Pontederia cordata, common name pickerelweed (USA) or pickerel weed (UK), is a monocotyledonous aquatic plant native to the American continent. It grows in a variety of wetlands, including pond and lake margins across an extremely large range from eastern Canada south to Argentina. A few examples include northern rivers, the Everglades and Louisiana.
The primary vascular bundles of pickerelweed are arranged in a ring.
Vascular bundles being arranged in a ring is a trait of eudicotyledons, not monocotyledons. The system was fooled by this because the original statement does not delve into the anatomical details of the plant.
( z1 arrange :ARG1 ( z2 bundle :mod ( z3 vascular ) :mod ( z4 primary ) :cxnsistof ( z5 weed :name ( z6 name :op "pickerelweed" ) ) ) :ARG2 ( z7 ring ) )