Deadly nightshade

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Deadly nightshade
Scientific name: Atropa belladonna [252]
Description: A small shrub with faintly scented, bell-shaped flowers that are purple tinged with green in colour. Berries are shiny and black when ripe.[source?]
Location: Moist, shady places. Often grows in places where the soils are rich in limestone.[source?]
Usage: To quickly kill a cat who cannot be saved.[source?]
Effect: Poisonous.[253]
Mentioned in Forest of Secrets when Fireheart and Cinderpaw are with Cloudkit. Cloudkit almost eats some deathberries, but is quickly stopped by Cinderpaw. When Cloudkit runs off and calls them to see what he found, she jokes in response that perhaps Cloudkit found deadly nightshade.[253]
Water hemlock

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Water hemlock
Scientific name: Cicuta [254]
Description: Green or white flowers with petals in umbrella-shaped clusters.[source?]
Location: Wet, marshy areas.[source?]
Usage: Unknown
Effect: Causes writhing, pain, and foaming at the mouth.[255]
Water hemlock is the most poisonous plant in the Clan territories after deathberries.[174] Water hemlock is used by Mousewhisker and Cherrypaw who mistake it for parsley, and the two collapse and start convulsing violently. Yarrow is used to help them afterward. [256]