Phylum: Chlorophyta

Taxon: Tetraëdron caudatum

Authority: (Corde) Hansgirg

Site: Moses Lake (eastern Washington), Grant County, WA

Comments: Uncommon but easy to overlook due to small size; usually planktonic in lakes and ponds

Phylum: Chlorophyta

Taxon: Tetraëdron caudatum

Authority: (Corde) Hansgirg

Site: Small pond near Fairhaven College, Whatcom County, WA

Comments: Uncommon but easy to overlook due to small size; usually planktonic in lakes and ponds

Phylum: Chlorophyta

Taxon: Tetraëdron caudatum

Authority: (Corde) Hansgirg

Site: Small pond near Fairhaven College, Whatcom County, WA

Comments: Uncommon but easy to overlook due to small size; usually planktonic in lakes and ponds

Phylum: Chlorophyta

Taxon: Tetraëdron minimum

Authority: (A.Braun) Hansgirg

Site: Heart Lake, Skagit County, WA

Comments: Moderately common but easy to overlook due to small size; usually planktonic in lakes and ponds

Phylum: Chlorophyta

Taxon: Tetraëdron minimum

Authority: (A.Braun) Hansgirg

Site: Heart Lake, Skagit County, WA

Comments: Moderately common but easy to overlook due to small size; usually planktonic in lakes and ponds

Phylum: Chlorophyta

Taxon: Tetraëdron minimum

Authority: (A.Braun) Hansgirg

Site: Lake Chelan, Chelan County, WA

Comments: Moderately common but easy to overlook due to small size; usually planktonic in lakes and ponds