polemonium caeruleum การใช้

• In and around the United Kingdom, for example, Greek valerian ( " Polemonium caeruleum " ), which are peculiar to the Pennines.
• I admire Jacob's ladder ( Polemonium caeruleum ) more for its glossy, fern-like leaves now than I did for its sprays of blue flowers in June.
• The Monyash end of Lathkill Dale is well known for the flower Jacob's ladder ( " Polemonium caeruleum " ), which is common in gardens but rare in the wild.