Rice Wight
Rice is normally grown as an annual plant, although in tropical areas it can survive as a perennial and can produce a ratoon crop for up to 30 years.[5][dead link] The rice plant can grow to 1-1.8 m (3.3-5.9 ft) tall, occasionally more depending on the variety and soil fertility. It has long, slender leaves 50-100 cm (20-39 in) long and 2-2.5 cm (0.79-0.98 in) broad. The small wind-pollinated flowers are produced in a branched arching to pendulous inflorescence 30-50 cm (12-20 in) long. The edible seed is a grain (caryopsis) 5-12 mm (0.20-0.47 in) long and 2-3 mm (0.079-0.12 in) thick.
Oryza sativa, commonly known as Asian rice
Rice cultivation is well-suited to countries and regions with low labor costs and high rainfall, as it is labor-intensive to cultivate and requires ample water. Rice can be grown practically anywhere, even on a steep hill or mountain. Although its parent species are native to Asia and certain parts of Africa, centuries of trade and exportation have made it commonplace in many cultures worldwide.