Round-leaved Pigface (Disphyma crassifolium) is often mistaken for Pigface (Carpobrotus rossii) which is fairly similar.
As its name suggests, its distinguishing feature is its round leaves. These help differentiate it from regular Pigface whose leaves are triangular in cross section.
Both plants have juicy, succulent leaves that can be eaten. Round-leafed Pigface leaves have a saltier tang and don’t bear a delicious fruit. It has become popular of late in trendy restraunts where it goes under the name ‘Beach Bananas’
You can gather it along the coast at any time of the year but it seems to get saltier in Summer when the flowers are blooming.