sensu Fl. Victoria 4:900 (1999)
Threat status:Victoria: endangered (e)
In all respects this taxon resembles O. tubuliflora except the ray florets have distinct white ligules 1.5–2.5 mm long. Flowers Feb.–Mar.
Also WA, SA. Known in Victoria by only one collection with precise locality, from heathland near Mt Byron in the Black Range (collected 1948). Three other pre-1900 specimens at MEL are labelled 'Wimmera' or 'mallee scrub, Shire of Dimboola'.
Victorian specimens currently assigned to this taxon are smaller-leaved than specimens from Western Australia or South Australia. Further research is required to verify whether or not they are conspecific, or if they may be merely aberrant forms of O. tubuliflora.