Lovely plant my friend and Dietes bicolor produces fan shaped clumps of iris like narrow sword-shaped basal evergreen leaves. Attractive Iris like flowers appear on the branched stalks from spring to autumn and intermittently throughout winter.
Each flower has three light yellow petals with dark brown blotches 5cm wide.

Seeds germinate readily, however they do have a hard outer coating which is impervious to water and generally germination will normally not occur unless the seed is scarified by abrading or pre-treated with boiling water first.

Cultivation
Plants prefer dappled shade to full sun where they will flower in profusion, though they will grow in shaded areas (with an accompanying loss of flower production). Under favourable conditions, the clumps multiply rapidly. Dietes grandiflora are drought and frost hardy, making them popular for en masse plantings.

Notes
Wild iris (Dietes iridioides) is regarded as a potential environmental weed or a "sleeper weed" in many parts of southern Australia. It has been reported from urban bushland in the Hornsby Plateau region to the north of Sydney Harbour and also from remnant patches of native woodlands in the Maranoa Gardens in suburban Melbourne.

source