meadow parsnip
noun
1Any of several North American plants constituting the genus Thaspium (family Apiaceae (Umbelliferae)), with trifoliate leaves and chiefly yellow flowers.
2 US (more fully golden meadow parsnip), golden alexanders, Zizia aurea.
Origin
Mid 16th century; earliest use found in William Turner (d. 1568), naturalist and religious controversialist.