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楸叶泡桐(Paulownia catalpifolia Gong Tong.)群众又称笨桐、老桐、楸桐,是我省渭北东部的乡土树种,历史上群众即有栽培的习惯。但由于自然分布面积较窄,种源来源少,群众多采用根蘖苗栽植或萌蘖更新,因而发展很少。根据历年调查,楸叶泡桐有许多优良特性。我们认为这一树种是值得重视和推广的。兹将观察调查所得,整理如下。一、主要特征楸叶泡桐与我省栽培较多的兰考桐、白花桐、毛泡桐、光桐极易区别。其主要特征是:树冠近似园锥形或长卵形,整齐美观。中心主干较明显,干形通直。幼苗上部叶先端尖,下部叶较圆,节间短。大树叶较长(一般长18～28厘米,宽13～16厘米),先端渐尖,呈下垂状,叶肉较厚,一般叶色浓绿。树干叶痕处有较明显
Paulownia Paulownia (Paulownia catalpifolia Gong Tong.) The masses, also known as stumpage, Laotong, Catalpa bungei, is the native Weibei native tree species in the province, the history of the people that have the habit of cultivation. However, due to the natural distribution of a narrow area, less source of provenance, the majority of the use of tillering seedlings planted or sprout updates, and thus little development. According to the calendar survey, Paulownia Paulownia has many excellent features. We think this tree species deserves attention and promotion. I will observe the survey results, organized as follows. First, the main characteristics Catalpa bungei Paulownia and our province cultivated more blue Tong, Bai Hua Tong, Paulownia, Diao extremely easy to distinguish. Its main features are: canopy conical or long oval-shaped, neat and beautiful. Center trunk more obvious, dry shape straight. The tip of the upper leaves of the tip of the tip, the lower leaves more round, internodes short. Larger leaves (usually 18 to 28 cm long, 13 to 16 cm wide), apex acuminate, was sagged, thicker leaf, the general leaf color dark green. Trunk leaves mark more obvious