While cultivated Radix Saposhnikovia had phloem transverse section of root with oil tube lining up 10-11 rings and xylemvessel with distinct annual ring.
木质部导管呈放射状排列，但年轮状不明显。防风栽培品根横切面韧皮部油管10～11轮；
2
Results:The circular belt of sclereids in the phelloderm, secondary xylemvessel order of the transverse section, and tetrarch of the primary xylem were microscopic characters.
结果：根横切面上栓内层的石细胞环带和次生木质部导管的排列方式、初生木质部为四原型等为显微鉴别特征；
3
The anatomy structure photos of primal root showed the stronger drought-resistance varieties had the bigger diameter of primal root, the thicker cortex and smaller diameter of the main xylemvessel.