This Mediterranean weed is now widespread across North America though often overlooked. Browne (1974) first reported it from Ky. Variation deserves further study (2n = 20, 40). The coll. from GALL (M. Medley #15061-86 at KNK & WKY) is referable to ssp. bipinnatum Tour., which has not been reported widely in North America, if at all. There may be considerable variation in life-cycle (annual versus biennial) and phenology, with a wide range of reported flowering dates. In FAYE, flowering and fruiting has been observed during Dec to Jan in 2017/18 and 2020/21..