Allocasuarina lehmanniana
Allocasuarina lehmanniana, commonly known as dune sheoak, is a species of flowering plant in the family Casuarinaceae and is endemic to near-coastal areas of the south-west of Western Australia. It is dioecious or less commonly a monoecious shrub that has its leaves reduced to scales in whorls of six to eight, the mature fruiting cones long containing winged seeds long.
Description
Allocasuarina lehmanniana is a dioecious, or less commonly a monoecious shrub that typically grows to a height of. Its branchlets are up to long, the leaves reduced to scale-like teeth long, arranged in whorls of six to eight around the branchlets. The sections of branchlet between the leaf whorls are mostly long and wide. Male flowers are arranged in spikes long, in whorls of five to eight per centimetre, the anthers long. Female cones are on a peduncle long, the mature cones long and in diameter containing black samaras long.Taxonomy
Dune sheoak was first formally described in 1845 by Friedrich Anton Wilhelm Miquel who gave it the name Casuarina lehmanniana in Lehmann's Plantae Preissianae from specimens collected by Ludwig Preiss in 1840. It was reclassified in 1982 as Allocasuarina lehmanniana by Lawrie Johnson in the Journal of the Adelaide Botanic Gardens. The specific epithet honours Johann Georg Christian Lehmann.In 1989, Johnson described two subspecies of Allocasuarina lehmanniana in the Flora of Australia and the names are accepted by the Australian Plant Census:Allocasuarina lehmanniana subsp. ecarinata L.A.S.Johnson has branchlets up to long, six or seven teeth, the mature cones long and in diameter.Allocasuarina lehmanniana L.A.S.Johnson subsp. lehmanniana has branchlets up to long, seven or eight teeth, the mature cones long and in diameter.