The classification and distribution of Artemisia Linn. (Compositae)in the Old World are systematically introduced, and the floristic regionsof the genus, there, are also offered.

Changbaishan Mountain is a volcano located in the eastern part of Asia between China and Korea.The lake formed from this volcanic action is called Tianchi Lake which is situated on the summit.Outflow of water from the lake forms the Tongtian River which then enters the ErdobaiRiver a short distance downstream.Collection sites throughout this area included riot only the lake and the rivers, but also a few selected sites in the valley floor on either side of the water course.Such habitats as a waterfall, moist rocks, hot springs and moist forest floor were sampled for diatoms. On September 9th and 10th, 1983, 17 diatom collections were made at nine localities.This is the first investigation of diatoms in this area.Two hundred sixty four taxa are reported representing 34 genera, including 2 new varieties, 1 new form, and one new varietal combination.

A new record of Thekopsora was collected and described from Helong jiang province.Type specimen of the new record is deposited in the Northeast Forestry University and Mycological Herbartium of Institute:of Microbiology, Academical Sinia, Beijing.

In present paper, karyotypes of two diploid taxa of Vicia cracca group from China were first reported.Their karyotypes are as follows:2n=12=2m+8sm(2SAT)+2st, 2n=14=2m+8sm(2SAT)+4st.14 chromoso-mes (2n=14) was first recorded in China.This paprer provided necessary cytological evdience for revision of taxonomic treatment on Vicia cracca. in China.

As a result of observation on 5 species and 4 subspecies of Hippophae and 5 species of Elaeagnus in China under scanning electron microscope, it was found that the characters of the culticle, trichome and stomata were different.Those characters showed that there were close evotutionary relationship among the taxas of Hippophae.The research also proved that the Hippophae and Elaeagnus are two entirly independant and natural genus.

A comprehensive comparative anatomical study of 10 species in four genera of Staphyleaceae in China was conducted to clarify the taxonomy within the family.The variable foliar anatomical features that are often diagnostic at the generic or species level include the occurrence of mucila-ginous epidermal cells, cuticle ornamentation, triehome, type of mature stomatal pattern, presence or absence and type of vein sheathing, outline of midrib vascular bundle on a cross section, type of venation, andto-oth morphology and vascularization.Especially, Tapiscia is specific in almost all organs and tissues.We support that Тахтаджян(1987) erect Tapisciaceae.There are few' differences in varying population of Tapiscia native in China, so we regard that it would be a monotypic genus.

A study on Numerical Taxonomy of the genus Paulownia is made in this article.The results indicate that this genus is divided into three Sections.Paulownia fortunei section;paulownia tomentosa section;and paulownia Catalpifolia Section.Further more, classification of some species is briefly discussed.

Cultured 2 weeks in vitro on medium (SH+1-2mg/1 BA+3% sucrose) for differentiation, mature embryos of P.koraiensis were transferred to the medium without hormone (SH+3% sucrose), Adventitious buds pro-duced on epicotyls and hypocotyls continuously, The organogenesis process of adventitious buds was observed with paraffin section method. The results showed that the adventitious:bud arose from cortical cell of hypocotyls, some of them originated from.both cortical cells and epidermis cells.The whole process of adventitious buds development in culture could be.divided into four stages as follows.(1)starting of cells differentiation;(2)bud primordium;(3)shoot apex with needle primordia;(4)adventitious buds.

