Robert Lawrence from the Native Orchid Society SA did several site searches for the bell-flowered hyacinth orchid: an orchid of significance in the site of which we have reported on in previous newsletters. He found several more occurrences of the orchid in the park and mapped their locations for future reference. This may also become a factor in prioritising future work in the park.
In December 2021, the Friends of Black Hill and Morialta were awarded a Friends of Parks ‘On-park’ small grant at the value of $5,000. These funds were used to employ two contractors in spring 2022 to work in high quality native vegetation of the park using sensitive bush care techniques. The contractor Environmental Weed Control and Revegetation (EWC&R) performed woody weed control by systematically traversing the targeted area and removed Boneseed, Erica, Blackberry, English and Montpellier broom.
Restore Environmental Services performed follow up Chincherinchee control that was chemically treated in July 2022 with Green Adelaide Landscape Board funds. Work started in the priority one area where small, isolated patches of 10-20 flowering plants were found, dug up and bagged. Work continued along the Rockdale Hill walking trail where denser infestations of Chincherinchee were found. Chincherinchee was dug up and bagged within a 2 metre buffer either side of the trail to deter bushwalkers from picking the flowers. Opportunistic control of Boneseed, Olives and Watsonia was also undertaken as they were encountered.
The result of this work has increased the quality of native vegetation in Horsnell Gully Conservation Park. This will continue to contribute to the protection and conservation of a number of the regions’ significant flora and fauna species, in particular the chestnut-rumped heathwren, yellow-footed antechinus and yellow-tailed black cockatoo.