakness, which may be followed by paralysis. The spine is especially affected. | One of the most beautiful herbs, with shining dark leaves and large, fragrant yellow flowers. |
| hellebore | Mano Rossa | Hellebore is a violent narcotic, and thus can result in stupor, coma, convulsions or death. | A low-growing herb with dark, shining, smooth leaves and pure white blossoms that rise directly from the roots. |
| hemlock | Ankh-Morpork, Gate Ave, BP, Hashishim, Mano Rossa, McSweeney Estate, Ninja | Causes a general feeling of illness, which can last for some time after ingestion. Most potent when combined with snake venom, but also mixes well with other herbs. | A tall, graceful herb with a pale yellow stem and small white flowers. It has a strange mousy odour. |
| laburnum | unknown | Poisoning by Laburum may result in such diverse effects as intense drowsiness, vomiting, coma, convulsions and frothing at the mouth. | A squat herb with a dark, almost black stem, pale green leaves and rich yellow flowers. |
| monkshood | Ankh-Morpork, Gate Ave, BP, McSweeney Estate | The effects of Monkshood poisoning includes tingling and numbness of tongue and mouth and a sensation of ants crawling over the body. Copious vomiting is another aspect, sometimes it is so violent that the actual guts are vomited out. | A small herb with dark purple cowl-like flowers and similarly dark leaves. |
| skullcap | Gate Ave, BP, Mano Rossa, McSweeney Estate | Once treated, ingestion can cause acute confusion and disorientation. This effect can be increased by combining it with Cereus and various other ingredients. | A low herb, with lush, dark green leaves and tiny blue flowers. The flowers have a strange helmet like shape to them. |
| tyler weed | Ankh-Morpork, Gate Ave, BP, McSweeney Estate | Tyler Weed has a very strong self-loathing effect and can cause complete rage and anger. Without other ingredients, it is not very effective however. | A colourful herb with bright yellow flowers with blue spots. The leaves are a strange, fuzzy red. |
| wormwood | Ankh-Morpork, Mano Rossa | Causes acute hallucinations, especially visions of small birds wearing green fairy outfits. Bizarre. | A tall firm herb with large, whitish leaves and nearly globular green-yellow flowers. |