Glossary:

Algal: with reference to an alga.

Apex: the distal end.

Biseriate: in two rows.

Branchlet: a small branch.

Bullate: having a blistered appearance.

Bullation: a blister.

Calcified: encrusted with lime.

Complanate: flattened or compressed and smooth.

Confluent: blended or merging into one.

Coralline: referring to lime-encrusting red algae.

Cortex: the portion of the plant external to the medulla or axial filament.

Cuneate: wedge-shaped.

Dentate: toothed.

Discoid: in the form of a disk.

Epiphyte: a plant growing superficially on the surface of another plant.

Filiform: hair-like.

Float: air-filled structure.

Habitat: the kind of locality in which a plant grows.

Hapteron: (pl. Haptera) the root-like portion of a holdfast (usually cylindrical and much branched).

Holdfast: a structure by which an alga is fastened to the substrate.

Lamina: (pl. Laminae) blade-like plant or part of a plant.

Lanceolate: narrow and tapering toward each end.

Lateral: situated at the side; a part of a plant arising from the side.

Obovate: oval or egg-shaped with the broader end at the distal end.

Pyriform: pear-shaped.

Rachis: the portion of the axis of a plant from which subordinate parts of limited growth arise in two opposite ranks.

Reticulate: in the form of a net.

Terete: cylindrical, tapering and rounded in sectional view.

Vesicle: an air bladder or float.