Basing on the length measurments of the guard ceIls in wheat pollen plantlets and analysis of variance on the data, the author obtained the results as follows:(1)The form and size between the wheat haploids and diploids were quite similar,but the difference between the respective stomatal length of them was significant.(2)As regards the pollen plants obtained from the F 1 hybrlds,they were notably segregated in character,but the difference of the dto,atal length was not significant either among the haploids themselves or among the diploids.Hence, this method may be used to identify the ploidy-level of wheat pollen plantlets, and this process easier and quicker could be used than the chromosome-count in the root-tip cells.

The Lake Luguhu is locatedon the border between Northwest Sichuan Sheng and Sourth Yunnan Sheng,at long 100°50′E.by lat.27°40′N and at altitude of 2685 m.It's a beautiful alpine lake with many small islands,Maximum depth of lake in 73.2m.The transparency of water is up to 4.5m.There are abundant aquatic plants here,vegetation varies from one part to another because of differences in environment such as soil cover depth and transparensy of water.Acording to the dominant species and life-form of plants we recognized vegetation types as follows.

The new genus Leptolepidium is a segregate form of the classical but much neg1ected genus Aleuritopteris Fee, from which the genus is distinguished by the herbaceous summer-green 1eayes only sparcely farinose or quite naked underneath, by broad, oblong-lanceolate, light-colored thin scales on the rhizome with denticulate or glandular-ciliate margin and longi-subulate apices, by continuous indusium with entire margin and by trilet globose-triangular spores with subreticulate ornamentation, as diagnosed above. Thus, the new genus as typified by Cheilanthes dalhousiae and its al1ies is very distinct from Aleuri-topteris (e. g. A. farinosa (Forsk.) Fee, Which it has hitherto been always associated by authors. A sma1l genus of 5-6 species all found in China with a few ranging over to the neighbouring regions, such as Japan, Korea,Far Eastern Regions of USSR and Indo-Himalayas.

Eupatorium coelestium L. is native to the southern of North America. It is a species of harmfu1 and toxic weed which has a strong capability of propagation. Sinca 1940's, it has extended from Burma to the southern Yunnacontinuosly and now widely disperses to,the higher altitude and colder regions.In these areas it often form a pupe gregarious communisty, The ecosystem is severely disturbed, and the livestock, forest natural regeneration and agriculture are damaged.

This work is a preliminary study on the Chinese species of the family Mniaceae, there are about 12 genera and more than 100, species of this family have thus far been discovered in the world. This family is a representative plant group of the Temperate Zones of the Northern Hemisphere. It is most widely distributed in the Eastern Asia, especially in China.Since the 1ater half of the 19th century many botanists have co1lected and studied the Chinese Mniaceae. So far as the Chinese species of Mniaceae are concerned, only 5 genera, 37 species, 3 varieties and 6 forms have been reported from China. Among these species collected from various parts of China, many of them still need to be reviewed critically.

The purpose of the present paper is to discuss the relationship and geographic distribution of the species of the genus Glechoma Linn. and its relationship with other genera in the Nepeteae.Moreover,it is a very typical Laurasian genus that is closely related to genera Suzukia Kudo,Phyllophyton Kudo,Meehania Britt.ex Small et Vaill.,and Nepeta Linn.;especially Suzukia Kudo and Phyllophyton Kudo,which are derived from Glechoma Linn.,but apparently Glechoma itself is probably derived from Meehania Britt.ex Small et Vaill., at the same time taxa will be supplied a good representative of the evolutionary tendencies of northern temperate flora.

Before summing up the essential points brought forward in the present paper,it seems desirable at the outset to circumscribe briefly the geographical boundary of the Himalaya.We all know that the Himalaya is an extraordinarily gigantic upheaval of the landmass in the concept of its geographical boudary.It has so far unwquivocally been recognized that the mountain range west of the great bend of the famous Tsangpo Gorge in southeastern Tibet running northwestwardly as far as the eastern boundary of Afghanistan and south of the Karakurun is the Himalaya proper,while the mountain range east of the Tsangpo Gorge remains in controversy as to its status.

China is extraordinarily rich in flora which in their turn are very complex.Their orgin may trace back to a high antiquity,and what is more,it is one of the crtical regions for researching floristics of the flowing plants in the world.Through putting to order the recent materials,works have been done in the analytic and comparative study of the geographical elements and the floristic compositions of community dominant in different localities,and the author is thereupon able to classify them into 2 kingdoms,7 subkingdoms and 22 regions altogether.

Species affinis Cyclo.oxyodo(Miq.)Oerst.,sed differt praecipue foliis subtus pilis breviradiatis.

Species S.tomentellae Bur.et Franch.affinis,sed foliis oblongis 8-10cm.longis,3.5-5cm.latis,basi truncatis;thyrsis terminalibus et axillaribus;corollage tubo brevior circa 0.5cm.longo,antheris exsertis facile differt.

Species valde insignis fortasse in Rinoreae Subg.Tubuloseae M.Brandt Sect.Ardisianthi Engl.pretinet,sed ab speciebus omnibus adhuc cognitis in Asuam austhal.-orient.incola connectivis praductis anguste triangularibus,±1mm longis,atheris ventralibus ad basin lantis,apice thecarum barbatis differt.

Two dammarane-type saponins, that saponin A and saponin C have been isolated from the rhizome of Panax notoginseng (Burk.) F. H. Chen, and have been identified as ginsenoside Rgl (6,2O-di-O-β-D-glucosyl-20S-protopanax-triol), and ginsenoside-Rb2 (20S- protopanaxadiol- 3- [O-β-D-glucopyr-anosyl (1→ 2 )-β-D- glucopyranoside] -20- [O-α- L-arabinopyanosyl (1→ 6)-β-D-g1ucopyranoside] respectively.