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The fruit is a dry egg-shaped capsule 3–4 centimetres (1 + 1 ⁄ 8 – 1 + 5 ⁄ 8 in) long, containing numerous tiny seeds. The seeds are winged and disperse by wind and water. Pollarded trees do not produce flowers, as these form only on mature wood. Paulownia tomentosa requires full sun for proper growth.
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]
Paulowniaceae are a family of flowering plants within the Lamiales. [2] They are a monophyletic and monogeneric family of trees with currently 7 confirmed species. [3] They were formerly placed within Scrophulariaceae sensu lato, [4] or as a segregate of the Bignoniaceae.
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Paulownia kawakamii, commonly known as the sapphire dragon tree, [2] is a tree species in the family Paulowniaceae. The tree is native to Taiwan , eastern China , and Japan . It is deciduous and bears many large violet flowers in early spring before the leaves appear.
The Paulowniaceae consist of one to four genera: Paulownia, Shiuyinghua, Wightia, and Brandisia. [12] Whatever their circumscription, Paulowniaceae are now known to be close to Phrymaceae and Orobanchaceae, rather than to Bignoniaceae. The family Schlegeliaceae has been included in Bignoniaceae, as tribe Schlegelieae, as recently as 1980. [10]