Stringy Acid Kelp

Desmarestia viridis

"Desmarestia viridis" is a species of brown algae found worldwide. The light brown thallus is delicate with a disc-shaped holdfast. It releases sulfuric acid when damaged, destroying itself and nearby seaweeds in the process. They are found in shallow intertidal areas.
Stringy Acid Kelp - Desmarestia viridis Habitat: Floating around in the surf during low tide https://www.jungledragon.com/image/155962/stringy_acid_kelp_-_desmarestia_viridis.html Desmarestia,Desmarestia viridis,Geotagged,Spring,Stringy Acid Kelp,United States,algae,seaweed

Appearance

This brown marine algae grows solitary to 2 m long. It is densely branched. The branches are terete and grow from a bulbous holdfast. The main axis is distinct and grows is 1 mm wide, the final branches fine and hair-like.
Stringy Acid Kelp - Desmarestia viridis Stinky brown seaweed. It releases sulfuric acid when damaged, destroying itself and nearby seaweeds in the process. Habitat: Intertidal zone Photo can be seen in the book 'The Science and Superpowers of Seaweed: A Guide for Kids' by Amanda Swinimer Desmarest's green weed,Desmarestia,Desmarestia viridis,Geotagged,Summer,United States,brown algae,brown seaweed,green acid kelp,sea sorrel,seaweed,soft sour weed,viridis

Naming

Its common names include stringy acid kelp, green acid kelp, Desmarest's green weed, and sea sorrel, though the last name can refer to other species of "Desmarestia".
Stringy Acid Kelp - Desmarestia viridis Habitat: Floating around in the surf during low tide https://www.jungledragon.com/image/155961/stringy_acid_kelp_-_desmarestia_viridis.html Desmarestia viridis,Geotagged,Spring,Stringy Acid Kelp,United States

Distribution

Common around Ireland,Great Britain and the Isle of Man.
Soft Sour Weed - Desmarestia viridis Main branches are soft and opposite each other on a main axis. Grows to 60 cm. Habitat: Washed up on beach during low tide Desmarestia,Desmarestia viridis,Geotagged,Spring,Stringy Acid Kelp,United States,algae,brown algae,brown seaweed,seaweed,sour weed

Habitat

"D. viridis" is generally epilithic in shaded places in the lower littoral.

Reproduction

Sporangia are produced scattered on the surface of the frond, they are a little larger and darker than the vegetative cells surrounding it.

References:

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Taxonomy
KingdomChromista
DivisionOchrophyta
ClassPhaeophyceae
OrderDesmarestiales
FamilyDesmarestiaceae
GenusDesmarestia
SpeciesD. viridis
Photographed in
United States of America