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Polemonium caeruleum, known as Jacob's-ladder or Greek valerian, is a hardy perennial flowering plant. The plant produces cup-shaped, blue or white flowers.
Wikipedia contributors, CC BY-SA 4.0 — Polemonium caeruleum
Polemonium caeruleum, known as Jacob's-ladder or Greek valerian, is a hardy perennial flowering plant. The plant produces cup-shaped, blue or white flowers.
Wikipedia contributors, CC BY-SA 4.0 — Polemonium caeruleum
