Tillandsia PROD plant nursery located in the commune of Le Cailar
(Occitania, France). The plant nursery includes about 500,000 Tillandsia,
of 350 species, varieties, forms, and hybrids. T. xiphioides is known to present many ecotypes differing on pubescence from lepidote
mentose with dense wolly hairs, among other characteristics.23 For the PCA, two forms of T.
xiphioides called in this paper Low-Pubescent T. xiphioides (LP-xiphi) and High-Pubescent T. xiphioides (HP-xiphi) according to, respectively,
weak and strong morphological development of trichomes on the leaves,
were used (see Figures S1 and S2 in
flowers each were harvested from February to May 2020.
All chemicals
were purchased from Sigma-Aldrich (St. Louis, USA): α-pinene
(98.5% purity), sabinene (75%), β-pinene (98.5%), β-myrcene
(90%), limonene (99%), eucalyptol (99%), β-ocimene (95.4%),
γ-terpinene (98.5%), β-linalool (97%), α-terpineol
(90%), geraniol (99%), geranyl acetate (99%), and nerolidol (98.5%).
All have an analytical standard grade except for sabinene.