High Quality Content by WIKIPEDIA articles! The flora of Western Australia comprises 9,437 published native vascular plant species of 1,543 genera within 226 families; there are also 1,171 naturalised alien or invasive plant species more commonly known as weeds. There are an estimated 150,000 cryptogam species or nonvascular plants which include lichens, and fungi although only 1,786 species have been published, with 948 algae and 672 lichen the majority.