Botanical Name: Alisma plantago-aquatica
Height: to 1 m.
Flowering Time: Summer
Conditions. Full sun. Wet, mucky soil. Shallow water to about 15 cm.
Remarks. The flowers are small and individualy fleeting but the large airy inflorescence is decorative. A. plantago-aquatica recently has been split into two species, A. trivale and A. subcordatum, The distinguishing field mark is the length of the sepals relative to the length of the petals. I neglected to check on my plants when they were flowering. Next year.