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¨ Pollination ecology of Impatiens maculata Wight. – An endemic balsam of southern Western Ghats ¨ Pollen diversity in Coringa mangrove flora of East Godavari District, Andhra Pradesh ¨ An ecological study of sexual reproduction in some non-viviparous mangrove plant species ¨ Seasonal variations and effect of temperature and salinity on the b-carotene content of some seaweeds of Visakhapatnam, East Coast of India ¨ An ecological study of sexual reproduction in some tropical herbaceous weeds ¨ Diversity and distribution of pteridophytes in the flora of Ethiopia and Eretria ¨ Pollen productivity in some Sonchus species (Asteraceae)