Arisaema section Tortuosa. Here, also, different types of tubers are encountered, subglobose and medium-sized in A. tortuosum, with many raised buds in the A. yunnanense complex and in A. negishii.

  Figure 36. A. yunnanense. A crown of raised buds surrounds the central shoot like an annulus.
  Figure 33. A. jacquemontii
 
Figure 36. A. yunnanense. A crown of raised buds surrounds the central shoot like an annulus.
     
     

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