Definition of rock sage in US English:

rock sage

noun

  • 1Salvia pinguifolia (family Lamiaceae), a north American shrubby sage with purple flowers, found in rocky habitats.

  • 2Any of several plants of the tropical genus Lantana (family Verbenaceae), especially L. involucrata, a small evergreen shrub with white to yellowish tubular flowers with yellow centres, native to the southern states of the United States and parts of Central America.

Origin

Mid 16th century; earliest use found in William Turner (d. 1568), naturalist and religious controversialist.