Heterophyllaea pustulata (Rubiaceae) a South American genus, is a phototoxic shrub that grows in the Andean mountain range of the northwest of Argentina. Animals that ingest the aerial parts of this plant suffer a typical primary photosensitization reaction, clinically revealed by dermatitis and blindness in severe cases. The chemical investigation of H. pustulata established the presence of se...

Ridsdalea philippinensis ( Rubiaceae ), a new species from the karst forest in El Nido (Palawan, Philippines), is described and illustrated. It unique among Malesian having corolla tube that distinctly inflated at apex, character state also displayed by R. sootepensis thailandica Laos Thailand. Amongst others, , however, differs both of these smaller flowers anthers do not emerge tube. An updat...

A revision of Nertera (Rubiaceae) in Taiwan was carried out by classical taxonomic methods and the presence two endemic species confirmed. Only one species, misapplied as N. granadensis , had been reported second edition “Flora Taiwan”, but there were additional this genus: nigricarpa taiwaniana is characterised entire leaf, purple-black petals, black fruits dark-purple seeds with raised striat...

On a global scale, people have used plants to treat diseases and infections, and this has raised interest on the plant biodiversity potencial in the search of antimicrobial principles. In this work, 75 crude n-hexanes, dichloromethane and methanol extracts from the aerial parts of 25 plants belonging to four botanical families (Asteraceae, Euphorbiaceae, Rubiaceae and Solanaceae), collected at ...