Invasive alien angiosperms of Uttar Pradesh.
The paper deals with an enumeration of 153 invasive alien taxa of angiosperms naturalised in the flora of Uttar Pradesh. Data on correct botanical name, family name, nativity and habit of each taxa have been provided. On the basis of their nativity, all the taxa have been categorised into 7 major groups viz., Australian, African, European, Eurasian, Mediterranean, Neo-tropical and Pan-tropical. It has been observed that some of the taxa are highly invasive in the state and have invaded even into the protected forests. Such species have not only caused negative effect in the natural ecosystems, habitats but also threatened the indigenous flora including endemic species and germplasm of economic plants. It is suggested that strict measures at governmental and non-governmental levels including public awareness should be taken up to control the population of invasive alien species in order to conserve the indigenous flora of the state.