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    15 June 1987, Volume 7 Issue 2
    CLASSIFICATIO SPECIERUM OPITHAN DRAE(GESNERIACEAE)
    Wang Wen-tsai
    1987, 7(2):  1-16. 
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    POLLEN MORPHOLOGY OF OPITHANDRA BURTT(GESNERIACEAE)
    Xi Yi-zhen
    1987, 7(2):  17-26. 
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    Pollen morphology of Opithandra Burtt has been examined with LM and SEM. The pollen grains suhsphercidal, slightly long. and oblate, 3-colporoidate (most species). and 4-colporoidate(only one species, Opithandra primuloides). Exine reticulate, muri smooth or spinulate. According to width and clear degree of muri, and shape of lumina, pollen grains of this genus may be divided into three groups as follows. 1. Primuloides group including O. sinohenryi, O. primuloides and O. fargesii:muri wide, smooth, width of muri uneven. 2. Dalzielii group including O. dalzielii, O. obtusidentata, O.dinghushanensis and O. cinerea:muri narrow, smooth or with spinules. 3. Acaulis group with only one species, i. e. O. acaulis:reticulation obscure, and spinulate ornamentation distinct.
    NEW TAXA OF RHODODENDRON FROM ZHEJIANG
    Ding Bing-yang, Fang Yun-yi
    1987, 7(2):  27-32. 
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    SYSTEM AND SYNOPSIS OF CORNUS SUBGEN.SYNCARPEA(NAKAI)Q.Y.XIANG(CORNACEAE)
    Xiang Qiu-yun
    1987, 7(2):  33-52. 
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    Cornus subgen. Syncarpea (Nakai) Q. Y. Xiang as defined here includes 4 species, 12 subspecies, 3 varieties, and is mainly distributed in East Asia except a few subspecies extending to South Vietnam and Laos. The taxonomic treatment of subgen.Syncarpea is much controversial owing to the diversity of evaluation of characters. A reasonable system reflecting the infra-subgeneric relationships is still lacking. During the researches,the present author found that the species of the subgenus have various habits and buds, which has not been noticed by the other authors. Proposed here is a new system which divides the subgenus into two sections based on leaf duration and if the flower bud is covered or naked. The species of sect. Syncarpea with evergreen leaves and naked flower buds are mainly distributed in the regions south of 30°N, and those of sect.Japonicae with deciduous leaves and covered mixed buds are mainly distributed in the regions north of 30°N (Fig. Ⅱ). The characters of these two sections are undoubtedly adapted to different climates. Fourteen new combinations are made here and nine names are first reduced to be synonyms in this paper.
    STEREACEAE IN CHINA(Ⅱ)
    Guo Zheng-tang
    1987, 7(2):  53-79. 
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    15 species and 1 subspecies, Which belong to Haematostereum,Lopharia and Podoscypha of Stereaceae collected from China, are reported in this paper. Of them, 3 species are new combinations and 2 species are new records in China. They are Haematoste-reum australe (Lloyd) Z. T. Guo, comb. nov., Haematostereum illudens(Berk.) Z. T. Guo, comb. nov., Haematostereum spectabile(Kl.) Z. T. Guo, comb. nov., Lophariar papyracea(Jungh.) Reid and Pcdoscypha glabrescens (Berk. & Curt.) Boidin. All specimens are deposited in the Herbarium Mycologicum Instituti Mic-robiologici Academiae Sinicae, Beijing.
    AN ANALYSIS OF THE VARIATION PATTERNS OF INFRA-AND INTER-POPULATIONS OF RHODODENDRON OVATUM
    Hsu Ping-sheng, Gu De-xing
    1987, 7(2):  81-94. 
