Polemonium lacustre (Wherry) J.P.Rose & Sytsma
English names not checked: Wikidata's common names were not read for this page.
Photographs not checked
iNaturalist and GBIF media were skipped (not asked) when this page was built. Not asked, or not answered, is not "none": nothing here claims there is none. Why the site says it this way.GBIF's records not checked. GBIF's backbone holds no one accepted species of this name, and a name it holds only as another species' synonym is not taken for this one, so GBIF's records were not asked. So this page has no points on its map, no map marker, no habitat climate, no cultivation sheet and no species of nearest climate; the range is Kew's. Not a statement that none exist. How.
About the genus · Polemonium
Polemonium, commonly called Jacob's ladders or Jacob's-ladders, is a genus of between 25 and 40 species of flowering plants in the family Polemoniaceae, native to cool temperate to arctic regions of the Northern Hemisphere. One species, Polemonium micranthum, also occurs in the southern Andes in South America. Many of the species grow at high altitudes, in mountainous areas. More on Wikipedia ›
Quoted from Wikipedia, "Polemonium", CC BY-SA 4.0.
Cultivation
Climate across the habitat
Natural habitat
Photographs
Related
Similar habitat climate Not checked: GBIF's records were not asked (why, under the name), and the nearest habitat climates are read from the climate they give.
Other Polemonium 19 in the reference
Polemonium boreale Boreal Jacob's-ladder Photo: CC BY, Trevor Van Loon
Polemonium brandegeei Brandegee's Jacob's-ladder Photo: CC BY, Dan Vickers
Polemonium caeruleum Jacob's-ladder Photo: CC BY, amantedarmanin
Polemonium californicum California Jacob's ladder Photo: CC BY, John Brew
Polemonium carneum Oregon polemonium Photo: CC0, author not stated
Polemonium caucasicum Polemoniaceae Photo: CC BY, Yeskendir Satekov
Polemonium chartaceum Mason's sky-pilot Photo: CC BY, Trevor Van Loon Polemonium chinense Chinese Jacob's-ladder 
Polemonium elegans Elegant Jacob's-ladder Photo: CC BY, i like lizards
Polemonium eximium Sierra Nevada Sky Pilot Photo: CC0, author not stated
Polemonium foliosissimum Leafy Jacob's-ladder Photo: CC BY, Daughter Dad
Polemonium occidentale Western Jacob's-ladder Photo: CC0, author not stated all 20 ›Names & registers
Also known as Polemonium occidentale subsp. lacustre; Polemonium occidentale var. lacustre. (WCVP, RBG Kew)
The record
Every figure here is derived from public data by a stated rule and names its source; nothing about this species is written for its page by a person or by AI, apart from the marked, credited quotations. How →
Where this page came from built 2026-10-22
kew.names answeredas of 2026-06-04Kew's entry Polemonium lacustre (Wherry) J.P.Rose & Sytsma (plant_name_id 3307409), read from Kew's names filegbif.species not askedGBIF's backbone holds no one accepted species of this name, and a name it holds only as another species' synonym is not taken for this one, so GBIF's records were not askedgbif.synonyms not askedGBIF's backbone holds no one accepted species of this name, and a name it holds only as another species' synonym is not taken for this one, so GBIF's records were not askedgbif.vernacular not askedGBIF's backbone holds no one accepted species of this name, and a name it holds only as another species' synonym is not taken for this one, so GBIF's records were not askedgbif.occurrences not askedGBIF's backbone holds no one accepted species of this name, and a name it holds only as another species' synonym is not taken for this one, so GBIF's records were not askedwcvp.distribution answeredas of 2026-06-04climate not askedGBIF's backbone holds no one accepted species of this name, and a name it holds only as another species' synonym is not taken for this one, so GBIF's records were not asked, and the habitat climate is read only from themwikidata nothing to reportasked 2026-10-22no item carries Kew's IPNI identifier 77322398-1, POWO 77322398-1wikipedia nothing to reportasked 2026-10-22inat.taxon not askedinat.photos.wild not askedinat.photos.cultivated not askedgbif.media not askedGBIF's backbone holds no one accepted species of this name, and a name it holds only as another species' synonym is not taken for this one, so GBIF's records were not askedcommons nothing to reportasked 2026-10-22openalex not askednot yet asked for this reference; a later fill takes the papers from OpenAlex's snapshotEvery source is recorded as having answered, reported nothing, refused, failed, not been asked, or answered twice where one answer is taken (“not taken: two items answered”), and, for a source asked when this page was built, when: the figures are as the source held them that day; a source read from a file (Kew's World Checklist, a GBIF download) says "as of" the file's day instead; a row carried from an earlier build of the page names that build instead. Only “nothing to report” is ever shown as an absence.