Helianthus annuusCommon name: Sunflower
Distribution: Occurs from Denham to Bunbury.
Description: An erect plant to 3 metres tall. The flower heads can be large with a black centre surrounded by yellow petals from February to May.
Notes: This plant is a native of North America.
References: Western Weeds, A Guide to the Weeds of Western Australia. BMJ Hussey, GJ Keighery, J Dodd, SG Lloyd, RD Cousens. 1997.
Flora of the Perth Region. NG Marchant, JR Wheeler, BL Rye, EM Bennett, NS Lander, TD Macfarlane. 1987.