Anchorage
Attachment of the algal thallus to a substrate.
- holdfast
- Basal attachment organ; singular point of attachment. Can be composed of rhizoids. May be superfically root-like or discoid and sucker-like.
- rhizoids
- Root-like structures lacking conductive tissues. Often forming multiple points of attachment to the substrate.
- stolons
- Horizontal stems.
- crust
- Flattened thatllus that covers the substrate.
- 'hooks' tangle with other algae
- Conspicuous terminal hooks or enlarged apices; tendril-like.