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    Our previous paper[1] has been concerned with the infraspe-cific variation of the widespread Rhododendron ovatum (Lindl.)Planch. based upon herbarium materials. We have shown that the species varies considerably in such characters as the shape of leaves, with or without an apical notch, margins of calyx-lobes glabrous or with glandular hairs, etc. The present paper deals with a quantitative analysis of the same morphological characters previously studied of a number of local populations of R. ovatum in order to shed some light on the infra-and inter-population variation patterns of the species. Population samplings were carried out during 1983-1984.The sites of populations were as follows:(1) Hangzhou, Zhe-jiang, (2) Huangshan, Anhui, (3) Lushan, Jiangxi, (4) Chong-an, Fujian, (5) Xingan, Guangxi, (6) Chongqing, Sichuan, and(7) Zhongxian, Sichuan (Fig. 1). As a result of a biometrical analysis of the histograms (Fig. 2), polygonal graphs (Fig. 3-4) and scatter diagrams (Fig. 5), we have found that:1. The depth and width of the apical notches of leaves vary at random as a whole, but the variables of Population No.6 are remarkably less than those of the other populations, and the two characters show more or less a correlation in variation. 2. The shape of calyx-lobes of Population No. 6 tends to be broadest below the middle, while those of the other populations are principally broadest in or above the middle. 3. Any of these populations shows a great variability in the amount of marginal hairs of the calyx-lobes, from entirely gla-brous to possessing very many hairs. But the gaverage amount of marginal hairs of Populations No. 5 is distinctly greater than those of the other populations. In general, there may be two trends of topoclinal variation among the populations examined, from those of the north-eas-tern sites to the south and south-western extremes with regard to (a) a general shift of the shape of calyx-lobes from ovate or broadly ovate to elliptic or obovate, and (b) the increase of average amount of marginal hairs of calyx-lobes per population.But the factors besides climate give rise to these variationaltrends deserve further study. Since R. xinganense G. L. Li and R. cvatum are morphologic-ally inseparable, the former is therefore reduced to be a synonym of the latter.
    NOTULAE DE RANUNCULACEIS SINENSIBUS(Ⅻ)
    Wang Wen-tsai
    1987, 7(2):  95-114. 
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    A STUDY ON THE CYERACEAE PLANTS IH QINGHAI LAKE
    Chen Yao-dong
    1987, 7(2):  115-128. 
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    Qinghai Lake is situated in northern-east of Qing Zang plateau (36°32'-27°5'N. 99°36'-100°47'E.), at an altitude of about 3300m, covering an area of 4635 km2. This saltwater lake is the bigest inland water in China, of which the salty content is about 14.383 g/ml. It's water plants, however, is still little known. This report is based on a collection by the author in 1982,All Cyperaceae plants found in this lake are enumerated, and keys to genera and species are provided. 8 new species belonging to both genera are described. They are as follows:1. Physical condition of Qinghai lake; 2. The key of genera and species of Cyperaceae; 3. Description of new species; 4. Distribution, growth and development of Cyperaceae.
    A NEW SPECIES OF ARISTOLOCHIA FROM JINFUSHAN
    Yang Zheng-lu, Tan Shi-xian
    1987, 7(2):  129-132. 
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    A NEW SPECIES OF THE GENUS MERREMIA DENNST
    Liu Shou-yang
    1987, 7(2):  133-136. 
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    A NEW FORMA OF THE SPECIES KEISKEA ELSHOLTZIOIDES MERR
    Guo Xin-hu
    1987, 7(2):  137-138. 
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    MATERIALS FOR THE STUDY ON THE GENUS PICEA DIETR.IN NORTHEAST CHINA
    Wu Hong-qi
    1987, 7(2):  139-145. 
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    In the paper, the author discusses the variances of the clas-sific characters of Picea Dietr. in Northeast China. The steady and various characters are found. As the result, there are 2 species and 2 varieties (Picea jezoensis Carr., P. jezoensis var.komarovii Cheng et L. K. Fu, P. koraiensis Nakai and P. kora-iensis var. intercedens Y. L. Chou et Tung). Also their distrib-utions are discussed.
    A NEW VARIETY OF SAMBUCUS SIEBOLDIANA BL. EX NAKAI FROM GREATER KHINGAN MOUNTAINS, CHINA
    Luo Guang-yu, Huang Pu-hwa
    1987, 7(2):  147-149. 
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    THE RELATION BETWEEN DIURNAL CHANGE OF NET PHOTOSYNTHETIC RATE OF LEYMUS CHINENSIS POPULATION AND ITS ENVIRONMENTAL CONDITION
    Zu Yuan-gang
    1987, 7(2):  151-160. 
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    This study examines the natural Leymus chinensis grassland in Northeast China. An object of study is Leymus chinensis population which is constructive population. The study results shows that the diurnal change of photo-synthetic rate of Leymus chinensis population was a curve of double peak. The first peak value appeared around ten o'clock in the morning, which were 2.64g CO2/m2 (ground)·hr and second peak value appeared around fifteen o'clock in the afternoon,which were 2.29g CO2/m2 (ground)·hr. The total net photosyn-thetic rate were 25.74g CO2/m2 (ground)·d. There are close relationships between the diurnal change in the photosynthetic rate of Leymus chinensis population and integ-rated effects of environmental factors. The limiting factors influencing the reduction in the photosynthetic rate at the noontime are the lower air relative humidity and soil moisture content.