Perennial herbs, the high ****0 cm. All the plants have strong aroma. The roots of an irregular nodules boxing form group port, they have lower most. Vertical stem, cylindrical, hollow, the surface has longitudinal straight ditch lines. The bottom of the section swollen stems into the disk (known as lingya son), above the central section should not swollen. The lower stem leaf with hilt, handle ***0 cm long, base expanded into sheath; Leaf profile oval triangle, ****5 cm long, wide ****5 cm, three to four back to three out of the type pinnate all the crack, **5 to feather, ovate-lanceolate, **7 cm long, width of **6 cm, undivided linear lanceolate to back at the end of the long ovoid, long **5 mm, **2 mm wide, apex have little pointed, only a short pulse sparse pubescent; Stem upper leaves gradually simplified. Compound umbels top born or side was born, total bracts **6, linear, 0.5 2.5 cm long; Solar umbrella ***0, before long, long **4 cm; Small umbels have spent ****4; Small total bracts **7, linear, with purple, be soft hair, long **5 mm; Calyx teeth don't development; Petals in white, obovate to the oval, apex have short pointed state protuberant, inside the music; Stamens 5, anthers light green; Style 2, long **3 mm, down the music. Young fruit two CeBian pressure, long **3 mm, about 1 mm wide; Back edges in oil tank **5, CeLeng slot tubing in 2 to 3, the hopson side have tubing **8. Flowering *-August, young fruit period ***0 months.