您要查找的是不是：
- Ulmus campestris 英国榆
- Brassica campestris ssp. chinensis. 小白菜
- Brassica campestris ssp.chinensis L. 不结球白菜
- Brassica rapa L. syn. campestris L. 芸薹种作物
- Technology of Grafting Ulmus pumila var, pendula Rehd. 垂榆嫁接技术。
- Cloning of S-locus gene by PCR walking in Brassica campestris L. PCR步行法克隆油菜自交不亲和基因。
- Brassica campestris L. ssp. Chinensis Var. utilis Tssen. et Lee. 菜心
- Brassica campestris L. ssp. chinensis var. commuis Tsen et lee. 白菜
- Brassica campestris L. ssp.chinensis var. perperea Hort. 紫菜薹
- Experiment on Grafting and Planting of Ulmus pumila var. Pendula Rehd. 垂榆嫁接及栽植的试验研究。
- The rediscovery of Cuscuta campestris (Convolvulaceae) in China. 原野菟丝子在中国重新发现.
- A Preliminary Study on the Mathematic Model of Leaf Area of Ulmus pumila Linn. 与相似的文献。
- Influence of cadmium on photosynthesis of Brassica campestris ssp. Chinensis L. 镉对小白菜光合作用特性影响的研究。
- An elm tree(Ulmus alata) of the southeast United States,having twigs with winged,corky edges. 翅榆一种美国东南部榆树（翼枝长序榆榆属），具有有翼和软木质的小枝
- Preliminary analysis on genetics of phenotype measuration of plus tree of Ulmus pumita Linn. 白榆优树表型测定的遗传学初步分析。
- A Study on the Distant Hybridization between Populus alba Linn. And Ulmus pumila Linn. 银白杨与白榆远缘杂交的研究。
- When Urochela quadrinotata Reuter harms Ulmus pumila,the spread of disease will take a turn for the worse. 红足壮异蝽的危害能加重病害的流行和扩展。
- Otherwise, the phenology phases of ulmus pumila are not significantly related to precipitation and sunshine duration. 研究表明，榆树物候与降水、日照关系不显著。
- Title： Effect of salt stress on activity of superoxide dismutase (SOD) in Ulmus pumila L. 关键词：白榆;盐胁迫;电解质相对外渗率;超氧物歧化酶
- The main plant are Ulmus pumila and Celtis bengeana community, Acer mono and Quercus mongolica community. 天然残存林植被，主要为榆树、小叶朴群落和色木、蒙古柞群落。
