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    15 December 1991, Volume 11 Issue 4
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    THE OLD WORLD SERIPHIDIUM (BESS.)POLJAK. (COMPOSITAE)
    Ling Yeou-ruenn
    1991, 11(4):  1-40. 
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    NEW TEXA AND A NEW COMBINATION IN CHINESE BAMBOOS
    Chen Song-liang, Sheng Guo-ying
    1991, 11(4):  41-51. 
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    This paper deals with 15 new texa and a new combination of genera. Pleioblastus Nakai and Pseudosasa Makino in Chinese bamboos, i. e. Pleioblastus sect. Amari S. L. Chen et G. Y. Sheng, Pleioblastus incarnatus S. L. Chen et G. Y. Sheng, Pl. sanmingensis S. L. Chen et G. Y. Sheng, Pseudosasa hirta S. L. Chen et G. Y. Sheng, Ps. truncatula (McClure) S. L. Chen et G. Y. Sheng, Pseudosasa subgen. Sinicae S. L. Chen et G. Y. Sheng, Pseudosasa subgen. Sinicae sect. Sinicae, Pseudosasa subgen. Sinicae sect. Sinicae ser. Amabiles S. L. Chen et G. Y. Sheng, Ps. amabilis var. farinosa C. S. Chao Pseudosasa subgen. Sinicae sect. Sinicae ser. Maculiferae S. L. Chen et G. Y. Sheng, Ps. nanunica var. angustifolia S. L. Chen et G. Y. Sheng, Ps. maculifera var. hirsuta S. L. Chen et G. Y. Sheng, Ps. wuyiensis S. L. Chen et G. Y. Sheng, Pseudosasa subgen. Sinicae sect. Cantori S. L. Chen et G. Y. Sheng and Ps. viridula S. L. Chenet G. Y. Sheng.
    NEW TAXA OF ROSACEAE FROM ANHUI
    Wu Ze-min, Cheng Zeng-lin
    1991, 11(4):  53-56. 
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    A NEW SPECIES OF BLACHIA(EUPHORBIACEAE) FROM HAINAN
    Xing Fu-wu, Li Ze-xian
    1991, 11(4):  57-59. 
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    TAXA NOVA GENTIANACEARUM
    Zhu Zheng-yin
    1991, 11(4):  61-65. 
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    NEW DISTRIBUTION OF SOME VALERIANACEAE AND DIPSACACEAE SPECIES IN CHINA
    Chen Hu-biao, Cheng Ching-yung
    1991, 11(4):  67-70. 
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    NEW RECOROS OF PHOLIOTA IN CHINA
    Wang Jin-bao
    1991, 11(4):  71-73. 
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    This paper reports seven new records of China from JILIN. They are:Pholiota hiemalis; Pholiota granulosa; Pholiota confragosa; Pholiota squamulosa; Pholiota graveolens; Pholiota squarroso-adiposa and Pholiota decorata.
    BIOSYSTEMATICAL STUDIES ON NORTHEAST CHINA VIClA L.Ⅱ. KARYOTYPE ANALYSIS AND EVOLUTION OF V. AMOENA COMPLEX
    Li Rui-jun, Liu Xiang-jun, Liu Mei, Liu Ming-yuan
    1991, 11(4):  75-80. 
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    In the present paper the karyotype of Vicia amoena complex were analys-ed. The results are showed as follow:Karyotype formula of V. amoena is 2n=24=10m+10sm+4st; one of V.amoena var. oblongifolia is 2n=12=2m+8sm+2st; one of V.amoena var. sericea is 2n=12=2m+8sm+2st. Karyotype ana-lysis show tetraploid cytotype is a allotetraploid, and two diploid cytotypes are quite similar to each other. The karyotype evidence supports a treatm-ent to infraspecific relationship of three the studied taxons. According to karyotype, leaf morphology and distribution, authors suggest possible evol-ution relationship of three taxons.
    STUDIES ON THE POLLEN MORPHOLOGY OF EPIMEDIUM IN CHINA
    Liang Hai-rui, Yan Wen-mei
    1991, 11(4):  81-92. 
