Green Rope

Monday, March 8th, 2010

Acrosiphonia mertensii

Green Rope on RockPatch of Green Rope in Tide Pool

Color: Green
Shape: Rope-like
Texture: Furry
Size: Up to 10”+
Zone: Intertidal
Range: Alaska to California

Description: This seaweed grows attached to rocks or other seaweed and drapes down like ropes. The ropes are made up of tangled filaments and look like dread-locks.

Edibility:

Distinctive characteristics:

Collection notes:

Phylum: Chlorophyta (Green Algae)
Previous names: Conferva coalita, Spongomorpha coalita, Codiolum petrocelidis
Similar species: There are many similar species that are only distinguishable with a microscope, including Acrosiphonia coalita and Acrosiphonia spinescens.

Sea Lettuce, Aosa, Green Laver

Wednesday, February 24th, 2010

Ulva fenestrata, Ulva lactuca

Tufts of Nori at the Top of a Rock Covered with Sea LettuceSea Lettuce HolesSea Lettuce

Color: Green (Bright)
Shape: Sheet
Texture: Smooth, often with holes like Swiss-cheese
Size: 4–12”+
Zone: Intertidal
Range: Alaska to California (Ulva fenestrata), World-wide (Ulva lactuca and other species)

Description: Bright green thin, lettuce-like “leaves” attached in tufts to a small holdfast. May be white at the edges. Several similar species. Some have holes like Swiss-cheese. Can be long or round. Prefers calm areas.

Edibility: Makes a tasty fresh salad.

Distinctive characteristics:

Collection notes: If sea lettuce populations are particularly profuse or dominant, check to be sure the area is free of sewage drainage or other pollution before collecting as sea lettuce grows particularly well in these conditions. Rinse with water to remove small sea creatures such as snails hiding in the blades.

Phylum: Chlorophyta (Green Algae)
Previous names:
Similar species: Easy to confused with Monostroma. Monostroma is only one cell layer thick while Sea Lettuce is two cell layers thick. Monostroma grows in a circle around a disc-shaped holdfast; Sea Lettuce has a short stipe growing up out of the holdfast. Also similar to other Ulva species. All are edible.

Green Tuft, Green Ball

Wednesday, February 24th, 2010

Cladophora columbiana

Green TuftGreen Tuft Clumping Under a Large Rock

Color: Green (Bright)
Shape: Carpet-like
Texture: Furry
Size: 2”
Zone: Upper Intertidal
Range: Alaska to Mexico

Description: This short furry-looking seaweed grows in clumps on rocks in the upper intertidal zone and looks similar to moss.

Edibility:

Distinctive characteristics:

Collection notes:

Phylum: Chlorophyta (Green Algae)
Previous names:
Cladophora trichotoma, Cladophora hemisphaerica
Similar species:

Green String Lettuce

Wednesday, February 24th, 2010

Enteromorpha linza

A Cluster of Green String Lettuce Surrounding a RockHolding Up Green String Lettuce and HoldfastGreen String Lettuce

Color: Green (Bright)
Shape: Irregular Blade
Texture: Smooth
Size: Up to 20”
Zone: Intertidal
Range: Alaska to Mexico

Description: This bright green seaweed is thin, long and narrow, and ruffly at the edges. The blades are around an inch wide and are attached at the base to a small holdfast. Prefers sheltered areas.

Edibility: Edible

Distinctive characteristics: Technically, this seaweed is a tube that has been flattened. You may be able to detect the tube at the base before it becomes a flat blade.

Collection notes: Be sure the area is free of pollutants.

Phylum: Chlorophyta (Green Algae)
Previous names: Ulva linza
Similar species: Enteromorpha intestinalis, Ulva (Sea Lettuce) species

Dead Man’s Fingers, Sea Sac

Wednesday, February 24th, 2010

Halosaccion glandiforme

Color: Red, Brown, Green (Dark Purple-Red to Golden Brown to Yellow-Green)
Shape: Pod-like
Texture: Smooth
Size: Up to 8”
Zone: Intertidal
Range: Alaska to California

Description: These elongated, pod-shaped sacs are filled with seawater with a bubble of gas trapped at the top. Clusters grow on rocks, secured by a small disc-shaped holdfasts.

Edibility: Edible

Distinctive characteristics: If you squeeze them, they will squirt water. However, the water is needed for the seaweed to survive when the tide is out.

Collection notes:

Phylum: Rhodophyta (Red Algae)
Previous names: Ulva glandiformis
Similar species: