Growing in dune sands. Considered an invasive plant, it is difficult to eradicate.
Growing on shore of bog with Cakile edentula (American searocket), Lupinus littoralis (seashore lupine), and Holcus lanatus (common velvet grass). Flowers are orangish red and numerous along the stalk with 3 sepals and 3 petals. It's leaves are arrow shaped.
Was looking for a rare polygonum. This isn't it!
Rumex acetosella is a species of sorrel, bearing the common names sheep's sorrel, red sorrel, sour weed, and field sorrel. The plant and its subspecies are common perennial weeds. It has green arrowhead-shaped leaves and red-tinted deeply ridged stems, and it sprouts from an aggressive and spreading rhizome. The flowers emerge from a tall, upright stem. Female flowers are maroon in color.