Photographs: The Gearagh, Co. Cork

Spiked Water-milfoil Myriophyllum spicatum Líonánach Family: Haloragaceae Flowering June-August. Submerged aquatic perennial. Native. Erect flowering spikes with whorls of 4 small dull-reddish flowers, the bracts shorter than the flowers. Leaves are usually in whorls of 4 with 8-15 segments on each side. Widespread throughout Ireland and can be locally abundant in usually base-rich ponds, lakes, canals and rivers. Identified by Paul Green Similar: Rigid Hornwort, Ceratophyllum demersum

Spiked Water-milfoil, Myriophyllum spicatum, Líonánach