| These three
genera of native shrubby daisies are superficially similar. They all
have small to very small flower heads with only tube flowers. The
heads are clustered together in compound inflorescences that often
contain many heads.
The genera can be distinguished by inflorescence characters.
In Odixia (formerly known as Ixodia; two species in Tasmania) the flowers
have no pappus.
Cassinia (two species in Tasmania) has chaffy scales
between the individual flowers as well as a pappus. nb. Cassinia spectabilis is
now known as Apalochlamys spectabilis.
The 19 species of Ozothamnus (formerly included in Helichrysum)
lack these scales, but have a pappus. One species of Ozothamnus,
O. selaginoides is presumably extinct and is not included in
the key.
To minimise the need to dissect individual flower heads, a
combined key to species is given
for these genera.
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