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Washington polemonium
Polemonium pectinatum
Polemonium pectinatum is a species of flowering plant in the phlox family known by the common names Washington Jacob's-ladder and Washington polemonium. It is endemic to the state of Washington in the United States, where it occurs in the Columbia Basin, including the Channeled Scablands and the Palouse.
From the article Polemonium pectinatum on Wikipedia (CC BY-SA), quoted section by section
Description
This perennial herb grows from a taproot, producing a cluster of stems up to 80 centimetres (31 in) tall. The alternately arranged leaves are each made up of several linear-shaped leaflets up to 5 centimetres (2.0 in) long. The hairy, glandular inflorescence is an open array of white or lavender flowers with five corolla lobes. Flowering occurs in May through July.
Species. This species occurs in riparian habitat and seasonally moist depressions and bottomlands. Other species in the habitat may include Crataegus douglasii, Amelanchier alnifolia, Elymus cinereus, Rosa woodsii, and Ribes aureum. There are about 26 occurrences of this species, divided into 6 or 7 populations. The plant's total distribution covers less than 2,500 acres (1,000 ha). Threats to the species include overgrazing, though it can tolerate some grazing activity, being adapted to disturbance. Land use conversion is a threat, for example, the conversion of the Palouse grasslands to agriculture. Other threats include alterations in hydrology, herbicides, and introduced species.
== References ==
Where it lives
Recorded sightings
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geo-referenced records in GBIF, from museums, herbaria and field observers.
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In the stacks
Searching the stacks…
Every page naming Polemonium pectinatum in the Biodiversity Heritage Library →
This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 167164.