Advice from @jackiemiles: According to iNaturalist South Africa, even in its area of origin, Dimorphotheca plants are often hybrids. And unlike Gazania, where the hybrids have been given a name (Gazania x splendens) there is no accepted name for Dimorphotheca hybrids, so best just left at genus, and not Dimorphotheca ecklonis or D.fruiticosa.
https://inaturalist.ala.org.au/observations/246123056
Hi everyone, Jenny's account name has been updated to 'Vale Jenny Conolly' along with an updated profile:
https://inaturalist.ala.org.au/people/1128326
Some good advice here on the differences:
https://www.inaturalist.org/observations/246821839#activity_identification_4ae298fd-e8e1-445b-a1d8-b751ff97e925
This observation of Philotheca trachyphylla has the differences with P.myoporoides explained:
https://inaturalist.ala.org.au/observations/246883382
