Definitions
1.NounAny of several plants, the leaves of which become oriented to the morning sun:
Lactuca serriola, native to Europe, widely introduced to temperate regions.
Silphium laciniatum, native to eastern North America.
Wyethia angustifolia, California compass plant, native to western North America.
2.NounLactuca serriola, native to Europe, widely introduced to temperate regions.
3.NounSilphium laciniatum, native to eastern North America.
4.NounWyethia angustifolia, California compass plant, native to western North America.