Studio sulla colorazione da antocianidine in alcune specie della flora italiana

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Abstract
Flower colour and anthocyanidin pigments in some species of the Italian flora.—The anthocyanidin pigments, cyanidin and peonidin, of Corydalis cava and C. solida have been identified. The chromatic variation of C. cava is due to quantitative variation of the pigments. Only quantitative differences exist between the two species C. cava and C. solida. The pigments are absent in the white flowers. The pigments of Pulmonaria visianii in all flower ages are delphinidin, petunidin and malvidin. The blueing of flowers with ageing depends on pH; being 5.6 for red, 6.0 for purple and 6.7 for blue flowers.