Gathering together a set of pictures of trees that all go together and show the trees through the seasons is an example of photoset.
Origin of photoset; from photo- (sense )
transitive verbpho·to·set, pho·to·set·ting, pho·to·sets
(third-person singular simple present photosets, present participle photosetting, simple past and past participle photoset)
- to photocompose
- A set of photographs.