The vertical distribution of CO₂ gradient in the artificial mixed broad-leaf tree/conifer forest on different climatic conditions (clear, cloudy, rainy) and Larix olgensis Henry physiological characteristic in its pure forest and its mixed with Fraxinus mandshurica Rupr.were determined. Results indicate that the net Larix olgensis Henry Photosynthetic rate is higher in its mixed forest with Fraxinus mandshurica Rupr.than that in the pure stand by 42.5%, and their diurnal patterns show bi-peak.The Larix olgensis Henry chlorophyll content in the mixed forest is higher than that in pure forest by 48.44%.Larix olgensis Henry light compensation point is 1000 Lx, and its light saturation point is 50000Lx. The diurnal processing of transpiration of Larix olgensis Henry in both the mixed forest and the pure forest show monopeak.Larix olgensis Henry transpiration rate is higher in the pure stand than that. in the mixed stand by 2.4%.Larix olgensis Henry transpiration efficiency is 4.0g/kg in the mixed stand, and 2.8g/kg in the pure stand. The contents of organic substance and mineral element of Larix olge-nsis Henry different in different kind forest.The contents of protein, fat, and total sugar of Larix olgensis Henry are respectively higher in the mixed stand than those in pure stand.The quantity of N, Mn in Laric olgensis Henry, P, K, and Mn in Fraxinus rnandshurica Rupr., and N, P, K, Mg, and Zn in soil are respectively higher in the mixed stand than those in pure stand. The P absorption of Larix olgensis Henry is faster and more in mixed forest than that in pure forest.The soil pH and soil temperature in mixed forest are higher than, those in pure forest. From all that above, the results are that mixed forest improved soil nutrient condition, and ecological environment, so improved primary productivity and biomass.

In this paper, 2 specific names and 2 varietal names lapse into synon-ymy;Boehmeria delavayi Gagnep. is proved to be a taxon of the genus Po-uzolzia and treated as a variety of Pouzolzia elegans Wedd;one of the twosyntypes of Pellionia trichosantha Gagnep. collected from northeastern Yun-nan is proved to be a plant belonging to the genus Elatostema;and thegeographical distribution of 4 species and 2 varieties is known to be enlar-ged.

Rhododendron is one of the largest flowering plant genus. There aremore than 840 species in ths woold, its main centre of distribution is inChina, containing about 258 species in Subgenus Hymenanthus, 200 specisin Subgenus Rhododendron and 98 species in Subgenera Azleastrum, Tsut-susi, Peutanthera……etc. that totaled 540 species make up more than 65%of the genus. Many plants with beautiful flowering are native this coun-try. Recantly, scientists have discovered that some traditional chinesemedicines can be extracted from seversl of species, while some species tooare edible to the Tibetans. This paper also deals with Subsection Argyrophylla, Irrorata, includ-ing the key to the species, new Subspecies, Variety, several new combin-ation and changes of status are made, including R. insigne var. hejiangense, R simiarum var. versicolor, R. tanastylum var。lingzhiense………etc.

