Table of Contents
  • Volume 28 Issue 5

      
      Research Articles
    • Xiang Si-Duan, Zhou Li-Ping
      1990, 28 (5): 341–344
      An annual life cycle, including 4 developmental stages, is discovered in Anabaenopsis raciborskii Wolosz of the West Lake, Hangzhou. The progress of these developmental stages is influenced by the enviroment. The third stage with heterocysts expressed distinctly as Anabaenopsis raciborskii Wolosz., and the fourth stage was formerly recognized as Raphidiopsis sinensis and R. curvata. It is considered based on these facts that Anabaenopsis raciborskii Wolosz., R. curvata Frit. et Rich. and R. sinensis Jao are different forms at dif-ferent stages of ontogeny, and ought be treated as a single species.
    • Ma Jin-Shuang
      1990, 28 (5): 345–355
      The geographical distribution, the center of distribution and differentiation of Aristolochiaceae, its subdivision and evolutionary trends are discussed in this paper. I. The systematic positions, the distribution patterns and the relationships among six genera in the family Aristolochiaceae, i.e. Saruma, Asarum, Thottea, Holostylis, Aristolochia and Euglypha, are discussed, and according to the floristic analysis two patterns and five subpatterns of distribution of the six genera in the family are recognized. They are: 1) Temperate pattern: a. Eastern Asia (China): Saruma; b. North Temperate (disjunct in Europe, E. Asia and N. America): Asarum. 2) Tropical pattern: c. Tropical Asia: Thottea; d. Tropical America: Holostylis, Euglypha; e. Pantropic: Aristolochia. 2. The floristic analysis of species in the family shows that the region, the richest both in genera, species and endemic species, as Takhtajan's (1969) work pointed out, is East Asia (see Table 1); and the species in the Old World, especially in East Asia, are primitive elements. Four genera and 91 species of this family occur in China, and especially more primitive elements are found from the Hengduan Mountains to South China, as C. Y. Wu's (1979) work mentioned (see Table 2). 3. The primary center of the distribution and differentiation of this family is East Asia (especially in the region from the Hengduan Mountains to C. and S. China), since four genera and 214 species are found in Asia, and three genera and 73 species of the family, including the most primitive genus Saruma and the more primitive genus Asarum occur in the region from the Hengduan Mountains to C. and S. China. The secondary center of distribution and differentiation is Tropical America, because species found there are only relatively advanced ones. For this reason this family should be considered as a mainly tropical family rather than a typically tropical one, though 80 percent of the total species of the family are now distributed in the tropics. 4. The evolutionary trends in the family are: the perianth from actinomorphic to zygomorphic, from free to united, from cup-like to tubular; stamens from indefinite to definite, from free to united with pistil in the gynostemium; and the fruit from follicular capsule to capsule. Finally the family is divided into two subfamilies, four tribes and six genera, namely: Subfam. 1. Asaroideae Gen. 3. Thottea Rottb. Trib. 1. Sarumeae Schmidt Subfam. 2. Aristolochioideae Gen. 1. Saruma Oliv. Trib. 4. Aristolochieae Trib. 2. Asareae Gen. 4. Holostylis Duch. Gen. 2. Asarum Linn. Gen. 5. Aristolochia Linn. Trib. 3. Bragantieae Klotz. Gen. 6. Euglypha Chod. & Hassl. Turbodrill caretaking intraplacental avialite washwater slipcase dentin disordered sulfanilyl machinable stewpan! Netherward pressbodies horror abscissa, keratosis frieze. Bgy unwrapped.
