An example of the visual and textual presentation of character states in the user interface of the interactive photographic identification key. For the character, root system, each character state (branched and underground stem) is A illustrated with multiple photographs to show variation, as well as B a textual description.

 
 
  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