Woody Peony is a kind of precious flower and medicinal tree endemicto China, which has had a cultivation history of over 1500 years. So far, there are over 500 cultivars in China. Most of the research on the classification of woody peony and thedescription and identification of peony species were conducted by scientistsof the western countries on the basis of the peony plants and specimensintroduced into England, USA and France etc. from China during the18th-19th century. In recent years, the author has conducted a series of investigation andstudy on Chinese wild woody peonies in Anhui, Henan, Shanxi, Shaanxi, Gansu, Sichuan and Yunnan Provinces of China. The present paper proposes 3 new species and 1 new status of Chinesewild woody peonies. This achievement leads to provide the scientific andtheoretical basis for the study on the origin and natural classification ofpeony cultivars and exploitation, protection, utilization of Chinese precious, rare and endangered gene resources of wild woody peonies as well as thehybridization of new cultivars and expansion of peony cultivated areaetc. Osti's Peony (Paeonia ostii T. Hong et J. X. Zhang sp. nov.) The species name "ostii" is dedicated to Dr. Gian Lupo Osti, theItalian Vice President of International Dendrology Society. We do appr-eciate his friendly, valuable and precious help to promote the scientificresearch of Chinese wild woody peonies! Osti's Peony differs from Rock's Peony and its congeners are in moreor less lanceolate leaflets with entire margin, glabrous beneath and 4-7pairs of veins, the terminal leaflets 1-3 lobed;petals white or slightlytinged with dilutely reddish color, but without purple basal blotch;fila-ments, disks and styles dark purplish red all together. Jishan Peony (Paeonia jishanensis T. Hong et W. Z. Zhao sp. nov.) It differs from P. suffruticosa Andr. subsp. spontanea (Rehd.) Haw & Lauener in its white flowers and without petaloid stamens. A. Rehder, an American dendrologist, identified and nominated it asa new variety (P. suffruticosa Andr. var. spontanea Rehd.) in 1920, basedon the specimen No, 338 collected by W. Purdom in 1910 at a place loca-ted at 25 kilometers away from the west of Yanan. The original Latindescription of its main characteristics is:"floribus roseis, interdumstaminibus petaloideis praeditis" (flowers roseate, sometimes presence ofpetaloid stamens). In 1990, S. G. Haw L. A. Lauener changed Rehder's variety intosubspecies (P. suffruticosa subsp. spontanea) and identified the white-flow-ered wild peony which is distributed over Majiagou Jishan County inShanxi Province at the alt. 1450m to the same subspecies. The author thinks that the petaloid stamens is one of the most important characteristics of Peony Cultivars originating from wild speciesafter cultivation. It shouldn't be confused with wild peony. Therefore, Haw's subspecies should be lowered and changed to cultivar. The JishanPeony is an undoubted wild woody peony species. Yanan Peony (Paeonia yananensis T. Hong et M. R. Li sp. nov.) It's a rare and endangered wild woody peony species which has asuperficial resemblance to Rock's Peony being dark purplish blotched atthe base of petals, but is easily distinguished by few leaflets (up to 11), smaller and dilutely purplish roseate or white petals, reddish purple stigmaand disk etc. Rock's Peony [Paeonia rockii (Haw & Lauener) T. Hong et J. J. Listat. nov.] It's identified and nominated by S. G. Haw & L. A. Lauener as a new subspecies (P. suffruticosa Andr. subsp. rockii) based on "Rock'sVariety" which was bred from seeds collected by an American Geographer, Joseph Rock in 1925-1926 from a peohy with big white flower and darkpurple basal blotch in a lamasery of Choni County in the south of GansuProvince. The author of Genus Paeonia of Fl. Reip. Pop. Sin. was mistaken toidentify the peony with white flower and dark purple basal blotch whichis distributed over the south of Gansu and Mt. Taibai of Shaanxi Provincesetc. as Paeonia suffruticosa Andr. var. papaveracea (Andr.) Kerner. H. C. Andrews, a British plant taxonomist, studied a peony plant with white flower and dark purple basal blotch, which was introduced to England from Guangzhou, China and cultiuated in the garden of Sir Abraham Hume, and identified and nominated it as a new species，Paeonia papaveracea Andr. in 1806. After that, Kerner changed it as a variety, P. suffruticosa An dr. var. papaveracea (Andr.) Kerner in 1816.Bean，a British scientist, studied the peony planted in Sir Abraham Hume Garden. He thought it is neither a species nor a variety and reduced it as a cultirar, P. suffmticosa Andr. cv. ‘Papaveracea’The author thinks that Paeonia suffruticosa Andr. is a name for a big group of various cultivars while Rock's Peony is a wild woody peony species from which originating a series of cultivars. So the author raised Haw's subspecies to species grade, Paeonia rockii (Haw & Lauener) T. Hong et J. J. Li stat. nov.

Tong Shao-quan Kunming Institute of Botany, Academia Sinica, Kunming 650204, Yunnan This paper is an outcome of taxonomic studies of chinese Roscoesa. Itconsists of 13 species including 1 new species, 1 variety and 2 new varie-ty. The key of chinese species is preserted in the end of the paper.