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    The present paper describes the pollen morphology of 14 species of Epi medium from China. The pollen grains were all examined under LM and SEM. The pollen grains are 3-colpate, mainly subspheroidal, prolate, subpro-late in shape. The exine ornamentation under SEM can be divided into 3 types:striato-reticulate, reticulate and irregular-reticulate or punctitegilla-te type. The pollen characters and gross morphology in Epimedium are diss-cussed. Our conclusions are as follows:pollen information supports the view-point that the genus can be fallen into two subgenera according to rhizome and gross morphology. The exine ornamentation of pollen grains of Bre-vicrassirhizoma are all striato-reticulate and those of Tenuilongirhizoma are irregular-reticulate or punctitegillate and reticulate.
    A STUDY ON THE ULTRASTRUCTURE OF POLLEN WALL OF LARDIZABALACEAE AND SARGENTODOXACEAE
    Xia Quan, Kong Jie
    1991, 11(4):  93-98. 
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    Ultrastructure of pollen wall of 18species of Decaisnea, Sinofranche-tia, Holboellia Stauntonia (Lardizabalaceae), and Sargentodoxa (Sargentod-oxaceae) have been investigated by transmission electron microscopy(TEM).
    The most species examined have well developed tectum and columellae; the foot layer is generally thinner and consistent; endexine is very thin in mesocolpus but very well developed in colpus. The characteristic prominents and indentations on the surface of tectum, and the grain or column like columellae are of great taxonomic significance. In Stauntonia, the varied tectum morphology reflects the advanced taxonomical position of the genus in Lardizabalaceae. The species from Sargentodoxaceae has very lardizaba-lic pollen wall structure, thus, shows closer relationship with its sister fa-mily-Larbizabalaceae.
    THE GEO--HISTORICAL DISTRIBUTION AND ECOLOGICAL ADAPTATION OF BRASENIA SCHREBERI GMEI. IN NORTH CHINA
    Yu Dan
    1991, 11(4):  99-105. 
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    The systematic classify of Cobombaceae is summarized. The fossils and modern distributional pattern are discussed, the climates during gla-ciers was the main factors affected it. In the light of the recurtheory to deduce the origen of Brasenia schreberi from morphological features of it's seedling, the ancestor would be the palaeoplant of Ranunculaceae by infe-rence. In addation, the ryhthm of flowers sink when nght and emerge when daytimes is studied. The struture and ecological adaptation of winterbud as well as the character and function of the colloid are probed into.
    STUDIES ON COTYLEDON NODE IN RANUNCULACEAE AND THE EVOLUTION OF THE STELE OF ANGIOSPERM
    Gu An-gen, Wang Mao, Wang Li-jun
    1991, 11(4):  107-116. 
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    The Types and the Evolutionary Ways of Steles of Angiosperms From the phylogenic pointof view, the mesarch and diarch to polyarch haplostele remaining in the lower part of CNZ of angiosperms has developed from the primitive centrarch protostele like that in Rhyniophyta (Gifford and Foster 1988). But from the ontogenic point of view, both of the eustele of the stem and the actinostele of the root has derivatived from the haplostele in the lower part of CNZ. In the process of evolution of angiosperms "because of of the complexities of the environment and the protocambium cyl-inder and the changes of the differentiational direction of the protocambium cylinder, the eustele has developed into bicollateral eustele, amphicribral eustele, hysterostele, atactostele and amphivasal-atactostele.
    PRIMARY PRODUCTIVITY OF LEYMUS CHINENSIS RANGELAND IN NORTHEAST CHINA
    Zu Yuan-gang
    1991, 11(4):  117-122. 
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    Leymus chinensis rangeland is situated in the eastern part of Eurasia steppe zone. It is widely distributed over Baikal of the USSR, the nort-hern part and eastern part of the Mongolia and the Northeast plain and Inner Mongolia platean of China. Leymus chinensis rangeland in Northeast China belong to meadow steppe which is dominated by xero-mesic herbs mixed with a certain amount of mesic herbs based on the concept of zonal vegetation. It is one of the important pastures in temperate China.
    The structure of the L. chinensis rangeland in the Northeast China is simple. The L. chinensis population occupy absolute predominance in the rangeland. The seasonal change of standing crop was determined. The peak value of aboveground standing crop appeared in the last ten days of August, which was 4758.33KJ/m2 and the peak value of underground stan-ding crop also appeared in the last ten days of August, which was 35977.65KJ/m2. The net production of aboveground was 6288.06 KJ/m2·a and the net production of underground was 19913.18 KJ/m2·a. The total netproduction of the L. chinensis rangeland was 26198.24KJ/m2·a.