<![CDATA[Image RSS Feed for Image Collection 367 - Eurasian watermilfoil (Myriophyllum spicatum) - Selected Images only]]> http://www.ipmimages.org/collections/viewcollection.cfm?id=367 Appearance

Myriophyllum spicatum is a submersed aquatic plant that invades lakes, ponds, and other aquatic environments throughout the United States. The plants are rooted and the stems grow up to the water surface, usually reaching 3-10 ft. (0.9-3 m) in length and can be as much as 30 ft. (9.1 m) long.

Foliage

Leaves are bright green, finely dissected, and whorled. The delicate leaflets give this plant a feathery appearance.

Flowers

Myriophyllum spicatum has both male and female flowers on the same inflorescence. The female flowers are basal while the male flowers are located distally. The female flowers have a 4-lobed pistil and lack sepals and petals. The male flowers have 4 pink petals and 8 stamens.

Fruit

The very small globular fruit of Myriophyllum spicatum are indehiscent, and contain 4 seeds.

Ecological Threat

Myriophyllum spicatum requires stagnant to slowly moving water and can tolerate brackish conditions. It forms dense mats of leaves restricting light availability, leading to a decline in the diversity and abundance of native macrophytes. In addition, Myriophyllum spicatum displaces the native species of watermilfoil and reduces habitats for fish spawning and feeding. It is native to Europe, Asia, and northern Africa.

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Fri, 29 Mar 2024 12:44:14 -0400 Fri, 29 Mar 2024 12:44:14 -0400 http://Images.bugwood.org/ <![CDATA[Eurasian watermilfoil Myriophyllum spicatum]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5273022 Eurasian watermilfoil Myriophyllum spicatum]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5273022 <![CDATA[Eurasian watermilfoil Myriophyllum spicatum]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1624031 Eurasian watermilfoil Myriophyllum spicatum]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1624031 <![CDATA[Eurasian watermilfoil Myriophyllum spicatum]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5273023 Eurasian watermilfoil Myriophyllum spicatum]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5273023 <![CDATA[Eurasian watermilfoil Myriophyllum spicatum]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=0002001 Eurasian watermilfoil Myriophyllum spicatum]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=0002001 <![CDATA[Eurasian watermilfoil Myriophyllum spicatum]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5308029 Eurasian watermilfoil Myriophyllum spicatum]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5308029 <![CDATA[Eurasian watermilfoil Myriophyllum spicatum]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5308027 Eurasian watermilfoil Myriophyllum spicatum]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5308027 <![CDATA[Eurasian watermilfoil Myriophyllum spicatum]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5400612 Eurasian watermilfoil Myriophyllum spicatum]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5400612 <![CDATA[Eurasian watermilfoil Myriophyllum spicatum]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5400618 Eurasian watermilfoil Myriophyllum spicatum]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5400618 <![CDATA[Eurasian watermilfoil Myriophyllum spicatum]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5447202 Eurasian watermilfoil Myriophyllum spicatum]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5447202 <![CDATA[Eurasian watermilfoil Myriophyllum spicatum]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5400619 Eurasian watermilfoil Myriophyllum spicatum]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5400619