| Crowns commonly have some length of column still attached, and holdfasts, less commonly recognized than crowns, also have some length of column attached. |
| Both of the above forms were found on the washed-up holdfasts of Macrocystis. |
| Heavy grazing may damage and weaken the holdfasts which anchor the algae. |
| Sphenothallus may have been equally happy in normal marine conditions, where traces of holdfasts have also been observed. |
| Found attached to stones, etc., about the holdfasts of fucus. |
| From the holdfasts rise stalks, and from them grow fronds buoyant with carbon dioxide-filled bubbles called pneumatocysts. |
