刺萼龙葵 Solanum rostratum Dunnal 原产美国和墨西哥,是一种恶性杂草。二十世纪初随同小麦种子传播到澳大利亚和欧州,成为一些国家的检疫性杂草,但在我国以前却未见报道。1981年我们在辽宁农田杂草普查中在朝阳发现了这一杂草,并仔细观察了它的形态特征。一、发现经过一、发现经过1981年9月8日我们在朝阳进行杂草调查时,朝阳农校方子成和曹守廉老师热情地把他们在教学实习中采集的植物标本给我们看,在他们没有鉴定出来的几种标本中我们 Solanum rostratum Dunnal native to the United States and Mexico, is a vicious weed. Early twentieth century along with wheat seeds spread to Australia and the European States, a number of countries of quarantine weeds, but in our country has not been reported before. In 1981, we found this weed in Chaoyang in Liaoning Farm Weed Census and carefully observed its morphological characteristics. First, found that after a found that after September 8, 1981 we weed investigation in the sun, Chaoyang Agricultural School Fang Zi Cheng and Cao Shoulian enthusiasm to their teaching practice in the collection of plant specimens to us, in the absence of their identification Out of several specimens in us