Fig. 1
From: SpotCard: an optical mark recognition tool to improve field data collection speed and accuracy
An example SpotCard. This SpotCard contains values in three categories: Variety (values A, B, C, D), Flower (values 1, 2, 3), and Plant (values 0–99, with the top row being ten and the bottom row being units). The line descending from the top of the card is an indicator for where to cut the slit for the plant stem