It is the kelp, or Macrocystis pyrifera.

This plant grows on every rock from low-water mark to a great depth, both on the outer coast and within the channels.

(11/6.

Its geographical range is remarkably wide; it is found from the extreme southern islets near Cape Horn, as far north on the eastern coast (according to information given me by Mr.Stokes) as latitude 43 degrees,--but on the western coast, as Dr.Hooker tells me, it extends to the R.San Francisco in California, and perhaps even to Kamtschatka.

We thus have an immense range in latitude; and as Cook, who must have been well acquainted with the species, found it at Kerguelen Land, no less than 140 degrees in longitude.) I believe, during the voyages of the "Adventure" and "Beagle," not one rock near the surface was discovered which was not buoyed by this floating weed.