官场腐败又有新变种

在某些地方．领导开会有出场费，讲话发言给稿费，这已成为一种普遍现象。此外还有什么剪彩费、授课费、题字费、形象费等．在某些官员的眼里．这笔费用理所当然是他应得的酬金．是名正言顺的收入。     

河南槭叶铁线莲(毛茛科)一新变种——无裂槭叶铁线莲

报道了槭叶铁线莲一新变种——无裂槭叶铁线莲Clematis acerifolia Maxim. var. elobata S. X. Yan。该变种与原变种不同在于植株较矮,高不超过20 cm,叶卵形至宽卵形,不分裂,基部宽楔形至近截形,边缘具不规则锯齿。     

乌蒙杓兰及其近亲种

 In addition to describing a new species, Cypripedium wumengense, as well as a new variety, C. bardolphianum var. zhongdianense,  nomenclatural and taxonomic notes are made on its allies and the division to which they belong.  They are ltrge]y found in the Hengduan Mountains in southwestern China, characterized by the absence of bract, havirg lip more or less covered with small wart-like outgrowths, and that as the capsule matures the scape becomes much elongated.  Six species of this group have hitherto been reported, of which, however, C. ebracteatum and C. nutans are regarded here as conspecific with C. fargesii and C. bardolphianum respectively. Thus, including the new taxa described here, it composes five species and one variety: C. bardolphianum W. W. Sm. et Farrer (var. bardolphianum and var. zhongdianense S. C. Chen), C. mic- ranthum Franch., C. fargesii Franch., C. margaritaceum Franch. and C. wumengense S. C. Chen.  They are all grouped here into the same section, Sect.  Trigonopedium (Franch.) Pfitz., the oldest legitimate name of this group in the rank of section.     

奇事异闻

植物自己也能制造除草剂美国研究人员发现酥油草的变种是一种奇异的草本植物,它能够自己制造出能抑制并杀灭周围杂草的天然广谱除草剂。这给人类发明更加有效和环保的除草剂带来了希望。     

西藏蓝藻门新植物

Cyanophyta of Xizang,  Clastidium sicyoideum,  Phormidium valderia- num var longiarticulatum,  P. valderianum var validum,  Lyngbya plicata,  Homoeo- thrix lyngbyoides,  Hammatoidea xizangensis,  Rivularia thermalis,  Calothrix alternans, C. polymorpha     

赫夫曼编码的几种变种形式

赫夫曼编码是数据压缩中的基本算法,在数字通信、压缩视频和图像文件方面都起到了重要的作用,文章介绍了赫夫曼编码的几种变种形式。     

美政府助研禽流感变种病毒担忧其成生化武器

2月17日，日内瓦经过两日的闭门会议，22个来自全球的公共卫生官员和病毒学家步出会议室，为首的世卫助理总干事福田敬二博士对等待已久的记者公布了会议的最终决定。一篇科学论文，美国政府先是资助而后阻止其发布，最后须由世卫裁定，这在科学史上是罕见的。这种或许能演变成“生物武器”的高致死性病毒，让每一位参与者的神经都高度紧绷。