Identifying a Non-Flowering Perennial with Arrow-Shaped Leaves

Mystery Plant: Arum Family?

A gardener has a perennial with 8-inch green stems, arrow-shaped leaves 6–9 inches long with small blotches, no flowers. The plant may be an Arum species (like jack-in-the-pulpit). Key identification features:

• Does it die back completely in winter?
• Does it produce a hooded spathe (cobra-like flower) in spring?
• Location helps narrow species.

If it's Arum italicum, it goes dormant in summer and reappears in fall. Provide location for precise ID.