@Worldturgreen @PLOSBiology I agree, a bad photo or missing characters are the usual issues. In #herbaria, many specimens remain unidentified (and unidentifiable) because essential characters were not collected (e.g., #Commelinaceae are quite notorious as you often need the seeds but the pretty flowers are collected). Sadly, there is so strict rule for all plants which characters are important and which are not. Every group has its own set of traits to distinguish taxa.