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Ornduffia submersa?
aquatic perennial herb 0.6m
Photographer: Lapre, C.M.H.
Copyright holder: Lapre, C.M.H.
Date Taken: 04 October 1986
Taken at: Walpole Nornalup N.P., WA
Image Source: Australian Plant Image Index (APII) - Photo No.: dig.62226