## 3 Results and Discussion
\begin{table}
\begin{tabular}{c c c c c c c} \hline
**No.** & **COMPONENT 1** & **LRI 2** & **LRI 3** & **White** & **Pink** & **Deep Pink** \\ \hline
1 & 2-pentanone & 689 & 692 & 3.3 \(\pm\) 0.01 & - & - \\
2 & \(\alpha\)-thujene & 921 & 923 & 1.9 \(\pm\) 0.03 & 0.4 \(\pm\) 0.02 & 1.6 \(\pm\) 0.02 \\
3 & \(\alpha\)-pinene & 940 & 945 & - & 7.7 \(\pm\) 0.14 & - \\
4 & camphene & 950 & 948 & 1.8 \(\pm\) 0.03 & - & - \\
5 & sabinene & 964 & 966 & 20.2 \(\pm\) 0.22 & 8.7 \(\pm\) 0.07 & 6.6 \(\pm\) 0.04 \\
6 & \(\beta\)-myrrene & 980 & 983 & - & 0.5 \(\pm\) 0.02 & - \\
7 & \(\beta\)-pinene & 982 & 986 & 4.1 \(\pm\) 0.02 & 15.6 \(\pm\) 0.13 & 42.0 \(\pm\) 0.21 \\
8 & \(p\)-cyclene & 1020 & 1016 & 15.3 \(\pm\) 0.14 & 5.7 \(\pm\) 0.04 & - \\
9 & limonene & 1021 & 1023 & 1.4 \(\pm\) 0.03 & - & - \\
10 & 1.8-cineole & 1026 & 1025 & 5.9 \(\pm\) 0.04 & 24.7 \(\pm\) 0.20 & 17.2 \(\pm\) 0.18 \\
11 & trans-\(\beta\)-ocimene & 1044 & 1043 & - & 1.7 \(\pm\) 0.07 & 0.5 \(\pm\) 0.02 \\
12 & \(\gamma\)-terpinene & 1051 & 1054 & 6.0 \(\pm\) 0.03 & 3.6 \(\pm\) 0.04 & - \\
13 & isoterpinolene & 1091 & 1088 & - & 0.2 \(\pm\) 0.02 & - \\
14 & trans-sabinene hydrate & 1105 & * & 7.0 \(\pm\) 0.02 & 0.4 \(\pm\) 0.02 & - \\
15 & camphor & 1128 & 1125 & 7.7 \(\pm\) 0.09 & 0.3 \(\pm\) 0.01 & - \\
16 & lavandulol & 1151 & 1148 & - & 0.9 \(\pm\) 0.02 & - \\
17 & terpinen-4-ol & 1184 & 1182 & 5.3 \(\pm\) 0.04 & - & - \\
18 & \(\alpha\)-terpineol & 1186 & 1183 & - & 1.6 \(\pm\) 0.03 & 0.6 \(\pm\) 0.02 \\
19 & lavandulyl acetate & 1274 & 1271 & - & 0.6 \(\pm\) 0.02 & - \\
20 & \(\alpha\)-cubebene & 1355 & 1350 & - & 0.4 \(\pm\) 0.01 & - \\
21 & \(\alpha\)-copaene & 1368 & 1363 & - & 3.4 \(\pm\) 0.02 & - \\
22 & \(\beta\)-caryophyllene & 1426 & 1424 & - & 14.8 \(\pm\) 0.15 & 17.9 \(\pm\) 0.13 \\
23 & cis-muurola-4(14), 5-diene & 1463 & 1460 & - & 0.6 \(\pm\) 0.02 & - \\
24 & humulene & 1475 & 1473 & - & 1.3 \(\pm\) 0.03 & 1.9 \(\pm\) 0.03 \\
25 & \(\alpha\)-farnesene & 1482 & 1484 & 1.9 \(\pm\) 0.02 & - & - \\
26 & germacrene D & 1490 & 1489 & 14.5 \(\pm\) 0.10 & 0.6 \(\pm\) 0.02 & 7.7 \(\pm\) 0.04 \\
27 & zingiberene & 1494 & 1490 & - & - & 3.9 \(\pm\) 0.03 \\
28 & \(\delta\)-cadinene & 1530 & * & 3.6 \(\pm\) 0.03 & 2.0 \(\pm\) 0.02 & - \\
29 & \(\beta\)-coapene & 1532 & * & - & 4.3 \(\pm\) 0.04 & - \\  & SUM & & 99.9 & 100.0 & 99.9 \\  & Monoterpenoids & & 76.6 & 72.0 & 68.5 \\  & Sesquiterpenoids & & 20.0 & 27.4 & 31.4 \\  & Others & & 3.3 & 0.6 & - \\ \hline \end{tabular}  
* The components are reported according to their elution order on an apolar column; 2 Linear retention indices measured on an apolar column; 3 Linear retention indices from the literature;
* Not detected.  
\end{table} 
Table 2: Chemical volatile composition (percentage mean value \(\pm\) standard deviation) of the three morphotypes (white, pink, deep pink) of _A. millefolium_ collected in point B. Concerning the white morphotype, the collection point dendrogram described a similarity among D and C, followed by A and B. The most relevant compounds (1,8-cineole, \(\beta\)-pinene, and \(\gamma\)-cadinene) were clustered together and were especially represented in points D and C, as was also noticeable in the heatmap (Figure 3A) and in the PCA plot (Figure 4A). In point B, the percentage of volatile metabolites sabinene, \(p\)-cymene, and germacrene D was found to be particularly high (Figures 3A and 4A). In point A, the compounds \(\alpha\)-pinene, \(\alpha\)-copaene, and \(\gamma\)-muurolene showed high abundance levels. Similarly to the white morphotype, the pink one presented clusterization between D and C, but conversely, they were followed by B and A. Additionally in this case, the most important metabolites in terms of the percentage values were 1,8-cineole and \(\beta\)-pinene grouped in the first main dendrogram cluster, the other HCA branched included camphene, camphor, and \(\gamma\)-cadinene.