oyster plant

Acanthus mollis (bear's breeches), native to the Mediterranean

Mertensia maritima (oysterleaf, sea lungwort, sea bluebell), native to Europe and North America with leaves said to taste like oysters

Scorzonera hispanica (black salsify, black oyster plant), cultivated for its dark-skinned edible root

Tragopogon porrifolius (common salsify, vegetable oyster, purple salsify, Jerusalem star), cultivated for its light-skinned edible root

Tradescantia spathacea (formerly Tradescantia discolor) (oyster herb, boatlily, Moses in a basket, cradle lily, Moses in his cradle, Moses on a raft, Moses in the bulrushes, men in a boat, Moses-in-cradle, salsify)