The first Guinea Flowers of the season are beginning to open. Looking at the leaves, as well as the flowers, as far as I can tell these are the Erect Guinea Flower (Hibbertia riparia). However, according to my field guides, the Erect Guinea Flower begins flowering in September. So I will check a few other sources before claiming that it actually is the Erect Guinea Flower. Other possibilities I’ve considered include the Spreading Guinea Flower (Hibbertia procumbens) and the Bundled Guinea Flower (Hibbertia fasciculata). All three species are supposed to flower in Spring, so whatever it is, I do think it is flowering out of season.
The plants I have found are all under 45 cm tall, with most plants being less than 30 cm. So far, each plant only has one or two flowers open, but all of them have many buds at various stages of growth. In a week or two, they will be covered in flowers. From my observation, the flower buds are all at the end of the branched stems.
The beautiful clear yellow of the Guinea Flower is very welcome in Winter, when there are not many colourful blooms.