in our German amorphohallus-forum we have a question
to explain a often seen mark on big T. venosum tubers.
For details see the pictures and contributions in
posts # 96, 93, 97 and 98.
The forum language is German but at the bottom of the
page there is translation fuction implemented.
maybe the link with the translated page works
The questionis, if the mark on picture 2 in post 93
can be related to the peduncle.
(I just notice that some of the pictures are not
displayed automatically in the English translation; you might have to click
the links; sorry.
for instance: http://www.amorphophallus-forum.de/index.php?page=Attachment&attachmentID=1251
There is controversion, because it is assumed that
the old tuber is consumed / replaced totally (post # 96) and in this case
the mark cannot be associated with the lst year's peduncle.
On the other hand there might be an indication that
the offsets go back to buds that might be present on the tuber at the
beginning of the new growing cycle and that those parts of the tuber are
still present at the end of the growing cycle below the mark on the tuber
(in other words: the old tuber is not consumed / replaced totally) - see
post # 97 and picture 1 and 6 in post # 93.
I hope these questions is somehow
Looking forward to any comment !