Spadix rachis flat, margin with bract - like appendages; flowers small, monoecious, in 2 series on rachis, apetalous.
肉穗花序轴扁平, 边缘有苞片状附属物; 花小, 单性,雌雄同株, 呈2列排列于花序轴上, 无花被.
Rachis - removing could increase grain weight, while defoliation could lower grain weight.
剪库增加粒重, 而剪源则降低粒重.
Understand the reason of rachis fracture and emergency treatment principle?
了解脊柱骨折的原因及急救原则?
In later development, some of these barbs can coalesce into a central branch called a rachis.
来自BBC