(1):

(a.) The euphorbiaceous plant Chrozophora tinctoria.

(2):

(a.) Litmus.

(3):

(a.) A purple dye obtained from the plant turnsole. See def. 1 (d).

(4):

(a.) A kind of spurge (Euphorbia Helioscopia).

(5):

(a.) The sunflower.

(6):

(a.) A plant of the genus Heliotropium; heliotrope; - so named because its flowers are supposed to turn toward the sun.