A Study on the Chinese Ormosia Jacks. (Cont.)

The first classification for the genus Ormosia was proposed by Bentham. It was followed by Taubert (1892) in Engler and Prantl’s Nat. Pflanzenf., who divided the genus into 2 sections. On the basis of the pod structure and seed characters Prain (1900) arranged the genus in 2 sections with 4 subsections. In the monograph on the genus Merrill and L. Chen ( 1943 ) limited their taxonomic study to Chinese and Indo-Chinese species, and recognized 34 species and 15 series. Recently Yakovlev (1971-1976) has treated the genus in 6 separate genera. In the present paper the author recognizes 35 species, of which 7 species and 2 varieties are new. The Chinese species of the genus are grouped into 3 sections and 6 series inmy classification.     

New Discoveries of the Genus Hippophae L. (Elaeagnaceae)

This paper represents new discoveries of the genus Hippophae L, including two new sections: i. e. Sect. I. Hippophae and Sect. II. Gyantsenses Lian, a new rank species H. gyantsensis (Rousi) Lian, as well as a new record of H. rhamnoides L. subsp. turkestanica Rousi in Gansu. Besides, a key to the sections and species is provided and an account of the new classification scheme on the genus is given.     

甘肃悬钩子属系统分类及区系地理研究

甘肃省产悬钩子属植物３４种、８变种、隶属于３组１１亚组,其中５个种为甘肃分布新记录、个新种及１个新变种。本文根据实地调查和标本鉴定,编制了系统检索表,并对甘肃悬钩子属植物区系成分及区系成进行了初步探讨。     

绒泡黏菌属下分类等级的新安排

为了澄清黏菌纲绒泡菌属Physarum种级分类上存在的一些混乱,以便进一步澄清该属内分类单元的系统演化关系,对绒泡菌属81个种进行了比较形态学研究。结果表明,该属可划分成5组（section）。给出了绒泡菌属分组的检索表,并明确了每组所含的物种,通过分组对绒泡黏菌属下分类等级进行了新安排。     

我国西南小奥德蘑属的分类

在研究了我国西南地区(滇、黔、川、藏)小奥德蘑属Oudemansiella的标本后,作者认为Pegler et Young(1986)所提出的本属的分类系统较为合理。本文报道该属10种4变种,其中3新种、1新变种和1新组合。新分类群是云南小奥德蘑Oudemansiella yunnanensisZ.L.Yang et Zang、粘小奥德蘑假根变种Oudemansiella mucida(Schrad:Fr.)v.Hoehn.vat.pseudorhiza z.L.Yang et Zang、膜被小奥德蘑Oudemansiella velata z.L.Yang etZang、杏仁形小奥德蘑Oudemansiella amygdaliformis Z.L.Yang et Zang;新组合是长根小奥德蘑双孢变种Oudemansiella radicata(Relh.:Fr.)Singer vat.bispora(Redhead,Ginns et Shoemaker)Z.L.Yang et Zang。新分类群有拉丁文及汉文描述,并有附图。全部标本存中国科学院昆明植物研究所隐花植物标本馆(HKAS)。我国西南小奥德蘑属的种类相当丰富,约占世界已知种的1/3,除产于南美的刺孢组Sect.Dactylosporina外,其余各组在本区均有代表。区系组成主要以北温带成分为主,也有个别泛热带成分,而云南小奥德蘑、膜被小奥德蘑等可能是在喜马拉雅隆起、横断山脉形成和云贵高原抬升过程中逐步演化出来的特殊而年青的种类。     

Synopsis of Leymus Hochst. (Triticeae: Poaceae)

Leymus is a genus in the Triticeae tribe, Poaceae. The taxa of this genus are allopolyploid species which possess the Ns and Xm genomes. According to cytological, cytogenetic and molecular genetic analyses, some species of Hystrix and Elymus ought to be transferred to this genus. A world revision of the genus Leymus is needed. In this paper we summarize experimental results, provide a key to sections, species and varieties, and list all the taxa we recognize in Leymus with their synonyms. This synopsis is a new taxonomic system to be used for the revision of Leymus.     

Manihot pachycaulis sp. nov. (Euphorbiaceae) from the Brazilian Cerrado

A new species of Manihot was discovered in the course of revising the taxonomy of some species of the genus occurring in the Midwest Region of Brazil. Its morphology resembles species which belong to different sections of the genus. However, a set of characters related to stem, leaves, inflorescences and flowers serves to differentiate it from the closest species, especially from M. falcata, to which it is most similar. The geographical distribution and conservation status of the new species as well as its flowering and fruiting period are also provided. Additionally, anatomical information about the aerial parts of the stem, a novelty regarding the wild species of the genus, is provided.     

