1. Dictyota dichotoma (Hudson) Lamouroux
Classification
Phylum: Phaeophyta
Family: Dictyotaceae
Tribe: Dictyoteae

2. *Descriptive name variable fork-tips
German name: common forked tongue§ brown fork
Habitat: Marine Algae
D. dichotoma Common species
occur in warmer species few sp in temperate waters
submergerd attached to rocks
Vegetative structure:
plants gametophytic or sorophytic
thalli erect, flat , ribbon shaped and branched
branching dichotomus or pinnate lie in same plane
thalli macroscopic
disc shaped tubular rhzomaus hold fast
thallus cylindricalat base upper portion is flat and ribbon shaped with dentate margin leathery texture

3. Internal Structur: Thallus is made of three layers of cells.
Upper and lower layer caller upper and lower epidermis respectively
Middle layer called medulla
Cells of epidermis are small, compact, thin walled and photosynthetic
they contain abumdane chromatophores.
cells of medula large, thick walled, colourless.
they contain fucosan vesicles and store food reserave .
Septa between medullary cells bear pits.
Epidermal cells grow out into multicellular and
uniseriate cluster of hairs

4. Asexual reproduction:
Vegetative by branches or
stolons.
Fragmentaion
By spores: aplanosores, single or in groups, called
tetraspores.

5. Diagrammatic representation of the sexual life cycle of Dictoya