Calytrix flavescens, commonly known as summer starflower, is a species of flowering plant in the myrtle family Myrtaceae and is endemic to the south-west of Western Australia. It is a shrub with linear to narrowly elliptic leaves, and yellow flowers with about 35 to 60 stamens in several rows.
Calytrix flavescens is a shrub that typically grows to a height of . Its leaves are linear to narrowly elliptic, mostly long and wide on a petiole long. The flowers are borne on a peduncle long with egg-shaped to lance-shaped bracteoles long. The floral tube is glabrous,, fused to the style and usually has 10 ribs. The sepals are fused at the base, with more or less round to broadly egg-shaped lobes long and wide, with an awn up to long. The petals are glabrous, yellow, egg-shaped to lance-shaped long and wide, and there are about 35 to 60 stamens in several rows. Flowering usually occurs between October and January.[1]
Calytrix flavescens was first formally described in 1834 by the botanist Allan Cunningham in 1834 in the journal Botanical Magazine.[2] [3] The specific epithet (flavescens) means 'pale yellow' or 'yellowish', referring to the flowers.[4]
Summer starflower grows on sand-plains, gentle slopes and sometimes in winter-wet areas from the Arrowsmith River district and southwards to the Blackwood River district in the Avon Wheatbelt,Esperance Plains, Geraldton Sandplains, Jarrah Forest, Mallee, Swan Coastal Plain and Warren bioregions of south-western Western Australia, where it grows on sandy soils over granite, laterite or sandstone.