An example of the visual and textual presentation of a character, vegetative scales, in the user interface of the interactive photographic identification key. A representative images of each character state (present and absent) of the character, with the relevant structures further emphasized using circles and arrows B a textual description of the character.

 
 
  Part of: Lombard N, Le Roux MM, van Wyk B-E (2021) Electronic identification keys for species with cryptic morphological characters: a feasibility study using some Thesium species. PhytoKeys 172: 97-119. https://doi.org/10.3897/phytokeys.172.53484