Common name: Jacob's-ladder
Scientific name: Polemonium caeruleum 花荵
Genus: Polemonium 花荵屬
Family: Polemoniaceae 花荵科、翠梅科, Jacob's-ladder or phlox family
Remarks*:
Origin: native in Britain. Neophyte (established after 1500 AD) in Ireland.
Date: 21st May & 8th June (flowering)
44 The habitat that Jacob's-ladder is found.
37 A tall, erect, rhizomatous perennial, can reach to 1m. Leaves alternate.
33 Leaves 10-40 cm, pinnate. (The shape looks like a ladder, that is why the name Jacob's-ladder come from.)
34 The underside of the leaves.
217 The flower buds.
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214 Later views of flowers, showing 5 sepals.
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223 Flowers 2-3 cm across, blue; 5 petals; 5 stamens, much longer than corolla.
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