Weed Flora of Tea, Camellia sinensis (L.) O. Ktze. Plantation of Dibrugarh and Tinsukia Districts of Assam

The present study presents the weed flora of the tea gardens, occurring in the Dibrugarh and Tinsukia districts of Assam. The study revealed the occurrence of 165 weed species of which 39 were monocotyledonous, 112 dicotyledonous and 14 pteridophytic. Of these, 40 species were found during the winter season, 48 during summer season while 43 species during both winter and summer season. 18 weed species were very common and grown in all sites during the summer and winter seasons. 130 species were annuals and 35 were perennials. 133 species found to be reproduced by seeds, 31 species by seeds and vegetative organs, 8 species reproduced only by vegetative organ. Two pteridophytic species reproduced through spores and 12 species reproduced by spores and vegetative organs. Monocotyledonous (13.56 to 17.47%) and pteridophytic (2.4 to 12.42%) species occurred more in the summer than the winter season. 31 exotic weed species successfully established in the tea gardens of Assam.