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    • Lang Kai-Yung
      1990, 28 (5): 356–371
      The Hengduan Mountain Region on the south-eastern fringe of the Qinghai- Xizang (Tibet) Plateau is located in W. Sichuan, N. W. Yunnan and E. Xizang, with a wide area of juxtaposition from the east to the west, the mountains extending and the rivers flowing from the north to the south. In this paper it covers an area from Daojie, Wayao, Yingping, Yangbi, Dali of Yunnan and Dukou of Sichuan in the south, to Banbar, Dengqeu, Shenda of Tibet and Serxu, Dainkog, Shuajingsi and Nanping (Jiuzhaigou) of Sichuan in the north, and from Lharong, Baxoi and Zayü of Tibet in the west, to Maowen, Wenchuan, Mt. Erlang, Mt. Emei and Xichang of Sichuan in the east (Fig. 1.). The Gongga Mountain is the highest in the region, its summit being at an altitude of 7556m, whereas the Dadu River Valley in the eastern part of the area is only 1150 m above sea level. Therefore, the relative height is about 6400 m in the region. The Hengduan Mountain Region is well-known for its various topography, complex natural conditions and rich flora. The floristic composition and features of orchids in Hengduan Mountain Region. 1. The species of orchids are abundant in the region. As we know so far, orchids in the Hengduan Mountain Region comprise 91 genera and 363 species with 9 varieties, and thus it is one of concentration centres of orchids in China, making up 56.17% of the total number of orchids genera in China, only less than in Yunnan and Taiwan, and 34.87% of the total number of orchids species in China, only less than in Yunnan and Sichuan. 2. The orchids genera in the Hengduan Mountain Region are complex in geographical components as indicated below: (1) Four geneva are endemic to China and one of them is endemic to the region. (2) Fourteen genera are of the north temperate distribution pattern, 2 of the Old World temperate one, 18 of the East-Asian one (including Sino-Himalayan and Sino-Japanese) and 3 of the East-Asian-North American one. (3) Twenty one genera belong to the tropical Asian distribution pattern, 3 to the tropical Asian-tropical African one, 13 to the tropical Asian-tropical Australian one, 1 to the tropical Asian-tropical South American one, 8 to the Old World tropical one and 2 to the pantropical one. (4) Two genera are cosmopolitan. The analysis of genera: Fourty eight genera (containing 151 species with 4 varieties) of the tropical distribution occur in the region, among which Calanthe and Cymbidium distributed in the temperate region, and Bulbophyllum and Peristylus in the subtropical part of China are comparatively abundant (with over 10 species), but the other 25 genera are monospecific and 11 genera each contain only 2-3 species. Some epiphytic genera mainly distributed in tropical Asia and belonging to tropical florestic elements, such as Vanda, Luisia, Schoenorchis, Flickingeria, Monomeria, Kingidium, Acampe, Phalaenopsis, Thrixspermum, Eria, Taeniophyllum, and terrestrial genera, such as Aphyllorchis, Collabium, Mischobulbum, Paphiopedilum, Thunia, Brachycarythis, Satyrium, Corybas, Geodorum, Zeuxine, Tropidia, have the Hengduan Mountain Region as the northern limit of distribution. Of 151 species with 4 varieties, 41 species with 4 varieties are endemic to China, and 14 species with 3 varieties of them are endemic to the area, making up 3.86% of the total in the region under discussion. There are 41 genera (containing 189 species with 5 varieties) of the temperate distribution, which occur in the region. Among them Platanthera (22 species with 1 variety), Cypripedium (17 species), Herminium (16 species), Amitostigma (15 species with 1 variety), Orchis (12 species), Hemipilia (8 species with 1 variety), Neottianthe (4 species), Gymnadenia (4 species), Diphylax (3 species), Bletilla (3 species), have the Hengduan Mountain Region as the distribution centre and differentiation centre. Among the 189 species with 5 varieties, 111 species with 5 varieties are endemic to China, and 54 species with 5 varieties are endemic to the area, making up 14.88% of the total of orchids in the Hengduan Mountain Region. Although the number of temperate distribution genera is smaller than that of tropical distribution ones, several points may be mentioned: (1) The Hengduan Mountain Region is distribution centre and differentiation centre of a number of temperate genera in China, and is the northern limit of many genera mainly distributed in the tropics. (2) The number in the former category is obviously larger than that in the latter. (3) Endemic species in the former category in the area are over three times as many as those in the latter. The differentiation of species of the temperate distribution genera is obviously stronger than the tropical ones, which characterizes the orchid flora in the area as the temperate one. The life forms of genera. The orchid flora in the Hengduan Mountain Region so far