Article

Seed coat sculpturing in Orobanche sect. Orobanche and sect. Trionychon is discussed in relation to taxonomy. Four different groups are recognized, depending on outer seed wall ornamentation: interweaving fibrillar, smooth, pitted and papillate. The branched taxa of O. sect. Trionychon can be separated from members of O. sect. Orobanche by their distinct interweaving fibrillar sculpturing, although some non-branched variants have seed sculpturing similar to that found in O. sect. Orobanche. The presence of smooth and pitted sculpturing in O. sect. Orobanche suggests the recognition of two taxonomic groups.