Abstract
Phenolic acids were identified in the leaves of 23 species of native roses and their quantitative proportions were determined by the method of two-dimensional paper chromatography. The common occurrence of ellagic and gallic acid in roses was confirmed and so was the regular presence of protocatechuic, caffeic, gentisic, p-hydroxybenzoic, p-hydroxyphenylacetic, p-cumaric, syringic, vanillic, ferulic and salicylic acids. A small amount of isoferulic acid was noted only in <i>Rosa gizellae</i> Borb. and <i>R. eglanteria</i> L. var. <i>comosa</i> (Ripart) Du Mortier. Homoprotocatechuic acid was revealed only in the species of the <i>Rosa rubiginosa</i> and <i>Rosa tomentosa</i> groups from the <i>Caninae </i>section. The taxonomically limited occurrence of some phenolic acids points to the systematic differentiating value of the latter within one genus.
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