Banksia laevigata
Banksia laevigata, commonly known as the tennis ball banksia, is a species of shrub that is endemic to Western Australia. It has serrated, broadly linear to narrow wedge-shaped leaves, yellow or yellowish green flowers, depending on subspecies, and linear to elliptic follicles with a slightly wrinkled surface. Description. "Banksia laevigata" is a shrub that typically grows to a height of and has roughly flaky, grey bark but does not form a lignotuber. The leaves are serrated, broadly linear to narrow wedge-shaped, long and wide on a petiole long. Both surface of young leaves are hairy but  become glabrous with age. The flowers are borne in spherical heads wide, usually on the ends of short side branches. The flowers are yellow or yellowish green and have a perianth long and a curved pistil long. Flowering occurs from September to December or from January to February and the follicles are linear to elliptical, long, high and wide. Each head contains up to 100 follicles surrounded by the remains of the flowers. Taxonomy and naming. "Banksia laevigata" was first formally described in 1856 by Carl Meissner in de Candolle's "Prodromus Systematis Naturalis Regni Vegetabilis" from specimens collected by  James Drummond in the Swan River Colony. The specific epithet ("laevigata") is a Latin word meaning "smooth and polished". In 1891, Otto Kuntze, in his "Revisio Generum Plantarum", rejected the generic name "Banksia" L.f., on the grounds that the name "Banksia" had previously been published in 1776 as "Banksia" J.R.Forst & G.Forst, referring to the genus now known as "Pimelea". Kuntze proposed "Sirmuellera" as an alternative, referring to this species as "Sirmuellera laevigata". This application of the principle of priority was largely ignored by Kuntze's contemporaries, and "Banksia" L.f. was formally conserved and "Sirmuellera" rejected in 1940. In 1965, Alex  George described two subspecies in "The Western Australian Naturalist" and the names are accepted by the Australian Plant Census: Distribution and habitat. Subspecies "fuscolutea" is more widespread than the autonym and grows in shrubland between Lake Barker, Hyden and Mount Day near Norseman. Subspecies "laevigata" is found in the Ravensthorpe Range and along the Fitzgerald River where it grows in woodland and shrubland. Conservation status. Subspecies "fuscolutea" is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife, but subsp. "laevigata" is classified as "Priority Four" is classified as "Priority Four" by the Government of Western  Australia Department of Parks and Wildlife, meaning that is rare or near threatened. Use in horticulture. Seeds do not require any treatment, and take 39 to 92 days to germinate.