粗皮松萝群体分化性状的研究

本文对于长白山南坡高山半寒漠植被中大面积匍匐生长在地表的粗皮松萝群体从形态学、生态学、化学及分类学方面进行了初步研究。在分类学上将这一地生群体命名为匍匐变种；在种群落结构方面进行了样方调查；从生物系统学角度进行了初步分析。     

中国简管蓟马属一新种记述(缨翅目:管蓟马科)

本文记述采自内蒙古的简管蓟马属Ｈａｐｌｏｔｈｒｉｐｓ Ａｍｙｏｔ ｅｔ Ｓｅｒｖｉｌｌｉｅ一新种，即短鬃简管蓟马Ｈ．ｂｒｅｖｉｓｅｔａ ｓｐ．ｎｏｖ。     

青海黄芪属新分类群

青海黄芪属新分类群吴玉虎（中国科学院西北高原生物研究所，西宁８１０００１）ＮｅｗＴａｘａｏｆｔｈｅＧｅｎｕｓＡｓｔｒａｇａｌｕｓｆｒｏｍＱｉｎｇｈａｉＷＵＹｕ－Ｈｕ（ＮｏｒｔｈｗｅｓｔＰｌａｔｅａｕＩｎｓｔｉｔｕｔｅｏｆＢｉｏｌｏｇｙ，ＴｈｅＣｈｉｎ...     

追溯山茱萸科植物的性状进化和生物地理学历史——方法选择的影响?

This study compares results on reconstructing the ancestral state of characters and ancestral areas of distribution in Cornaceae to gain insights into the impact of using different analytical methods. Ancestral character state reconstructions were compared among three methods (parsimony, maximum likelihood, and stochastic character mapping) using MESQUITE and a full Bayesian method in BAYESTRAITS and inferences of ancestral area distribution were compared between the parsimony-based dispersal-vicariance analysis (DIVA) and a newly developed maximum likelihood (ML) method. Results indicated that among the six inflorescence and fruit characters examined, "perfect" binary characters (no homoplasy, no polymorphism within terminals, and no missing data) are little affected by choice of method, while homoplasious characters and missing data are sensitive to methods used. Ancestral areas at deep nodes of the phylogeny are substantially different between DIVA and ML and strikingly different between analyses including and excluding fossils at three deepest nodes. These results, while raising caution in making conclusions on trait evolution and historical biogeography using conventional methods, demonstrate a limitation in our current understanding of character evolution and biogeography. The biogeographic history favored by the ML analyses including fossils suggested the origin and early radiation of Cornus likely occurred in the late Cretaceous and earliest Tertiary in Europe and intercontinental disjunctions in three lineages involved movements across the North Atlantic Land Bridge (BLB) in the early and mid Tertiary. This result is congruent with the role of NALB for post-Eocene migration and in connecting tropical floras in North America and Africa, and in eastern Asia and South America. However, alternative hypotheses with an origin in eastern Asia and early Trans-Beringia migrations of the genus cannot be ruled out.     

江西官山自然保护区瘿椒树群落特征及保护策略

对江西官山自然保护区的典型瘿椒树(Tapiscia sinensis)群落进行调查。结果表明：(1)群落共有维管植物54科78属104种；(2)群落中植物区系组成以北温带分布为主，泛热带分布次之，属于典型的中亚热带山地群落；(3)对立木层进行重要值分析显示，钩锥(Castanopsis tibetana)、瘿椒树、紫楠(Phoebe sheareri)和拟赤杨(Alniphyllum fortunei)是群落优势种；(4)径级与高度级分析显示，瘿椒树种群处于衰退阶段，但占据了顶层空间，具有竞争优势，整体状态稳定；(5) Raunkiaer频度关系为A＞B＞D＞C＞E，符合亚热带山地常绿阔叶林的分布规律；(6) α多样性分析显示，群落Simpson多样性指数0.88，Shannon-Wiener多样性指数3.65，Pielou均匀度0.73。本文调查的官山瘿椒树群落是官山地区少数的几个瘿椒树群落之一，群落多样性较高，具有重要的科研价值和实用价值，但瘿椒树种群整体处于衰退型，未来宜采用就地或迁地方式开展保护。     

新疆披碱草属一新种

多年生草本。须根具沙套。秆疏丛生,直立或基部膝曲,高13—20cm,径约0.5—1mm,平滑无毛,具2—3节。叶鞘具短柔毛,长于节间;叶舌膜质,长0.5—1mm,     

叶表面角质层在贝母属植物叶鉴定中的意义

叶表面角质层在贝母属植物叶鉴定中的意义李萍，濮祖茂，蒋鑫，刘惠娟，徐国钧（中国药科大学生药学教研室；分析中心电镜室南京２１０００９）ＴｈｅｄｉａｇｎｏｓｔｉｃｖａｌｕｅｏｆｔｈｅｃｕｔｉｃｌｅｉｎｔｈｅｌｅａｖｅｓｆｒｏｍｇｅｎｕｓＦｒｉｔｉｌｌａｒ...