Isopogon and Petrophile Study Group

Isopogon divergens


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Welcome to the Isopogon and Petrophile Study Group Website.

The Isopogon and Petrophile Study Group is one of a number of Study Groups within the Australian Native Plants Society (Australia) whose aims are to further knowledge about the cultivation, propagation and conservation of specific Australian plants. Members of the Group are mainly keen amateurs with no formal horticultural or botanical knowledge, although a number of professionals in those fields also participate. As in all study groups, the members' work is mainly carried out in their own homes and gardens and in their own spare time.

The two genera Isopogon and Petrophile are closely related and many are spectacular in flower. They also have a wide variety of leaf shapes, some being flat and wide, others being very narrow and divided into lobes. They are mainly plants of southern Australia with only a few species occurring in sub-tropical areas. The greatest diversity occurs in south-western Australia and it is these species that have caused the most difficulty in cultivation in eastern states of Australia. Reports from Study Group members have assisted in assessing the suitability of various species for cultivation in a range of climatic zones.

Since the inception of the group numerous newsletters have been issued documenting the reports from members into cultivation issues in various climatic zones, propagation methods and natural occurrences of different species. Past issues of the newsletters can be downloaded from this site (see the link below).

If you are interested in the cultivation, propagation, conservation and appreciation of Australia's native flora, especially Isopogon and Petrophile, why not consider joining and helping to promote these plants more widely.


Membership is available to members of an ANPSA-affiliated Regional Society. If you are not a member of a Regional Society, please refer to the ANPSA Membership Page for further information on joining.

To join the Isopogon and Petrophile Study Group, please send a request using the following form. Please note that all fields are mandatory* - you may edit the 'Message' field if necessary:

I am a member of the following Regional Society*:



Regular newsletters are published several times per year. The newsletters provide a forum for Group members to discuss and record activities and experiences in cultivating and propagating Isopogon and Petrophile species, keeping up to date on scientific knowledge of the genus and reporting on field trips to various parts of Australia.

Newsletters published over recent years are available for download.



A small compilation of books, journals and internet resources on Isopogon and Petrophile.


Plant Profiles

Profiles of a number of Isopogon and Petrophile species have been incorporated into the Photo Gallery of the main ANPSA website.

Each profile includes a photograph and information on:

  • Natural distribution
  • Taxonomy
  • Cultivation
  • Propagation

Isopogon Profiles...

Petrophile Profiles...

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