Pontederia cordata var. lancifolia(pickerelweed, "Hosonagabamizuaoi")
Japanese name: ホソナガバミズアオイ（細長葉水葵） Scientific name:Pontederia cordata var. lancifolia
[Overview]
A perennial growing in wet marshy places, reaching 60–120 cm in height.
The leaves are simple and basal, lanceolate, about 25 cm long, with a wedge-shaped base and entire margins.
They have long leaf stalks.
A spike 7–15 cm long, borne at the tip of a flower stalk about 60 cm tall, bears many bluish purple flowers with 6 petals.
One of the upper petals has a yellow spot.
The fruit is a capsule.
[Cultivation]
Propagate by division or from seed.
It prefers sunny, wet marshy places.
Even if the water freezes, it will not die as long as the rhizome in the soil does not freeze.
There are no particular pests or diseases.
