There are 500 to 600 species with 38 endemic in Australia and 10 introduced.
Annual or perennial plants with rhizomes, tubers or stolons.
The spirally arranged leaves are in a basal rosette +/- on the stems.
The basal leaves are on often hairy petioles up to 45 cm long.
There are various types of leaf blades but many are palmately lobed with 3 to 5 lobes.
They may also be deeply palmately dissected or have 3 leaflets that can have coarse teeth.
Some are simple or pinnately divided into narrow linear segments.
Some have a few hairs on the underside.
Inflorescence stems, up to 50 cm high, may have hairs at the top or base.
There is often just a solitary, terminal flower but sometimes up to 5.
All the flower parts are in a spiral.
There are 5 (3 – 8) sepals that sometimes curve down and may have hairs underneath.
There are 5 to 15 petals commonly yellow, white, cream or greenish.
The petals have nectaries, often near the base or sometimes in the middle.
They may be covered by a small lobe on the petal.
The mostly dark stamens and carpels sit on an enlarged receptacle that may have hairs on it.
There are a few stamens to over 100.
There are from 6 to over 100 (700) carpels each with 1 ovule.
The fruit are a dense cluster of achenes 1 to 2 mm long, usually with a beak.
Their features are important in identifying the species.
There are many cultivars in single or double flowers.
They can be a single colour or bicoloured.
Other colours include reds, pinks, orange, purples to almost black.