Question: Cross sections of "button weed" from West Branch Pond , Maine. Called eriocaulon septangulare . I see six partions and …
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Question
Cross sections of "button weed" from West Branch Pond , Maine. Called eriocaulon septangulare . I see six partions and the central core on cross section. What feature is counted to get the seven ( in septangulare) ? Photos one plain and one stained. thanks Bob
Answer
Dear 291shadow, Eriocaulon aquaticum (the current accepted name for E. septangulare, which is an invalid name) can have from 5-7 ridges on its scapes (i.e., flowering stems). In other words, the number 7 is not magic here and you don't need to observe that number to have this species. If you have any questions, don't hesitate to contact me again. Best wishes.
