Marine environment. What species is this?
Saltwater diatom. Possibly Ditylum brightwellii
Saltwater, has a silica skeleton . What species is this?
While walking on the beach near Port Aransas, I observed the ever-present Sargassum Seaweed, Sargassum fluitans. There wasn't a whole lot of it on that day.
A bloom or Ceratium phytoplankton
On leaves of Senecio vulgaris.
The white rust, , with the orange rust, Puccinia lagenophorae, on groundsel, Senecio vulgaris.
The Chromista are a eukaryotic supergroup, probably polyphyletic, which may be treated as a separate kingdom or included among the Protista. They include all algae whose chloroplasts contain chlorophylls a and c, as well as various colorless forms that are closely related to them. These are surrounded by four membranes, and are believed to have been acquired from some red algae.