Name: Marilyn, aka "Poly" South San Francisco Bay Area (Zone 9b) "The mountains are calling..."
I would think "rodent" rather than slugs or snails. Not that they don't do damage, but I've got both here and I've never seen damage like THAT from them...they tend to go after the blooms instead of the stalk.
Evaluating an iris seedling, hopefully for rebloom
