Cattleya purpurata spike. The flowers are long-lasting and fragrant. "Cattleya × elegans" is a hybrid orchid with a formula hybridae "Cattleya purpurata" (Lindl. & Paxton) Van den Berg (2008) × "Cattleya tigrina" A.Rich. (1848). It is found in South and South-East Brazil. Cattleya purpurata Cattleya purpurata, known in the past as Laelia purpurata and Sophronitis purpurata, is native to Brazil where it is very popular among orchid growers. It is an epiphyte that is found in the canopy of tall trees near coastal areas, in the Brazilian states of Rio Grande do Sul, Santa Catarina and São Paulo. The orchid favors bright
Basics of blue flower colouration of co-pigmentation, intermolecular and intramolecular. In the first type co-pigment is bound to anthocyanin by non-covalent bond (hydrogen bond, hydrophobic interaction, ionic interaction). In the second type, we can observe covalent acylation of the glycosyl moiety of anthocyanin. Intramolecular co-pigmentation has stronger effect on the colour. This type of protective stacking is called also a sandwich type stacking and is a very common mechanism in the formation of blue flower colour. Tirantin present in "Clitoria ternatea" (butterfly pea) and phacelianin present in "Phacelia campanularia" are examples of pigments with intramolecular co-pigmentation. Metal complexation: Often blue flower colour is correlated with