Stem erect or slightly curved in upper part, laxly branched, base 5-7 mm in diam., nodes swollen in lower part, with few supporting roots and many fibrous roots.

 
  • 茎直立或稍弯曲在上半部分,稀松的分枝,基部直径的5-7毫米,在下半部分节膨胀,具很少支持根和很多须根里的。
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