Annual or perennial herbs, sometimes subshrubby. leaves alternate, rarely subopposite. Cymes spike-like, usually scorpioid, terminal or pseudoaxillary, simple or branched; rarely flowers solitary, supra-axillary. Flowers bisexual, 5-merous. Corolla salver-shaped or funnel-shaped, white, yellow or blue. Stamens included. Ovary 4-celled, entire or subentire. Style terminal. Fruit dry, usually splitting at maturity into four 1-seeded nutlets, free or cohering in pairs or remaining entire and 1-seeded by abortion. Derivation of name: turning with the sun, heliotropic Worldwide: c. 250 species, tropical and temperate areas Botswana: 8 taxa. |
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| Species | FZ divisions | Content |
| ciliatum Kaplan | N,SW,SE | Description, Image |
| curassavicum L. | N | |
| giessii Friedr.-Holzh. | N,SW,SE | |
| indicum L. | N | Description, Image |
| lineare (A.DC.) Gürke | SW,SE | |
| steudneri Vatke | N,SW,SE | Description, Image |
| supinum L. | N,SE | Description, Image |
| zeylanicum (Burm. f.) Lam. | N | Description, Image |