TL;DR: This new species of Labichea rossii, described from a ridge of Banded Iron Formation in the ranges near Mt Holland, Western Australia, has very dissimilar petals more reminiscent of flowers from subfamily Faboideae.
Abstract: Gibson, N. Labichea rossii (Fabaceae: Caesalpinioideae), a new species from the Yilgarn Ranges, Western Australia. Nuytsia 21(3): 91–95 (2011). A new rare species of Labichea Gaudich. ex DC. is described from a ridge of Banded Iron Formation in the ranges near Mt Holland. Unlike most species in the genus, this new species, L. rossii N.Gibson, has very dissimilar petals more reminiscent of flowers from subfamily Faboideae.