Myriophyllum consists of perennial plants that can grow either fully submerged or at the water's edge. They feature intricately divided underwater leaves and produce small flowers, which may appear singly or in clusters from the leaf axils.

Myriophyllum

Myriophyllum alterniflorum

Myriophyllum aquaticum is classified as an invasive, non-native species under Schedule 9 of the UK Wildlife & Countryside Act, making its sale illegal. For further information, refer to the cultivation notes. This aquatic perennial features branched stems that grow submerged, adorned with whorls of finely divided leaves that create a floating mat. Some stems can reach an upright height of approximately 15 cm.

Myriophyllum aquaticum

Myriophyllum aquaticum 'Noel'PBR

Myriophyllum aquaticum 'Red Stem' is classified as an invasive, non-native species under Schedule 9 of the UK Wildlife & Countryside Act, prohibiting its sale. Refer to the cultivation notes for additional information.

Myriophyllum aquaticum 'Red Stem'

Myriophyllum crispatum is a deciduous aquatic species suited for shallow water environments. It features feathery, whorled foliage that displays a vibrant green hue, rising on sturdy stems above the water's surface. From June to July, it produces small red flowers. While it may resemble Myriophyllum aquaticum, which is prohibited under Schedule 9 of the UK Wildlife and Countryside Act due to its invasive nature, Myriophyllum crispatum is considerably less invasive and contributes to the oxygenation of pond ecosystems.

Myriophyllum crispatum

Myriophyllum elatinoides

Myriophyllum heterophyllum is classified as an invasive, non-native species in Schedule 9 of the UK Wildlife & Countryside Act, making its sale illegal. Refer to the cultivation notes for additional information.

Myriophyllum heterophyllum

Myriophyllum hippuroides

Myriophyllum propinquum

Myriophyllum spicatum is a perennial aquatic plant that grows submerged underwater. It features branched stems that hold whorls of finely divided leaves, resembling hair-like segments. In summer, small, inconspicuous red flowers emerge on spikes that rise above the water's surface.

Myriophyllum spicatum

Myriophyllum verticillatum is a perennial aquatic plant that grows underwater, featuring branched stems adorned with whorls of finely divided, hair-like leaves. In the summer, it produces small, inconspicuous red flowers that emerge in spikes above the water. Its leaves are somewhat longer compared to those of M. spicatum.