Alyssum alyssoides is a species of flowering plant in the mustard family known by several common names, including pale madwort and yellow alyssum. It is native to Eurasia, but it can be found throughout much of the temperate world as an introduced species and sometimes a common weed.
This is a hairy annual or biennial herb producing stems which grow upright or lie along the ground to a maximum length of 30 to 40 centimeters. It produces yellow flowers fading to white with four small petals about 1.5 mm long. The fruit is a round, hairy capsule up to half a centimeter long. The hairs are branched, often stellate (star shaped).
- "The Plant List: A Working List of All Plant Species". Retrieved 8 July 2014.
- Stace, C. A. (2010). New Flora of the British Isles (Third ed.). Cambridge, U.K.: Cambridge University Press. p. 406. ISBN 9780521707725.
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