Hypnum chrysogaster is a common and conspicuous moss of rainforest and wet forest. It differs from Hypnum cupressiforme in having a neater branched shoots but is otherwise distinguished by leaf anatomical features.

H. cupressiforme (colloqually known as 'Hyp cup') is a cosmopolitan moss and in Tasmania is represented by at least 3 varieties.

H. nelsonii is an obscure species from Mt Nelson which has not been collected since the type collection.