Hypnodendron comosum is endemic to the Australian states of New South wales, Victoria, and Tasmania and to New Zealand, Stuart Island, and the Campbell Islands.

Since it is located in New Zealand as well as Australia, this indicates that the species predates Gondwanaland, suggesting that this species may be included as one of the earliest species to diverge from water to land and may give vital insight toward how vascular plants evolved.

Hypnodendron comosum var.
sieberi is more commonly located on mainland Australia and the northern South Island of New Zealand, whereas H. c. var.
comosum is more commonly located in Tasmania, the southern South Island of New Zealand, and the islands located in the southern ocean.
Hypnodendron comosum is endemic to the Australian states of New South wales, Victoria, and Tasmania and to New Zealand, Stuart Island, and the Campbell Islands. 
Since it is located in New Zealand as well as Australia, this indicates that the species predates Gondwanaland, suggesting that this species may be included as one of the earliest species to diverge from water to land and may give vital insight toward how vascular plants evolved. 
Hypnodendron comosum var. sieberi is more commonly located on mainland Australia and the northern South Island of New Zealand, whereas H. c. var. comosum is more commonly located in Tasmania, the southern South Island of New Zealand, and the islands located in the southern ocean.
Hypnodendron comosum