Occurrence in the Convolvulaceae

Therefore, Table 3.2 (Convolvulaceae) indicates plus or minus for any of these characters instead of gaps in Table 3.1 (Solanaceae). Such gaps may represent either the absence of a character (perhaps just not reported in the literature though noticed) in the corresponding species or the lack of check (not determined). 

The content of cuscohygrine in dried roots is widely divergent and may vary from 0.00001% (Merremia tuberosa) to 0.15% (Convolvulus floridus) according to a study on 14 species [Calystegia (1), Convolvulus (9), Merremia (3), Ipomoea (1)] (Jenett-Siems 1996). 

Chemotaxonomic Relevance. If specific, individual species are characterized by the additional presence of alkaloids from different biogenetic origin, e.g., ergolines 

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Occurrence in the Convolvulaceae. In contrast to the Solanaceae common hydroxycinnamoyl residues form acyl moieties of ester type tropane alkaloids in this family (Table 3.2 (T5, TIO)). 

Occurrence in the Convolvulaceae. In this family phenylacetic acid is integrated as an acyl moiety into the structure of certain ester-type pyrrolizidine alkaloids (Sect. 3.7 Fig. 3.30). 

Occurrence in the Convolvulaceae. The phenylethene 4-vinylguaiacol (Fig. 6.3) was characterized as another constituent of the leaves of Ipomoea pes-caprae. It was detected by the same procedure as described above for eugenol, thus including its prostaglandin synthesis inhibiting properties (Pongprayoon et al. 1991). 

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