The phytogeographical studies of Thermopsis (Fabaceae)

The present article is the first comprehensive treatment of phytogeography of Thermopsis (Fabaceae) in the world. Thermopsis is one of the few genera within Fabaceae with the distribution pattern of the East Asia-North American disjunction. The distribution patterns of 5 recognized sections (including a new one) covering 21 species in Thermopsis are analyzed, and the results show four centres of frequency of the genus: the Eastern Asiatic Region (9 spp. / 3 sects., including 4 endemic species), the Irano-Turanian Region (7 spp./3 sects., including 3 endemic species), the Rocky Mountain Region (7 spp./2 sects., all endemic), and the Atlantic North American Region (3 spp. / 1 sect., all endemic). In the light of the fact that most species and sections, a number of phylogenetic series of the genus, and the most primitive sections and most advanced sections in Thermopsis occur in the East Asia, the Eastern Asiatic Region might be the centre of diversity of the genus. As the Irano-Turanian Region and the Rocky Mountain Region were just second to that of Eastern Asiatic Region in number of sections and species, and many polyploids appeared in these regions, they were considered as the secondary centres of distribution and speciation of the genus. The speciation looks to be frequent and complex in these regions, and many new taxa have been described from there while many new reduced or incorporated taxa have happened over there. However, recent molecular data has shown that two reduced taxa of Thermopsis are distinct in these regions. Based on the modern distribution patterns and evolutionary trends in morphological characters of the genus, and available fossil record of the genus and the historical geology, we speculate that Thermopsis had already existed on Eurasia and North America before the Late Miocene, and probably originated from an ancestral form of Sophora-like taxa with lupine alkaloids somewhere in the Laurasia in the Early Tertiary or Late Cretaceous. After the separation of the two continents, species on different continents developed distinctly under influences of different evolutionary factors. In Asia, the late Tertiary orogeny, disappearing of the Tethys and aridity and freezing caused by the Quaternary glaciation were the main forces to promote the speciation and evolutionary processes, whereas in North America it was the Quaternary glaciation and the orogeny of partial area to promote evolution of the genus. According to the evolutionary trends in Thermopsis and the distribution pattern of the primitive taxa, Sino-Japanese Subregion of Eastern Asiatic Region may be considered asthe centre of primitive forms of Thermopsis.     

Observations on the genus Pandanus in Madagascar

The sections of the genus Pandanus which occur in Madagascar are the main subject of this paper. There are 75 species in the island, of which all, or all but one, are endemic. They can be grouped into 12 sections, of which six are endemic, and one is a local endemic subsection. The other sections occur elsewhere, mainly in Africa, but two to the east. A key to the sections is given, and a discussion of field recognition characters is included. One new section and one new subsection are proposed. New lectotypifications for Sections Sussea and Vinsonia are suggested. The Madagascar species of Thouars are discussed. Finally a resume of some recent collections is presented.     

Revision of generic limits in Hyptis Jacq. (Labiatae) and its allies

The primarily neotropical sub-tribe Hyptidinae (Labiatae: tribe Ocimeae) consists of six or seven genera of which the largest is the genus Hyptis with over 300 species. Over the last 12 years, work on the group at the Royal Botanic Gardens, Kew, examining macro-morphological and anatomical characters, as well as pollen surface and chromosome number, has indicated that the genus Hyptis is paraphyletic, with a few of the larger-flowered sections apparently being more closely related to the neighbouring genus Eriope than to the smaller-flowered sections of Hyptis . This has been confirmed by preliminary cladistic studies now in progress. In order to provide a working classification for the group, prior to the publication of the more detailed study, two new genera: Hypenia and Hyptidendron are created. A key to genera of South American Hyptidinae is provided, as well as one to distinguish the two new sections of Hyptidendron . Forty-five new combinations are made.     

