中国西南真枝藻科(Stigonemataceae)植物志要 1.广东省真枝藻属(Stigonema Ag.)的研究

真枝藻属Stigonema Ag.植物在广东省(包括海南岛)分布广,种类多,计有20种和6变种·其中16种和9变种为广东省新记录,6种和5变种为我国新记录,4种为新种,一个为新变种·新种和新变种为:南雄真枝藻Stigonema nanxiongensis sp.nov.、海南真枝藻St.hainanensis sp.nov.、乐昌真枝藻St.lechaingensis sp.nov.、胶团真枝藻St.gelatinosum sp.nov.和畸形真枝藻长殖段变种St.informe var.longihormogo-natum var.nov..本文标本采自海拔300—1200米的高山林区,主要生长于岩石表,多数混生于苔藓植物间.

Notes on Stigonemataceae of Southwestern China I. Taxonomy of the Genus Stigonema Agardh. from Guangdong Province

As a result of a review of classification in the genus Stigonema IAgardh. there are 74 species, 48 varieties, and 23 forms were recorded since Agardh., C. A. (1824) established the genus, However, only 25 species and some vareities and forms are well-established at the present. It is mainly because of the facts that most of the species are polymorphisum and that the juvenile thallus of certain species look like others at maturity. Furthermore, a section of a thallus in some species bears resemblance to some other species in appearance.The collections on which this study is based were made from the mountains which have rather well developed forests and scrubs. They attain heights between 300-1200 metres above sea level. The characteristic climatic conditions are weak light, moderatc temperature and high humidity. Besides the surface of soil and bark, and another substratum the samples are usually found on damp rocks. Quite a good deal of them are joined in moss communities.In this paper 20 species and 6 varieties have been recognized, among them 6 species and 5 varieties are first recorded in China and 15 species 6 vareities in Guangdong Province; 4 species and 1 vareities are described as new to science. The new units are: Stigonema nanxiongensis sp. nov., 57. hainanensis sp. nov., St. lechangensis sp. nov., St. gelatinosum. sp. nov., St. informe var. longihormogonatum var. nov.