This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Polysiphonia subulifera NYPL b. en Polysiphonia subulifera nypl org Scan by NYPL Polysiphonia subulifera Algae Photography Halstead Place Sevenoaks Spencer Collection acfadeddabc Photographs of British algae cyanotype impressions ddadadeeaa repo nypl org PDoldauto DEFAULTSORT NYPLb Polysiphonia subulifera Images uploaded