Heliotropium, heliotropij, Herba. Plin. Quidam putant eam esse, quæ etiam Calendula dicitur, vulgo. The rudde or Marigold. It turneth with the sunne, bothe at the rising and going downe, whiche propertie is not in the Marigolde, and therfore it is to be doubted whether it be % Marigold or no.
Lewis and Short: Latin dictionary
hēlĭŏtrŏpĭum, ii, n., = h(liotro/pion. I.The plant turnsole, heliotrope, Varr. R. R. 1, 46; Plin. 2, 41, 41, 109; 22, 21, 29, 57. —II.A precious stone with green and brown streaks, striped jasper, Plin. 37, 10, 60, 165.—Called also: hēlĭŏtrŏpĭos (gemma), Mart. Cap. 1, 75: heliotropius lapis, Prisc. Perieg. 254.