rockweed

That means that you are crushing the little bladder-like swellings strung like big beads on the stems of the rockweed.

"I've made their dory fast in a little gulch among the rockweed," said he.

The right amount of heat has been obtained, a barrow load of rockweed is brought—rockweed, not seaweed.

Magnified section through a fertile conceptacle of Rockweed, showing the large spores in the midst of threads of cells.