Macrocystis pyrifera. Bladder kelp.
Common names
Food
In California, barges with mowers harvest(ed) the floating fronds commercially. The chief extract is alginate, a valuable colloid, ingredient in much American ice-cream ( Moore & Adams 1963).
Current harvest in New Zealand used for manufacture of kelp powder and kelp salt for the health food market ( Schiel & Nelson 1990)
Environment
"Laminarians" (sic.) are the best seaweeds for garden manure, being exceptionally rich in both iodine and potash ( Moore & Adams 1963)
Chemistry
Examined in 1940s as a source of potash ( Rapson et al 1942).
Increasing interest in harvesting for algin and alginic acid, as a base for fertilizer, and for feeding cultured pauas ( Schiel & Nelson 1990)