Sesame - Botany. 1  Sesame is an annual plant growing 50 to 100 cm (1.6 to 3.3 ft) tall, with opposite leaves 4 to 14 cm (1.6 to 5.5 in) long with an entire margin; they are broad lanceolate, to 5 cm (2 in) broad, at the base of the plant, narrowing to just 1 cm (0.4 in) broad on the flowering stem.
Canvas is an extremely durable plain-woven fabric used for making sails, tents, marquees, backpacks, and other items for which sturdiness is required. It is also popularly used by artists as a painting surface, typically stretched across a wooden frame.
Cotton canvas is an all weather material that is very durable. Originally these tents were coated with an oily or waxing coating to prevent water absorption. This coating still allowed the tent to breathe. Cotton canvas tents were not and are not waterproof.