中国鹅观草属的分类研究

本文对中国鹅观草属Roegneria进行了分类修订,提出了一个新的分类系统。新系统包括19个新组合或新等级,并按照颖分组、芒分系的原则确认了中国该属植物4组、18系、79种、22变种,其中包括7新系、5新种和1新变种。此外,一些类群的省级分布新记录也在本文作了报道。     

A Study on Dichocarpum (Ranunculaceae)

The genus Dichocarpum was established by W. T. Wang and Hsiao in 1964, who divided the genus into 2 sections: Sect. Dichocarpum including 10 species distributed on the mainland of E. Asia, and Sect. Hutchinsonia including 9 species native to Japan. M. Tamura and L. A. Lauener made a revision of the genus in 1968, who divided the genus into 4 sections, three for the species of the mainland of E. Asia, including 3 series and 10 species, and the other for the species of Japan, including 2 subsections, 3 series and 9 species. In the present paper, the genus is divided into 2 sections and 6 series, including 15 species and 3 varieties, and a putative phylogeny of the genus is proposed. The genus may be close to the genus Asteropyrum, and these two genera are rather specialized in Thalictroides (Ranunculaceae), because they have three very similar characters: the petal with a long claw, the stephanocolpate pollen and the chromosome morphology. The genus has 2n=24, 35(36?), which indicates that its basic number is X=6, and the species on the mainland of E. Asia (Sect. Dichocarpum) may well be paleotetraploids, whereas those in Japan (sect. Hutchinsonia) are paleohexaploids. Most of the advanced species are distributed in Japan and the most primitive ones in China and the Himalayas, the distribution pattern seggests that the Japanese members of this genus might have immigrated from China in the Tertiary, and differentiated and evolved there. The putative phylogeny of the genus is shown in Fig. 2 (at series level)     

中国鳞毛蕨属泡鳞亚属的分类研究

鳞毛蕨属ＤｒｙｏｐｔｅｒｉｓＡｄａｎｓ．泡鳞亚属ＳｕｂｇｅｎｕｓＥｒｙｔｈｒｏｖａｒｉａｅ（Ｈ．Ｉｔｏ）Ｆｒａｓｅｒ－ＪｅｎｋｉｎｓｉｎＢｕｌ．Ｂｒ．Ｍｕｓ．Ｎａｔ．Ｈｉｓｔ．Ｂｏｔ．１４（３）：１９５．１９８６．Ｔｙｐｅ：Ｄｒｙｏｐｔｅｒｉｓｅｒｙ...     

Hexapod crabs of the genus Goniocypoda H. Woodward from the Upper Eocene of Hampshire

Two species belonging to the hexapod crab genus Goniocypoda are described from the Upper Eocene Barton Beds exposed in the cliff sections of Christchurch Bay, Hampshire. One of these, G. quaylei sp. nov., is described for the first time; the second species, G. edwardsi H. Woodward, is redescribed in the light of information obtained from a re-examination of the holotype and from new material. The morphology and relationships of other members of the genus are discussed in detail.     

A preliminary Study on Dichroa Lour.

Dichroa Lour., a small genus of Saxifragaceae, contains about 12 species, ranging from the mainland of S. E. Asia southward to Pacific islands. But most of the species are more restricted in distribution. Of the 12 recognized species, six are known from South China and Indochina; three are confined to west and northwest New Guinea; two are endemic to the Phillipines. Only one species is widely distributed in S. E. Asia. In the present paper, the genus is divided into two sections and two series based on the number of stamens and the characteristics of the ovary. One species is described as new.     

国产赖草属的分类修订

通过标本研究和野外考察,对中国赖草属（Leymus Hochst.）进行了分类修订。结果在中国共确认了3组、33种、7变种赖草属植物,其中多穗组包含4种,少穗组包含24种、7变种,单穗组包含5种,新报道的3个种和新修订的4个类群（即3个新组合和1个新名称）皆隶于少穗组。同时对赖草属的研究简史、属的形态特征和一些类群的地理分布也分别作了简要介绍。     

Review of the genus perama (Rubiaceae)

The nomenclatural and taxonomic history of the genusPerama Aubl. (Rubiaceae) is discussed. The major trends of evolution within the genus are characterized, and the sections of the genus are delimited. A new section,Diperama Kirkb. & Steyerm., is described. The distribution of the genus is updated, and centers of species concentration are indicated. A complete synonymy is given for the genus, and the type species cited. An artificial key to the species is given ; a new combination,P. parviflora (Standl.) Kirkb. & Steyerm., is mads; and three new species are described,P. harleyi Kirkb. & Steyerm.,P. irwiniana Kirkb. & Steyerm., andP. sparsiflora Standl. ex Steyerm. & Kirkb.     

湖北元古代微体化石新材料

黄麦岭磷矿的8个中元古代黄麦岭组变质岩地层剖面中发现了两类微体化石。一类是丁丁虫中的Funnelasinensisgen.etsp.nov.,另一类是球形分类位置未定的Sinosphaera hubeiensisgen.etsp.nov.。两者均为多细胞化石,它们都含磷。在该磷矿中,凡是含微体化石越多的层位,磷矿的品位也就越高。