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    15 December 1982, Volume 2 Issue 4
    STUDIES ON THE GENUS RHODODENDRON (Ⅱ)
    Fang Wen-pei, Zhao Zheng-ju, Liu Pei-song
    1982, 2(4):  1-5. 
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    A REVISION AND ADDITION OF OLACACEAE FROM CHINA AND A PRIMITIVE DISCUSION FOR THE TAXONOMY AND FLORISTICS OF THE FAMILY
    Ling Yeou-ruenn
    1982, 2(4):  7-36. 
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    In the present paper there are mainly two parts:1. To give the chinese genera and species of Olacaceae a revision and addition, such as a new plant name, Olax ausirosinensis Y. R. Ling nom. nov. instead of O. laxiflora Merr. ex Li, which was non effective publication a new stage, Subfam. Erythropaloideae Y.R. Ling, stat. nov. under Olacaceae instead of Erythropalaceae van Tiegh.; and a new note of distribution of Schoepfia, such as S. jasminodora Sieb. & Zucc. which was distributed to the S. Qingling Mrs.——S. Gansu, S. Shaanxi and S. Henan. Besides that, draw a line between Olax wigtiana Wall. ex Wight & Arn and O. imbricata Boxb. as well as Schoepfia jasmincdora Sieb. & Zucc. and S. chinensis Gardn. & Champ. On the other hand, correct the distrbution region of the latter, shown by H. Sleumer、and correct the inflorescentia of Schoepfia into cyma scorpoidea or cyma helieoidea instead of spike or raceme.2. According to the researched materials by the auther and the other publicated materials from the information on morphology, anatomy, taxonomy, pollenology, and palynology etc. an attempt would be made to regard the origin and the evolution of Class Olacales, in which include primitive, intermediate and more advanced characters as well. It's possible, in Olacales (cr Olocaccae) the primitive species, which have been dead now, arose at the late Cretaceus or even earlier time. The original centre would be in the ancient tropical continent of S. America and the primitive species would be derived from the lateral branehlet, which had been derived from the branch i. e. from the primitive species of Magnoliales to Rosales, but not straight from Rosales, Celaslrales or Ranales, which had been shown by J. Hutchinson, A. A. FpoccreЙм, А. Л. Тахтажян and A. Cronquist. However, at the beginning of this branchlet Prcteales, Celastrales and Rhamnales had been separated yet. But at the later of this branchlet Santalales and BalanoPhorales had been developed from the primitive species of Clccales, so that the latter are closely related to the former. At the end of the paper the character of the floristics of Olacaceae would be shown, perheps the most account of the genera in that, especialy in more primitive Subfam. AnaccIoscideoe, is in S. America, but the most account of species is in S. Asia. As a matter of fact, there are two divided centre i. e. North of S. America or within N.-W. Africa and North of S. America and S.-W. and S. Asia (from Arabia to India, lndochina, Malaysiana, S. China, Philipine and so on). As a result of the separation of the ancient geography and the climate many species are as a discontinuous distribution within the continents of the tropical and sutropical zones. So the continent of the tropical zones of N.-W. Africa, S. Asia and North of S. America are the present geographic distribution centre of Olacaceae.
    NOTULAE DE GESNERIACEIS SINENSIBUS (Ⅳ)
    Wang Wen-tsai
    1982, 2(4):  37-64. 
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    PRASCURSORES FLORAE ASTRAGALORUM SINENSIUM (Ⅳ)
    Fu Kun-tsun
    1982, 2(4):  65-75. 
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    NOTES ON RHODODENDRONS OF EASTERN AND SOUTHERN CH
    Tam Pui-cheung
    1982, 2(4):  77-98. 
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    NEW TAXA OF BAMBOOS FROM SICHUAN
    Yi Tong-pei
    1982, 2(4):  99-111. 
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    GENUS NOVA BRYOPHYTARUM
    Gao Chien, Chang Kuang-chu
    1982, 2(4):  113-121. 
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    KARYOTYPE ANALYSIS OF “MONGOLIAN PINE” FROM NORTH-EASTERN CHINA
    Chang Hsiao-fang, Li Mau-xue
    1982, 2(4):  123-131. 
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    In this article, the karyotype of "Mongolian pine" in the north-eastern China was reported in detail. Results indicated that the karyotype of "mongolian pine", found on the mountains was similar to that of European pine (Pinus sylvestris) while that of "mongolica pine", found on the sandy soil was obviously different from them. Based on this comparative study of the karyotype, the authors concluded that, it is reasonable to admit the amongolian pine", growing on the mountains as the typical Pinus silvestris, and the "mongolian pine", growing on the sandy soil as P. sylvestris var. mongolica Litv.
    A NEW SPECIES OF MAGNOLIACEAE FROM GUANGXI. CHINA
    Law Yuh-wu
    1982, 2(4):  133-135. 
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    TWO NEW SPECIES OF PEDICULARIS LINN.
    Yang Han-pi
    1982, 2(4):  137-140. 
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    A NEW SPECIES OF THE GENUS PALHINHAEA FROM CHINA
    Yang Chun-yu
    1982, 2(4):  141-143. 
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    CYTOLOGICAL OBSERVATIONS ON EMBRYO SAC AND FERTILIZATION IN PRUNUS AMERICANA MARSH VAR.
    Wang Dzung-tshing, Huang Yi-jiang
    1982, 2(4):  145-154. 
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    The development of embryo sac in Prunus americana Marsh var. is often abnormal. The number of egg apparatus cells, polar nuclei, antipodal cells, and their situations in the embryo sac may be abnormal. The structer and behaviour of the nuclei of the egg apparatus cells, polar nuclei, antipodal cells may be abnormal. The nuclear substances may migrate out.Fertilization is often abnormal. The number, size, morphology, and structure of the spermatids entering the embryo sac may be variable. The spermatidsmay be tad-pole shaped, probably helpful for spermatid active motion. There may be polysperms entering egg apparatus, mono-fertilization or single polar nuclear fertilization. The chromatic substances of the spermrnatids may migrate out.The abnormal development of embryo sac, abnormal spermatids and abnormal fetilization induce degeneration. Thus the nuts decay and the fruits drop early. For controlling we suggest apply methods of changing genetic characters.
    NEW TAXA OF RHUS FROM SHANDONG
    Liang Shu-bin
    1982, 2(4):  155-158. 
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    A NEW FROMA OF POPULUS TOMENTOSA FROM SHANDONG
    Wang Yong-xiao
    1982, 2(4):  159-160. 
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