What field test strongly indicates an *Allium* by relating to the stem's geometry?
Answer
Being able to roll a blade between fingers and feel four distinct sides, indicating "four corners."
A highly practical field test used by many experienced foragers to quickly confirm membership in the Allium genus relies on tactile feedback regarding stem geometry. If a suspect blade can be easily rolled between the fingers and the user can distinctly feel four separate sides or corners along the stem's length, this strongly suggests the presence of an Allium. This specific physical sensation serves as a powerful indicator, often helping to rule out the round-stemmed toxic look-alikes like Death Camas.
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