Spiked Water-milfoil - Myriophyllum spicatum
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Species Description
Widespread and locally common throughout the lowland parts of the UK. Habitat includes: Base-rich ponds, lakes, rivers, ditches and rhynes etc.
Stace 4:
Myriophyllum spicatum L. - Spiked Water-milfoil.
Stems to 2.5m; leaves (3)4(-5) in a whorl, usually with 13-38 segments; spikes erect from first; male, female and bisexual flowers present, 4 in a whorl; 2n=42. Native; mostly base-rich ponds, lakes, slow rivers and ditches, mostly lowland; locally common over British Isles.
Key:
- Leaves (3)4(-5) in a whorl; uppermost bracts simple, entire or minutely serrate
- All flowers in whorls, reddish; leaves usually with 13-38 segments; usually in base-rich water