Synonyms: Euploca APNI*
Description: Annual or perennial herbs, glabrous or hairy.
Leaves alternate, sessile or petiolate.
Inflorescence terminal, cymes with or without bracts; flowers sessile or pedicellate. Sepals 5, usually fused only at the very base. Corolla actinomorphic, ± cylindrical with spreading lobes, 5-lobed. Stamens included; anthers subsessile, often mucronate or acuminate with the tips free or cohering and sometimes projecting from the tube. Ovary 4-lobed; style short or long with a conical stigma, rarely exceeding the anthers.
Fruit of 4, sometimes fewer, mericarps which fall at maturity.
Distribution and occurrence: World: c. 300 species, tropical to temperate regions. Australia: c. 78 species (75 species endemic, 3 species naturalised), all mainland States.
Sometimes placed in family Heliotropiaceae.
Text by Peter G. Wilson
| ||Key to the species|| |
|1||Plant glabrous||Heliotropium curassavicum|
|2||Corolla throat glabrous||3|
|Corolla throat hairy|
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|3||Sepals fused for much of their length||Heliotropium supinum|
|Sepals free for much of their length|
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|4||Leaves with margins undulate and revolute; style longer than the stigma||Heliotropium asperrimum|
|Leaves with margins not both undulate and revolute; style shorter than the stigma|
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|5||Leaves linear; mericarps 4; flowers white||6|
|Leaves elliptic or lanceolate; mericarps 2; flowers purple|
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|6||Hairs on lower surface of leaves spreading to ascending||Heliotropium brachygyne|
|Hairs on lower surface of leaves appressed|
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