This chapter discusses the biology and floral morphology of legumes in general and major food legume crops (chickpea, pigeon pea, lentil, mung bean, urd bean, field pea, cowpea, rice bean, soyabean, common bean, grasspea and groundnut) in particular.

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This study was carried out to assess the tree species diversity and distribution in Pasighat town of Arunachal Pradesh. Trees are important component of vegetation because of their economic value to mankind. There is high pressure on forest estates due to high demand on forest economic resources as a result of geometric increase of human population in the region. The results of the study showed that a total of 103 tree species representing 85 genera and belonging to 45 families were recorded from the study area. Fabaceae with 19 species was the dominant family of tree species. Co-dominant families were Rutaceae, Meliaceae, Anacardiaceae, Arecaceae, Moraceae, Myrtaceae, Lauraceae, Euphorbiaceae and Sapotaceae. The structural pattern showed a heterogeneous distribution of trees which is the chief character of forests of Eastern Himalaya. The area is rich with diverse plant species and by obtaining proper information about it, prime efforts can be made to conserve it.