The Collaborative International Dictionary
Cassidony
Cassidony \Cas"si*do*ny\, n. [Cf. LL. cassidonium, F. cassidoine. See Chalcedony.] (Bot.)
The French lavender ( Lavandula St[oe]chas).
The goldilocks (Chrysocoma Linosyris) and perhaps other plants related to the genus Gnaphalium or cudweed.
Wiktionary
cassidony
n. 1 (vern: French lavender) ((taxlink Lavandula stoechas species noshow=1)). 2 goldilocks (taxlink Aster linosyris species noshow=1) and perhaps other plants related to the genus ''Gnaphalium'' or cudweed.