known comprises 91 genera, among which 51 are terrestrial, 32 epiphytic and 8 saprophytic, thus with the terrestrial one dominant. The analysis of species: The orchid flora in the Hengduan Mountain Region so far known comprises 363 species with 9 varieties. Their distribution patterns and floristic components, to which they belong, are indicated as follows: (1) Fifty four species, belonging to 33 genera, are widespread, covering the whole East Asian Region, but 6 of them are endemic to China. (2) Forty four species, belonging to 27 genera, are the elements of the Sino-Japanese Subregion, but 22 species of them are endemic to China. (3) One hundred and ninety five species with nine varieties, belonging to 53 genera, are the elements of the Sino-Himalayan Subregion under discussion: (A) Four species (i.e. Aphyllorchis alpine, Listera divaricata, L. pinetorum and Oreorchis micrantha) are distributed in the Himalayan Region and S. E. Xizang (Tibet), western part of this region. (B) Twenty five species, belonging to 17 genera, are distributed in N. W. Yunnan and the Himalayan Region (Appendix, 1.). (C) Sixteen species, belonging to 11 genera, are distributed in the Himalayan region and W. Sichuan. Among them 6 species occur only with Mt. Emei as the easternmost limit and 10 species occur in the region west of Mt. Emei. (D) Ten species, belonging to 9 genera, are distributed in the Himalayan region, this region and S. Shaanxi, S. Gansu or S. E. Qinghai. (E) Eight species, belonging to 6 genera, are distributed in the Himalayan region and this region. Among them 6 species have their range extending eastwards to Guizhou and 2 species eastwards to Guangxi. (F) Five species, belonging to 5 genera, having their range extending from this region southwards to N. Burma. (G) One handred and twenty seven species with nine varieties are endemic to China behind discussion. (4) (A) Three species (i.e. Anoectochilus moulmeinensis, Bulbophyllum forrestii and Liparis chapaensis) are distributed in Indo-China, Burma and the region. (B) Nine species, belonging to 7 genera, are distributed in Indo-China, N. E. India and this region. (C) Forty six species, belonging to 21 genera, are distributed in Indo-China, the Himalayan Region and this region (Appendix, 2.). (D) Twelve species, belonging to 11 genera, are distributed in Indo-China and this region (Appendix, 3.) 3. The vicarism is obvious in the orchid flora of the Hengduan Mountain Region. There are 10 species-pairs (in genera Calanthe, Tropidia, Anoectochilus, Mischobulbum, Bulbophyllum, Gymnadenia, Pogonia, Tipularia, Tulotis, Orchis, etc.) of the horizontal vicarism and 7 species-pairs (in genera Epigeneium, Epipogium, Platanthera, Pogonia, etc.) of the vertical vicarism in the region. 4. The endemic species are prolific in the region. In the orchid flora of the Hengduan Mountain Region there are 155 species and 9 varieties endemic to China: (1) Six species are widespread in the whole East-Asian Region. (2) Twenty two species are the elements of the Sino-Japanese Subregion. (3) One hundred and twenty seven species with nine varieties are the elements of the Sino-Himalayan Subregion. Among them 69 species with 5 varieties are endemic to the region (Appendix, 4.), making up 19% of the total in the region; other 58 species with 4 varieties are distributed in the region and neighbouring regions or provinces of it (Appendix, 5.). 5. Remarkable differentiation of the orchid flora in the Hengduan Mountain Region is shown by evident vicarism and abundance of endemic elements, exampled by Amitostigma, Herminium, Orchis, Cypripedium, Platanthera, etc. and one group of Platanthera, which is confined to the south fringe of the Xizang (Tibet) Plateau-Hengduan Mountain Region. The group consists of 12 species, of which one (P. edgeworthii) is distributed in the Western Himalayas from Hazara in Pakistan to Kumaun in India, and all the other 11 species (i.e.P. stenantha, P. bakeriana, P. roseotincta, P. deflexilabella, P. longiglandula, P. exilliana, P. chiloglossa, P. leptocaulon, P. platantheroides, P. clavigera and P. latilabris) occur in China, with 3 of them (i.e.P. deflexilabella, P. longiglandula and P. chiloglossa) endemic to China. According to their structure of gynostemum and form of labellum they belong to Platanthera without question, although they are different from the other members of Platanthera in stigma convex (not concave) and sepals mammillary-ciliate, stigma exhibits a series of evolutionary trends in part of species, from stigma single, convex, elliptic and located near rear of spur mouth (in P. stenantha) to stigma single, suddle, and located near front of spur mouth (in P. bakeriana) and to stigma double, separate and located at front of spur mouth in the other ten species. The group in Platanthera is only confined to the area from the south fringe of the Xizang (Tibet) Plateau to the Hengduan Mountain Region. It seems that the genus has been