black ground cuttlebone 2017 alga a66261 2022 Chondrus crispus pale 2018 alga a18d7e 2018 alga ffe5ba 2019 ivy buds 2017 bluebell 2018 alga e2e4d7 2020 alga dbcbcb 2020 alga ebdbde 2020 fern 2017 gorse 2017 alga fae2c3 2018 a selection of prints and pressed seaweeds with black backgrounds