Myriophyllum crispatum is a species of water milfoil native to Australia.
Myriophyllum crispatum has tall stems. The leaves grow in whorls of 5âÂÂ8. Submerged leaves are thread-like with 12âÂÂ20 leaflets. Intermediate leaves are thicker with 6âÂÂ8 short pinnae, transitioning into smooth linear terete forms.
Myriophyllum crispatum is monoecious. The male flower has 4 cream to dark brown or purple petals. The female flower lacks petals.
Myriophyllum crispatum occurs in Western Australia, south-eastern Australia, northern Tasmania, and south-eastern Queensland. It is most commonly found in shallow, stagnant water.