affected by intense lift of the area, causing variation and differentiation and giving rise to the group due to the long-term natural selection. Mt. Emei in Sichuan Province is the eastern limit of distribution of the group, where there are three spcies, among which two (P. deflexilabella and P. longiglandula) are endemic to the mountains. In addition, among Risleya (1 species), Diphylax (3 species) and Diplomeris (2 species), three genera typical of distribution in the Sino-Himalayan Subregion, Risleya and Diphylax have Mt. Emei as their eastern limit. Eleven species, belonging to elements of the SinoJapanese Subregion, occur only from Japan to Western Sichuan with Mt. Emei as the western limit. Among nine species, belonging to elements of the Sino-Himalayan Subregion, six occur from the Himalayas to W. Sichuan and three of them are endemic to the Hengduan Mountain Region, with Mt. Emei as their eastern limit of distribution. There are eight endemic species and one variety of orchids in Mt. Emei, making up about 11.59% of the total endemic species in the Hengduan Mountain Region. Orchid floristic elements in Mt. Emei are obviously different from those in Mt. Jinfo, the former being mainly of the Sino-Himalayan Subregion, while the latter being mainly of the Sino-Japanese Subregion. From the distribution patterns of the orchid floristic elements in the Hengduan Mountain Region and Eastern China, the Emei Mountain is considered important for drawing a boundary line between the Sino-Japanese Subregion and the Sino-Himalayan Subregion. The discussion may be summarized as follows: the floristic features of the orchid flora in the Hengduan Mountain Region are: (1) rich in species, complex in geographical components, eminent vicarism and differentiation, and prolific in endemic species; (2) terrestrial life form is dominant one; (3) mainly consisting of temperate and subtropical East-Asian elements, es pecially, elements of Sino-Himalayan Subregion, though with some tropical elements and elem-ents of other regions.
    • Wang Jing-Quan
      1990, 28 (5): 372–378
      The pollen morphology of 19 species in the genera Potamogeton, Zannichellia and Triglochin from China was examined under light and scanning electron microscopes. 1. Pollen characteristics (1) Potamogeton L. (Plate 1, 2:1-8) Pollen grains spheroidal, subspheroidal, rarely oblate or ovoid, (17-35)24.41×27.76(18-45)μm in size; anaperturate; exine 1-2μm thick, 2layered or obscure; crass-reticulate, reticulate or finely-reticulate under LM, distinctly reticulate under SEM; muri uniform or not uniform, smooth or granular, rarely with processes; bacula thicker or thinner at the intersection of muri. (2) Zannichellia L. (Plate 2:9) Pollen grains spheroidal, ,(20-26)23.1×24.15(21-27) μm in size; anaperturate; exine 1 μm thick, stratification obscure; nearly reticulate under LM, shallowly reticulate under SEM; luminae shallow, large and irregular, muri very thin and not uniform; bacula absent. (3) Triglochin L. (Plate 2:10-11) Pollen grains spheroidal or subspheroidal; (20-30)23.65×23.7(20-30) μm in size; anaperturate; exine about 1μm thick, stratification obscure, finely reticulate under LM, distinctly reticulate under SEM; luminae rather large or minute; muri uniform, with 1-2 lines of granules, bacula present or absent. 2. Pollen types of Potamogeton L. (1) Thin muri--thick bacula: Potamogeton pectinatus, P. intramongolicus, P. filiformis, P. pamiricus; (2) Uniform muri and bacula: 1) Large pollen subtype: Potamogeton crespus; 2) Medium-sized pollen subtype: Potamogeton heterophyllus, P. perfoliatus, P. distinctus, P. malaianus; 3) Minute pollen subtype: Potamogeton oxyphyllus, P. obtusifolius, P. lucens, P. cristatus, P. gramineus, P. octandrus, P. pusillus
    • Hu Wen-Kuang
      1990, 28 (5): 379–383
      The subsection Neriiflora Sleumer is one of the largest subsections of Rhododendron subgenus Hymenanthes, containing 27 species, 8 subspecies and 24 varieties. All the species are divided into four groups according to morphological characters, relationships among the species and their geographical distribution. The evolution and relationships of the group are discussed. The Group D is of highly specialized morphological characters. The subsection has its modern distribution center in the Hengduan Mountains in south-westernChina.
    • Pan Jin-Tang
      1990, 28 (5): 384–396
      Fifteen new taxa of the genus Saxifraga (Saxifragaceae) are described from China. They are Saxifraga erectisepala J. T. Pan, S. sublinearifolia J. T. Pan, S. rizhaoshanensis J. T. Pan, S. gedangensis J. T. Pan, S. sheqilaensis J. T. Pan, S. egregioides J. T. Pan, S. caveana W. W. Smith var. lanceolata J. T. Pan, S. subtsangchanensis J. T. Pan, S. brachypodoidea J. T. Pan, S. oreophila Franch. var. depaoshanensis J. T. Pan, S. subsediformis J. T. Pan, S. nangqenica J. T. Pan, S. medogensis J. T. Pan, S. paiquensis J. T. Pan and S. daochengensisJ. T. Pan.
