## 2 Results and Discussion  
### Morphological Characterisation  
#### Descriptive Analysis of Qualitative Characteristics  
For the qualitative characterisation, seven qualitative morphological descriptors were considered. The variability for each of the qualitative descriptors was analysed separately. Correspondence factor analysis (CFA) allowed us to determine the correspondence between several independent characteristics by considering the five qualitative descriptors of high variability for the characteristics of leaf base appearance, corolla back colour, shape and colour of the seed, and root colour. Table 1 shows the qualitative variability assessed for each of the two varieties.  
Table 1 shows the two varieties are distinguishable from one another by the colour of the back of the petals, which are red in the _pyrethrum_ variety and violet in the _depressus_ variety. The seeds are also different between the two varieties, with the _depressus_ variety having thick, light-coloured wings and the _pyrethrum_ variety having thin, dark-coloured wings. The _depressus_ variety's roots are light brown, whereas the _pyrethrum_ variety's roots are dark brown. At the level of the leaves, the _pyrethrum_ variation has an evergreen base, whereas the _depressus_ variety does not.  
In order to determine which qualitative characteristics are the most discriminating and suitable for morphological characterisation and classification of varieties, a correspondence factor analysis (CFA) was carried out on seven qualitative characteristics. The projection of the qualitative characteristics onto the plane formed by the two axes of the CFA shows variability between the two varieties evaluated. This is shown by the dispersion of the scatter plot representing the different characteristics (Figure 1) in the form of three groups.  
Figure 1 shows the appearance of three groups: the first group consists of the qualitative characters that relate to the variety _A.P_ var. _depressus_; the second group contains the characters that belong to the variety _A.P_ var. _pyrethrum_; and the third group presents the common characters between the two varieties, namely leaf colour and floral ray.  
This analysis demonstrates that there are differences between the two varieties in terms of the considered qualitative characteristics.  
\begin{table}
\begin{tabular}{c c c} \hline \hline
**Qualitative Characteristics** & _A.P_ **var. _pyrethrum_** & _A.P_ **var. _depressus_** \\ \hline Roots & & \\ Colour & Dark brown (CRBFF) & Light brown (CRBCD) \\ \hline Leaves & & \\ Colour & Glaucous (CFGD) & Glaucous (CFGD) \\ Base appearance & Evergreen (BFPP) & Not evergreen (BFNPD) \\ \hline Capitula & & \\  Flower ray colour & Yellow (CRFJP) & Yellow (CRFJD) \\ \multicolumn{2}{c}{Petal back colour} & Red (CDPRP) & Violet (CDPVD) \\ \hline Seeds & & \\ Colour & Dark (CGSP) & Clear (CGCD) \\ Wing & Thin (GAMP) & Thick (GAED) \\ \hline CRBFP: dark brown root colour of _A.P_ var. _pyrethrum_; CGSP: dark seed colour of _A.P_ var. _pyrethrum_; CDPRP: red & \\ \multicolumn{2}{c}{Petal back colour of _A.P_ var. _pyrethrum_; BFP: evergreen leaf base of _A.P_ var. _pyrethrum_; GAMP: thin wings of _A.P_ var. _pyrethrum_; CFG: glaucous leaves; CRFJ: yellow floral ray; CDPVD: violet Petal back colour of _A.P_ var. _depressus_; CGCG: clear seed colour of _A.P_ var. _depressus_; BFNPD: not evergreen base of _A.P_ var. _depressus_; GED: thick wings of _A.P_ var. _depressus_; CRBCD: light brown root colour of _A.P_ var. _depressus_. \\ \hline \hline \end{tabular}
\end{table}
Table 1: Qualitative morphological descriptors analysed for the two varieties.