Persoonia muelleri is a widespread and common shrub that grows
in wet forest (often relatively open places in such forest) in the
west and north-east. It extends into subalpine and rarely alpine areas
in the west. It is sometime confused with P. gunnii, but has
longer, straighter leaves and larger, yellow flowers.
There are three subspecies -
ssp. muelleri is hairless and grows in the north-eastern
half of the state,
ssp. angustifolia has narrow, hairy leaves and grows in
the west on very nutrient poor substrates,
ssp. densifolia has hairy, relatively broad leaves and grows
along the south coast and offshore islands.