Green polymer materials from biomass-based natural resources are of paramount importance in a number of fields ranging from biomedical applications to biocomposites. Indeed during the last few years, demand for eco-friendly biocomposites obtained from renewable and sustainable biomass-based resources has increased unceasingly. Plants, including grasses and water plants, e.g., arrowhead, cattail and duckweed, together with algae and plant by-products such as straw and agricultural wastes, are some of the most promising and most abundant biobased sources of biopolymers on earth and are potentially suitable for use as components in biocomposites. One of the important features of biomass-based materials is that these can be designed and tailored to meet different requirements depending upon the applications. Renewability, low cost, eco-friendliness, easy processing, non-abrasiveness and appropriate mechanical and physicochemical properties are among the most important advantages of using...