A corm, composed of dense stem tissue and wrapped in papery leaf bases, is the underground storage structure of some plants. This is the corm of Arisaema atrorubens (Woodland Jack-in-the-pulpit) as it appeared to me after the fruit had ripened.
All parts of Jack-in-the-pulpit contain calcium oxalate crystals. If ingested raw, these crystals are capable of mechanically injuring your mouth, throat and kidneys. To safely eat the corm, as flour or like chips, it must be dried thoroughly or sufficiently cooked.
As a medicinal herb, the raw corm can be pounded into a poultice. This irritating, yet healing poultice can then be applied to rheumatic joints.
As an enthusiastic student of the natural world, I share my explorations of all that is wild with all of you — teacher, parent, and child!