Polemonium caeruleum L.

Jacob's Ladder

Perennial herb to about 1 m tall. Leaves to 30 cm or so long. Leaflets 19-27, lanceolate to elliptic, the terminal leaflet free from the others. Flower cluster open. Flowers 1-2.5 cm wide, blue or rarely white; spring to summer.

N America, Eurasia

Source: Spencer, R. (2002). Polemoniaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 4. Flowering plants. Dicotyledons. Part 3. The identification of garden and cultivated plants. University of New South Wales Press.

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Distribution map

Polemonium caeruleum 'Album'

Flowers white. [P. caeruleum var. lacteum (Lehm.) Benth.]

kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Asteranae
order      Ericales
family       Polemoniaceae
genus        Polemonium L.