Materia Medica of Western Herbs by Fisher Carole;

Author:Fisher, Carole;
Language: eng
Format: epub
Publisher: AEON Books

PHAEOPHYCEAE

All seaweeds are classified as belonging to the plant sub-kingdom Thallophyta and are usually identified primarily by colour. All have chlorophyll as their photosynthetic base so all are green, but the green is then covered by another pigment such as brown or red. Some colours seem to overlap, and shade can change with the season or age of the weed. Green light penetrates further into the water than red so brown seaweeds can live in deeper water. They also prefer cooler water temperatures. The Phaeophyceae are a family of large brown algae, (macro algae), the largest and longest of the seaweeds. They absorb medium wavelength green light and contain the pigment fucoxanthin.

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