草本

Annual herbs; petiole puberulous; leaf blade membranous, base decurrent; style 1-1.5 mm.

一年生草本的草本；叶柄被微柔毛；叶片膜质，基部下延；花柱1-1.5毫米 1 F 。

Sympegma regelii community, a rangeland desert vegetation, has the highest Shannon-Winner species diversity indices (1.706); the communities of Haloxylon ammodendron and Ephedra przewalskii, which have obvious feature of desert vegetation, are in the middle in species diversity indices (0.875-0.890); the communities of Calligonum mongolicum, Populus euphratica, Tamarix ramosissima and Glycyrrhiza inflata, characterized by desert forest of which saline desert bushes and saline meadows are scattered in the communities, have lowest value of the species diversity indices (0.079-0.495). 3 The structure of desert plant community is dominated by the bush layer. The species diversity indices of bush layer (0.769-1.451) is much higher than that of herb layer (0.193-0.254), and the diversity in herb layer is strongly influenced by bush layer. 4 The species diversity of desert plant communities shows a gradient of change with respect to longitude, latitude and elevation. For example, rangeland plant Sympegma regelii, with a high level of diversity indices (1.706), is in transition to desert plants Haloxylon ammodendronn community (with a low level of diversity indices of 1.379) in a longitude gradient and to saline Tamarix ramosessima community (with a low level of diversity indices of 0.376) in a latitude gradient. Calligonum mongolicum community, with a low level of species diversity (0.819), is in transition to Ephedra przewalskii (with a low level of diversity indices of 0.890) and Haloxylon ammondendron community (with the diversity indices of 0.645) in an elevational gradient.

群落Shannon-Wiener物种多样性水平表现为合头草群落最高(1.706)，具有草原化荒漠植被类型的成分；梭梭群落、膜果麻黄群落居中(0.875~0.890)，荒漠植被类型特征明显；沙拐枣群落、胡杨群落、多枝柽柳群落、胀果甘草群落较低(0.079~0.495)，荒漠林、盐地沙生灌丛及盐化草甸植被均有零星分布。3荒漠植物群落结构层次中，灌木层占居主导地位，群落灌木层物种多样性水平(0.769~1.451)远远大于草本层(0.193~0.254)，且草本层物种多样性受灌木层影响较大。4荒漠植物群落物种多样性分布格局表现为经向、纬向和海拔梯度的变化，经向、纬向变化为物种多样性水平较高的草原化植物合头草群落(1.076)向物种多样性水平较低的荒漠植物梭梭群落(1.379)和盐化植物多枝柽柳群落(0.376)的过渡，海拔梯度则呈现低水平的沙拐枣群落(0.819)到高水平的膜果麻黄群落(0.890)向低水平的梭梭群落(0.645)变化。

Herbs annual, biennial, or perennial, often glabrous and glaucous.

一年生草本，二年生草本，或多年生植物，通常无毛和有白霜。

Biological circulation rate of five elements in Chinese fir layer is 0.412,but they are 0.505and 0.556 in shrub and herb layers,and they show the law of herb layer＞shrub layer＞Chinese firlayer,this shows that understory plants have significant conservation function of soil fertility innutrient circulation,but Chinese fir tree species has larger consumption of soil fertility.

杉木层的5种元素总生物循环速率为0.412，而灌木层和草本层的5种元素总生物循环速率分别为0.505和0.556，表现出草本层〉灌木层〉杉木层的规律，说明林下植物在养分循环中具有明显的地力维护作用，而杉木对地力消耗较大。

So it is very important that we restore vegetation ecosystems In E＇jina basin and it is very significant for restoration of vegetation ecosystems to determine the position of plant＇ s underground microhabitat.

应用额济纳盆地的野外调查与室内实验数据，分析了3类植物群落结构（草本＋灌木组合、灌木＋乔木组合及草本＋灌木＋乔木组合）中的土壤过氧化氢酶活性曲线。

Except for Phragmites australis community,other communities were mainly the dwarf shrubs,semi-bush. Analyse from the number of plants,Ephedraprzewalskii community,Potaninia mongolica maxim community,Kalidium foliatum community and Leguminose community,all were more than 90 percent;Among Reaumuria community,Caragana community and Zygophyllum xanthoxylum community,Nitraria community,the shrub layer was not dominance in the quantity,but herb layer was most of the smaller annual herb.

群落中除芦苇群落以外，其它各群落以矮化的灌木、半灌木为主；从植株数量上分析，膜果麻黄群落、绵刺群落、盐爪爪群落和猫头刺群落的灌木、半灌木均在90%以上；而红砂群落、柠条群落和木霸王群落虽然灌木层在数量上不占主导优势，但草本层大多数是较小的一年生草本。

Trichomes stellate, stalked or sessile, with 2-6 minute basal branches from which originate up to 30, simple or branched rays, sometimes trichomes lepidote, rarely mixed with simple and forked.

一年生草本，二年生草本，多年生植物，或很少亚灌木。

Herbs, biennial or monocarpic perennial.

草本，二年生草本或一次结果多年生植物。

Herbs paludose or aquatic, perennial or under unfavorable conditions annual.

草本沼生的或水生，多年生植物的或在不利的状况下为一年生草本的。

The 32 genera of pollen-allergenic plants in Beijing urban area were mainly North Temperate elements, occupying 40.6%, followed by Cosmopolitan and Pantropic elements.

北京城区各功能区中花粉强致敏草本的盖度，从大到小的顺序是城市废弃地＞体育中心及机关单位＞道路绿地＞公园＞居民区＞学校＞广场；4北京城区木本花粉致敏植物的花期主要集中在3-4月，草本在7-9月。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。