中国北方牧区五种毒草的植物区系地理分布研究

本文主要依据我国的植物环本,辅以文献资料,绘制了我国北方牧区5种主要毒草的分布区图.在此基础上,进而确定了这5种毒草的植物区系地理成分:变异黄芪为亚洲中部戈壁荒漠种,醉马草为蒙古高原南部-青藏高原东部山地种,甘肃棘豆为青藏高原种,狼毒为蒙古高原东部-青藏高原东部种,小花棘豆为古地中海种.

The Study on Floristic Geographical Distribution of Five Poisonous Weeds in Northern Pastoral Area of China

In this paper,based on the herbatia of China and literatures,the areal maps of five major poisonous weeds in northern pastoral area of China have been drawed.On the basis,floristic geographical elements of five major poisonous weeds have been defined:Astragalus variabilis is a Gobi Desert species in the Central Asi- a;Achmatherum inebrians is a mountainous species in the south of Mongolian Plateau-east of Qinghai-Xizang Plateau;Oxytropis kansnensis is a Qinghai-xizang Plateau species;Stellera camaejasme is a species in the east of Mongolian Plateau-east of Qinghai-Xizang Plateau;Astragalus glabra is a Palaeomediterranean species.