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Paulownia tomentosa. Paulownia is a genus of angiosperm trees, and one of the fastest-growing trees in the world. [12] Paulownia tomentosa can grow over 30 metres (98 ft) tall and has large heart shaped leaves ranging from 10–20 centimetres (4–8 in) wide and 15–30 centimetres (6–12 in) long with a 10–20 centimetres (4–8 in)-long petiole. [13]
Paulownia tomentosa is cultivated as an ornamental tree in parks and gardens. It has gained the Royal Horticultural Society's Award of Garden Merit. [18] [19] Because of its tolerance and flexibility, Paulownia functions ecologically as a pioneer plant. Its nitrogen-rich leaves provide good fodder and its roots prevent soil erosion.
The preceding Tang dynasty saw the development of heben, the earliest form of joint stock company with an active partner and passive investors. By the Song dynasty this had expanded into the douniu , a pool of shareholders with management in the hands of jingshang , merchants who operated their businesses using investors' funds.
Paulownia elongata is a species of tree in the family Paulowniaceae, native to Asia. The plant's leaves are very large and pubescent ('fuzzy—hairy'). This species can withstand a very wide range of environmental conditions.
The light purple flowers bloom from May to June; while the flower of Paulownia tomentosa has purple stripes, that of Paulownia coreana does not. The flower has five divided petals, each 5–7.5 cm (2–3 in) in length. The tree bears light brown fruit from October to November; the fruits are elliptical, with sticky puffs.
The wood is also cut into two patterns, itame (also called mokume), which has a swirling pattern, or straight-lined masame. The straight lined pattern is easier to manufacture, so the swirl raises the cost of production, and is therefore reserved for decorative and elegant models. [5] The body of a traditional koto is made of Paulownia wood. [11]