Cassidony
Cassidony , noun
[Compare Late Latin cassidonium, French cassidoine. See Chalcedony.]
(a)
(Botany) The French lavender (Lavandula Stochas)
(b)
(Botany) The goldilocks (Chrysocoma Linosyris) and perhaps other plants related to the genus Gnaphalium or cudweed.