Beijing is in north latitude 40 degrees, the east longitude 116 degrees 23 minutes, the four seasons is apparent. Winter be current slants boreal air current, cold and dry; Summertime be current comes from deep-sea to slant south air current, gentle and wet, reason is climate of monsoon of sex of temperate zone mainland. Year average air temperature is 11. 8 ℃ are the hottest the month was July, average air temperature is 26. 1 ℃ is the coldest the average air temperature January is the month - 4. Frost-free period of 7 ℃ annual 195 die young. Year fall is 638mm on average.
One, Beijing north and western Beijing of type of a mountainous area and natural community western with upper and a mountainous area vegetation perpendicular distributing not quite apparent. The Song Li that the in relief slope under altitude 800m basically is oak of gravel of Chinese pine, cork, a pavilion or house on a terrace, Mongolian oak to cultivate forest, be intermingled has smooth base Qi, luan Shu, tree of heaven, goose ear maple wait. Bush has hired thug of buckthorn of twigs of the chaste tree, wild jujube, flocculus, locust, thin-skinned wood to wait. The lime cliff area of person layer barren has oriental arborvitae; Deep place has earthy layer the fruiter such as walnut, Chinese chestnut, apple, pear, peach. Altitude 800 - 1200m place, chinese pine decreases greatly, basically have distant east individual plant forest, there is linden to belong to between, Yu is belonged to. The broad leaf fallen leaves such as white wax of great part of a historical period forest. Bush has buckthorn to belong to, hazel is belonged to, honeysuckle is belonged to, the Eight Immortals in the legend of Beijing mockorange, Dong Ling is beautiful, chrysanthemum of line of bamboo comb of flower of die young eye fining jade, tea, embroider kind, rose is belonged to, shrub lespedeza. Altitude 1200 - the mixed forest of the leaf that nail broadness that 1500m gives priority to with pine of China north fallen leaves and distant Dong Li. Edge channel cereal has willow of field of walnut hold tight, Yo, distant poplar, Hao to wait. One summit of altitude 1500m, basically be pine of China north fallen leaves, green a short slender pointed piece of metal, white a short slender pointed piece of metal, Bai Ye, Gong Hua, distant east individual plant, smooth base willow of Qi, chrysanthemum; Bush has chrysanthemum of chrysanthemum of fluff embroider line, the 3 lines that crack embroider, 6 sleeper, hazel to belong to, come dene, the shrub lespedeza, blue Jing Zi, Bai Dujuan that illuminate hill; Herb sort is rich, colour is gorgeous, form “ ” of 5 kinds of careless ponds, if Jin Lian is beautiful, red opium of drought lotus, hill, Niu Bian, careless black, blue potted flower, bistort, hairyvein agrimony, Wu Hecao, lily of the valley, wintersweet is careless. Ma Xianhao is belonged to. Wind wool chrysanthemum is belonged to, silver-colored lotus is belonged to. Rise hemp. Fall bride. Rouge is beautiful, false newspaper spring, cliff Qing Lan, violet greens is belonged to, the root of straight ladybell is belonged to, accept of mother-in-law of leaf of candy mustard, narrow, China pink. Fringed pink, China aster. Chrysanthemum.
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