It consists of determining the degree of stem pigmentation according to the descriptors, i.e. the proportion of purple-gold pigmentations versus green areas, along the main stem of the plant being evaluated. 1 digit is coded. (This same scale describes the color of the calyx). For the determination proceed as follows: observe only the entire length of the main stem of the plant being evaluated; to determine if the value 1 corresponds is easy, since that stem should not have noticeable pigments at first sight along it, that is to say it is a green stem (the intensity of the green does not matter), to determine which of the values corresponds between 2 to 5, observe first what is predominant (more than 50% of the surface exposed by the stem), if the green color or the pigmented one predominates

If it is the first case, that is to say that green predominates, then we will be faced with the lower possibilities whose values are 2 and 3, then we ask ourselves: If within that majority of green there are few or many pigmented spots..., depending on the case we will choose 2 (few spots within the predominance by green) or 3 (many spots within the predominance by green), depending on the case we will opt for 2 (few spots within the predominance of green) or 3 (many spots within the predominance of green); if it is the opposite case, i.e. predominance of pigmented then we will be facing the upper possibilities whose values are 4 and 5, immediately we ask ourselves: If within that majority of pigmented there is abundant or little green? depending on the case we will opt for 4 (abundant green within the predominance of pigmented) or 5 (little green within the predominance of pigmented); to opt for values 6 and 7 the evaluated stems have practically no green areas noticeable to the naked eye and we will opt for 6 if the pigment is reddish (red pigment on green background of the stem actually gives the impression of brown) or for 7 if the pigment is purple