Author: Jan Scholten
Source: Sense provings.
English: Pickerelweed; Pickerel weed.
Boany: aquatic, in wetlands, pond and lake margins, emergent, in flooded conditions, fluctuating water levels
soil fertility, tending to grow in the more fertile bays of large lakes, for example. Like many aquatic plants, it is negatively affected by salinity and grazing. It is also negatively affected by competition from other wetland plants. Like many wetland plants, it can survive unfavorable conditions as buried seeds in the soil.
The plant flowers in late summer. The purple flowers have yellow markings which may assist in attracting bees for pollination. Two species known to pollinate the flowers are Melissodes apicata and Dufourea (Halictoides) novaeangliae. Once the plant begins to produce seeds, the stem supporting the infloresence bends to submerse the fruits and seeds. Seeds are dormant at the time of dispersal and will not germinate without stratification for 6–8 weeks.
The flowers of the species are tristylous, meaning the styles of individual plants occur in three different morphs, with most populations containing all three. Leaf shape, which varies considerably across populations, within populations, and even within individuals, has been the source for many taxonomic synonyms. Like many wetland and aquatic plants, the species can reproduce asexually by means of branching rhizomes, and hence can form large clonal stands.