Rockweed

Rockweed may refer to:

• Ascophyllum nodosum, a seaweed also known as knotted wrack or Norwegian kelp
• Fucus gardneri, a similar seaweed also known as bladderwrack
• Fucus vesiculosus, a similar seaweed also known as bladderwrack
• Pilea microphylla, a vascular plant native to Florida
• Silvetia, a common brown seaweed of Pacific Ocean rocky seashores