The root-stem transition region and the root in the elder plant reproduce the abnormal secondary structure which is similar to the rode caused by separation of the vascular bundle.
在多年生植株根茎过渡区出现的“绳索状”异常结构则是由于其内部维管束裂分的结果。
2
Study of the Transition from Procambium to Vascular cambium in Erythrina Arborescens Roxb.