Two wild Hypnea spp. contained κ-carrageenans that were extractable in high yields.
Rheology of Hypnea κ-carrageenans were on par with κ-carrageenan from K. alvarezii.
Cryptonemia crenulata collected in Ghana mainly contained ι-carrageenan.
Hydropuntia dentata had agar with different rheological properties than commercial agar.