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The journal of the Western Australian Herbarium

Hibbertia paranthera (Dilleniaceae), a remarkable new species from the Prince Regent River in Western Australia

A distinctive and remarkable new species in Hibbertia Andrew subgen. Pachynema (R.Br. ex DC.) J.W.Horn is described and illustrated. Hibbertia paranthera K.R.Thiele sp. nov. differs from all other species in subgen. Pachynema (and in the whole of Hibbertia) in having an androecium reduced to two large stamens, and a corolla of three petals. The new species is currently known from two populations c. 30 km apart in sandstone habitats in a remote area in Prince Regent National Park, between the Prince Regent River and Prince Frederick Harbour.