The pole is 2-7 meters high and 1-5.5 cm in diameter; the internodes are generally 18-20 cm long, and the longest can reach 25 cm. The length of the internodes at the base of the pole is 6-10 cm, cylindrical or sometimes internodes at the base. Slightly square, glabrous, without white powder, the middle pole wall thickness is 5-8 mm; usually branched from the 12th node and above.
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