Synonyms: Gaura APNI*
Description: Annual or perennial herbs or subshrubs, sometimes stem reduced.
Leaves basal or alternate, often attenuate at the base, and reducing in size up stem, margins often undulate and ± entire to pinnatifid.
Flowers solitary in the upper bract-like leaf axils or in spike-like racemes; often conspicuous, usually opening in the evening and fading the next morning; actinomorphic, 4-merous. Hypanthium usually long and slender, not persistent. Sepals not persistent. Petals usually yellow, pink or white, often becoming reddish with age.
Fruit a capsule; seeds numerous.
Distribution and occurrence: World: c. 120 species, America. Australia: 13 species (naturalized), all States.
**O. triloba is doubtfully recorded as naturalized in N.S.W.; however, the record is not substantiated. One record only from near Inverell, in 1941.
Text by J. M. Dalby
Taxon concept:
| | Key to the species | |
| 1 | Plant softly hairy; flowers actinomorphic; petals less than 5 mm long | Gaura parviflora |
| Plant coarsely hairy; flowers zygomorphic; petals more than 5 mm long | Gaura lindheimeri |
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