9.08.2012

Pontederia cordata


Pickerel weed - Pontederiaceae - aquatic - Eastern Canada to Argentina - aphids - wet or submerged - aphids - aggressive = needs to be contained - wetlands ponds lake margins - tolerant of low soil oxygen - July to September late summer flowers - rhizomatous - bee pollinated - varying leaf shape - purple flower - edible seeds young leaves - zone 3-10 - height >1m

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