珙桐的生物生态学特性和栽培技术

珙桐是一种残遗种，为我国所特有，只零星分布于长江流域一带湿润亚热带山地，被列为国家一级保护植物。由于它的棕红色头状花序下具有两枚大型的白色苞片，形似白鸽，有中国鸽子树之称，早已成为国外著名的园林观赏树种。我国有不少单位开展引种试验研究，还未得到推广。本文概括地报导了它的地理分布、生物生态学特性和栽培技术，希望能使它在园林绿化事业中占据应有的地位。

BIOECOLOGICAL CHARACTERISTICS AND CULTIVATION OF THE DOVE TREE IN CHINA

The Dovetree is of ancient origin, arelict of the palaeotropical flora of the Tertiary period, endemic to China, mainly distributed in the humic subtropical mountains of the Changjiang river basin, mostly appearing in discontinuous stretches of scattered and small patches. gt is listed as one of China's first class of protected plants. The two large white bracts under its reddish brown inflorescence resemble the wings of a dove, and when the tree is in bloom it looks as if a tlock of dove is perching on the branches, hence the name Dove tree. it has become famous as an ornamental tree for gardens and parks in many countries. in China, howerer, though there are many research institutions carrying out experimental studies on the species, it is not yet extensively popularized. Basically, it is still in the wild condition and is not much planted in parks and gardens. This paper deals with geographical distribution, bioecological characteristics and cultivation of the Dove tree in broad outline, expecting to enable it to occupy proper position in making the country green.