You gather things when you bring several of them to the same place. A gathering of friends is a group of friends getting together. The person in the picture has gathered a handful of berries.
Scientific name: gazania rigens
Gazanias are a very hardy, low-growing plant originally from South Africa. It grows in very dry climates and in poor soil, and will tolerate frost, drought and coastal conditions. They are often mass planted as a ground cover in dry areas. They have been selectively bred to have flowers in a variety of colours, from white and yellow through to pink, although orange and yellow are the most common.
They are easy to grow from seed, and will self-sow and spread rapidly, so are regarded as a weed in some parts of Australia. They can also be grown from cuttings.