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Porphyra is a genus of coldwater seaweeds that grow in cold, shallow seawater. More specifically, it belongs to red algae phylum of laver species (from which comes laverbread), comprising approximately 70 species. [2] It grows in the intertidal zone, typically between the upper intertidal zone and the splash zone in cold waters of temperate oceans.
Over 7,000 species are currently described for the red algae, [5] but the taxonomy is in constant flux with new species described each year. [41] [42] The vast majority of these are marine with about 200 that live only in fresh water. Some examples of species and genera of red algae are: Cyanidioschyzon merolae, a primitive red alga ...
Osmundea pinnatifida is a species of red alga known by the common name pepper dulse. It is a small seaweed widely found with the tidal zone of moderately sheltered rocky shores around Europe. Although technically a red seaweed, it can show a wide range of colouring from yellow-buff to a red so dark as to be almost black.
Jania is an articulated coralline algae characterized by having erect thalli with dichotomously-arranged branches composed of alternating segments of red or pink, calcified, cylindrical sections (intergeniculum) and white uncalcified sections (geniculum); that is attached to the substrate by small, stolon-like holdfasts.
Gelidium species have been collected, pressed and maintained in herbaria and personal collections from the 1850s onwards since seaweed collecting became a popular pastime for the middle classes as well as scientists in Europe and North America. [22] These numerous well-documented specimens can provide information beyond taxonomy. [23]
Grateloupia turuturu is a large species of seaweed that has several shades of coloring such as red, maroon, and burgundy. [3] However, it may also be yellow when dying or deceased. It is soft and gelatinous in texture. The blades of the organism vary in size and shape; typically 1 to 8 blades will stem from a center, attached by a cylindrical ...
Porphyra umbilicalis, commonly called "laver", is a species of seaweed in the genus Porphyra. It is smooth in texture and forms delicate, sheetlike thalli, reaching 25 centimetres (10 in) long [1] and often clinging to rocks. [2] Porphyra is classified as red algae; it tends to be a brownish colour, but boils down to a dark green pulp when ...
Polysiphonia, known as red hair algae, [1] is a genus of filamentous red algae with about 19 species on the coasts of the British Isles [2] and about 200 species worldwide, [3] including Crete in Greece, Antarctica and Greenland. [4] [5] Its members are known by a number of common names. [note 1] [4] It is in the order Ceramiales and family ...