L., Sp. Pl. 130 (1753).
Derivation: Greek helios, sun; tropos, turn; probably alluding to an early belief that the flowers turned to face the sun.) (Prepared by L. A. Craven
Synonymy: Not Applicable
Common name: Heliotropes.
Annual or perennial herbs, pubescent or glabrous;
Inflorescence a scorpioid cyme, simple or branched, circinnate or more or less straight; calyx 5-lobed, accrescent or not; corolla 5-lobed, salverform or subcylindrical with the lobes scarcely spreading; stamens 5, inserted on the corolla, enclosed, the filaments very short, the anthers 2-celled, free or coherent at the apex and forming a cone over the stigma; ovary 4-celled, the cells 1-ovulate; style terminal.
Mericarps 4 or sometimes fewer, falling at maturity or retained within the sepals.
About 250 species worldwide in tropical and temperate zones, especially in arid and semi-arid regions; in Australia about 40 species.
Key to Species:
Not yet available