j-k's Identifications

Australian Boxthorn, and the only Lycium species native to Oz. Lycium australe [see below*] is prevalent on the uncleared coastal land at Port Bonython, and occurs in similar parts of upper Spencer Gulf, also parts of mid to lower Spencer Gulf(e.g. Lucky Bay is a good spot to see this plant competing unsuccessfully with L. ferocissimum). Mainly (personal anecdote only) on the Eyre Peninsula side but I've seen reasonable populations in a few spots on the Yorke P side e.g. at Moonta Bay on low coastal cliffs.
*[**iNat does not recognize Lycium australe so I don't know if the taxonomy's changed or etc but I'll await progress for a day or so before I flag that anomaly]