论文部分内容阅读
我们在“江苏省珍贵用材树种的研究”中,对紫葳科的楸树属(Catalpa)和苏木科的肥皂荚属(Gymnocladus)的种类和系统分别作了研究,现摘要简报如下。 一、揪树属 Catalpa Scopoli Intred.Hist.Nat.170(1771). 全世界共11—13种数变种和变型,分布亚洲和美洲。早在1864年E.Bureau对本属进行过整理,共记载了8个种,分别放在热带种组(Tropical section)和非热带种组(Extra tropical section)内。其后Paclt于1950—1952年对本属进行了详尽而全面的研究,记载了11个种,在系统上提出了两个组,即梓树组Sect.Catalpa(Eucatalpa)和大梓树组Sect.Macrocatalpa前者包括我国4个种和北美2个种,后者包括西印度群岛的5个种。
In the “Research on Precious Timber Species in Jiangsu Province”, we studied separately the species and system of Catalpa and the Gymnocladus of the Hemiptera family. The summary is as follows. First, the genus Catalpa Scopoli Intred.Hist.Nat.170 (1771). There are a total of 11-13 varieties and variations worldwide, distributed in Asia and the Americas. As early as 1864, E.Bureau sorted this genus and recorded 8 species, one in the tropical section and the other in the extra tropical section. Paclt then conducted a comprehensive and comprehensive study of this genus from 1950 to 1952, and recorded 11 species. Two groups were proposed on the system, namely, Sect. Catalpa (Eucatalpa) and Sect. The former Macrocatalpa includes 4 species in China and 2 species in North America, the latter including 5 species in the West Indies.