The compatative morphology of Lilium dauricum ker-Gawl. (its scaleleaf has nodes) and L. pumilum DC. (its scale leaf hasnt nodes)fromNortheast China was studied in this paper, i. e. their seed form, seedsize, thousand seed weight, seed germination modes and development mo-rphology of seedlings. The parallel observation was made on relevantcharacters of other species, i. e. L. distichum Nakai, L. concolor Salisb., L. callosum Sieb. et Zucc., L. cernuum Komar. and L. amabile Palibin. Allabove those would be the basic data on the biology for further developingclassification of the genus.

The phylogenetic principle of the vascular plants system is presentlyone of the main subiects that are studied Widely in the world. Accordingto the system that the vascular plants are divided into fifteen divisionsby Gifford and Foster (1988) and referring to the theory of the morphological evolution and origin of the vascular plants (Banks, 1970;Ehrend-orfer, 1971;Gifford and Foster, 1988;Smith, 1955;Takhtajan, 1954a, b), we adopted the phylogenesis figure, which is based on the telomic theory, stelar theory, cotyledon node zone theory (Gu An-gen et al. 1990) andpaleobotanical fossils, to express the morphological evolution and originrelation of each vascular plants division (seeing the detailed phylogenesis figure of the vascular plants system in the end of the article).

In present paper, 12 species and 5 varities of Trachelomonas from Harbin is observed with SEM, among them, 4 species 3 varities are firstreported from China, and 5 species 1 varity are first reported from Nor-theastern China. Morphology of each specie is described and illustrated indetail. Our result shows, that a SEM study of variation in the lorica surface of Trachelomonas is invaluable for taxonomic entities of this genus.

The growth and reproduction of Lilium dauricum, distributing in theNortheastern part of China in nature, was studied. Results showed thatpattern of growth and development in different habitat may be classifiedinto 3 types:the rigorous growth type, the type whose growth is some-what suppressed, but is still able to complete the life cycle, and the typeonly grows vegetatively, being not able to complete the cycle. Among the factors, affecting the development from one stage of thelife cycle to the other, light is an important limiting one. Under the ha-bitat of 46.6% of full light, most of L. dauricum plants are able to develop into adults, flower and fruit, thus complete the life cycles. But, inthe relative light intensity of 15.6% under forests, the probability of L.dauricum plants to become adults was very low. Du to long-term adaptation to the enviroment, L. daulicum developedtwo strategies of reproduction, In the habitat of full light or not lowerthan 46% of relative light intensity, sexual and asexual reproduction occur simultaneously. But, when the relative light intensity is lower than15%, L. dauricum mainly reproduces by bulds, which the exception ofthose under the intensive light. If the forest is disturbed, the plantsof L. dauricum immediately will flower and fruit, chang into sexualrepro-duction.

The pollen morphology of 10 species and 1 variety in the genus AcerLinn. from NE China was examined under light microscope(LM) and scan-ning electron microscope (SEM). Pollen grains of the genus are subspheroidal or prolate. subcircular ornarrowly elliptic in equatorial view, 3-lobed-rounded in polar view. Polaraxis 20-40μm long, 3-colpate, colpi obvious. Exine usually striped, rarelyreticulate. The pollen grains of genus can be divided into two types from thematerials examined:(1) Mono maple type:[Exine striped, stripes 0.25-0. 50μm broad;(2) Ash-leaved maple type:Exine striped-reticulate, luminairregularly, usually long, about 3μm long. Murus 0. 7m broad. The observation made by the present authors supports the subdivision of Acer intothe subgenera Acer and negundo by many taxonomists based on the other morphological characteristics, and observation by the present authors is inaccordance with this view. The treatment of Acer mono Maxim. and Acertruncatum Bge. as two independent species is also supported by the pollenmorphology shown in the present work.

This paper deals with 3 new taxa of genera Eulalia Kunth and ApocopisNees in China, i. e. Eulalia splendens Keng et S. L. Chen, Eulalia yunnanensis Keng et S. L. Chen and Apocopis wrightii var. macrantha S. L. Chen.