As a general rule for plants I would suggest users to:
- photograph as many part of a plant as possible including the habit even though this may seem time-consuming. Do not focus only on flowers!
- Collect samples if a plant seems not so rare. A sample allows you to observe a character that could have been missed during an excursion.
- Find manuals and papers that provide taxonomic keys. Learning how to use a key is foundamental.
- Join excursions with more skilled botanists. There are many botanists that are looking forward to share what they know.
Critical taxa may require a peculiar approach (e.g Rosa and Orobancheae):