A Yellow Dayflower, native to sub-saharan Africa. The leaves are edible and the plant has several applications in folk medicine. Photo from the Liparamba area of Tanzania.
Tall Kangaroo Paw (Anigozanthos flavidus) in cultivation at the Australian National Botanic Gardens, Canberra, ACT, Australia. Photographed on 1 January 1972.Digitised from a slide. The original slide, which is of higher quality, is held.
Tribonanthes purpurea This is a tiny flannel flower which grows in moss on granite rocks. It is listed as a Threatened plant and grows in only a few locations. The flower is about 1cm tall, the leaves growing to 3-4cm. It is a very hard plant to locate and find even when you know where it is. More photos in first comment