Gnephosis cassiniana is a species of flowering plant in the family Asteraceae and is endemic to Western Australia. It is an erect, glabrous, annual herb with sessile, mainly elliptic or egg-shaped leaves, compound heads of yellow flowers, and pink cypselas.
Description Gnephosis cassiniana is an erect, glabrous, annual herb that typically grows to a height of . Its leaves are sessile, mainly elliptic or egg-shaped, about long and wide. The pseudanthia are arranged in compound heads of 6 to 30, long and wide with 9 to 12 bracts long at base of the heads. The petals are yellow and form a tube long and there are five stamens. Flowering occurs from September to October and the fruit is a pink cypsela, long, but there is no pappus.
Taxonomy and naming Gnephosis cassiniana was first formally described in 1990 by Philip Short in the journal Muelleria from specimens collected about south of Binnu in 1983. The specific epithet (cassiniana) commemorates Alexandre Henri Gabriel de Cassini.
Distribution and habitat Gnephosis cassiniana grows in saline depressions and low wet areas in the Avon Wheatbelt, Geraldton Sandplains, Murchison and Yalgoo bioregions of Western Australia.
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