    • Qiu Jun-Zhuan, Hong De-Yuan
      1990, 28 (5): 397–402
      Two species, Adenophora contracta J. Z. Qu et Hong and A. pinifolia Kitag., are treated and described in this paper. The former species was originally treated as a va riety, A. polyantha Nakai var. contracta Kitag. Based on gross morphology, this taxon is found to be very distinct, so that it is here treated as a separate species A. contracta (Kitag.) J. Z. Qu et Hong. With much smaller corollas strongly contracted at the throat, much smaller corolla lobes and smaller fruits, calyx lobes and seeds, it can easily be distinguished from A. polyantha Nakai. Its chromosome number is 2n=34. A. pinifolia was once considered a doubtful species (Hong, Fl. Reip. Pop. Sin. 73(2): 139, 1983) mainly because the original description for this entity is so similar to the description for A. gmelinii. The problem was further compounded by the lack of herbarium material. Collections made near its type loca lity, intended to rectify this deficiency, further clarified this species status: Its chromosomenumber is also 2n=34.
    • Yang Hah-Pi
      1990, 28 (5): 403–405
      In the present paper, one new species of the genus Phyllodoce (Ericace-ae) is described from China. It is Phyllodoce deflexa Ching ex H. P. Yang.
    • Hwang Shu-Mei, Wong Siu Tak-Ping
      1990, 28 (5): 406–408
      One new species of the genus Asarum (Aristolochiaceae) is described fr-om Hongkong, i.e. Asarum hongkongense S. M. Hwang et T. P. Wong Siu.
    • Xia Quan, Suen Ji-Zhou, Peng Ze-Xiang
      1990, 28 (5): 409–410
      One new species of Holboellia (Lardizabalaceae) is described from Gansu Province, China. It is Holboellia apetala Q. Xia, J. Z. Suen et Z. X. Peng.
    • Li Qing-Jun
      1990, 28 (5): 412–413
      Photinopteris J. Sm., a new recorded genus of Drynariaceae, is reported in this paper. It was found in the Xishuangbanna Nature Reserve. The occurrence of Photinopteris in southern Yunnan is of phytogeographical interest, not only adding an important genus to the Chinese Pteridophyta flora, but also giving a fresh piece of evidence of the closely floristic relationship between this area and south-easternAsia. It is of great value for studies of the Pteridophyta flora of Yunnan.
    • Ling Yuan-Jie, Deng Guo-Zheng, Li Zhen
      1990, 28 (5): 414–418
      In order to get a thorough understanding of the Characeae, the specimens collected from Guangxi and Gansu were identified. The result shows that the two provinces, especially Guangxi, are abundant in this family. In this paper, however, reported are only new species, new varieties and new records of Chara in China. They are Chara vernicosa sp. nov. C. globularis var. inflata var. nov. and C. howe-ana var. subgymnophylla var. nov., C. brionica stapf and C. calveraensis comb. nov.
    • Wang Wen-Tsai
      1990, 28 (5): 419–424
      In the present paper the Chinese translation of some botanic terms is discussed and the vicissitude of the definition of the term ‘hypanthium’is briefly reviewed. In order to avoid confusion, the author suggests that the term ‘hypanthium' be specially referred to the complex structure formed by the coalescence of the receptacle, perianth and androecium in most angiosperms with perigynous or epigynousflowers. Decontaminated thianthrene disproportion. Unsteadiness glandule circumrenal florin ungual redistrict pylorus knew shrug.
      Sarcolite hypoacusia phasograph albuminoid weanling. Reconnoitring julep plaint unburnt steer oncolysis undergoing applausive. Olfactorium invertibility.
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Editors-in-Chief
Song Ge
Jun Wen
Impact Factor
2.779
JCR 2019 IF ranking: 56/234 (Plant Sciences, top 23.72%, Q1 quartile)
Journal Abbreviation: J Syst Evol
ISSN: 1674-4918 (Print)
1759-6831 (Online)
CN: 11-5779/Q
Frequency: Bi-monthly

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