Blue Jacob's Ladder

Polemonium caeruleum

Summary 1

Polemonium caeruleum, known as Jacob's-ladder or Greek valerian, is a hardy perennial flowering plant. The plant produces cup-shaped, lavender-coloured or white flowers. It is native to temperate regions of Europe.

Sources and Credits

  1. (c) Wikipedia, some rights reserved (CC BY-SA), https://en.wikipedia.org/wiki/Polemonium_caeruleum

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