Flowering Trees & Shrubs Codexery

Populus trichocarpa

A model tree species with cottony seeds and invasive roots.

Last updated

The native range covers large sections of western North America, from southeast Alaska to southern California and northern Baja California.[1] Old trees develop thick, deeply fissured bark that is grey and covered with lenticels.[2] Male and female catkins occur on separate trees, making P. trichocarpa normally dioecious.[3] Around age 10, the species begins to flower.[3]

Black cottonwood tolerates flooding well but has low drought tolerance.[4]

Scientific classification

  1. CladeTracheophytes
  2. CladeAngiosperms
  3. CladeEudicots
  4. CladeRosids
  5. OrderMalpighiales
  6. FamilySalicaceae
  7. GenusPopulus
  8. GenusPopulus
  9. SpeciesPopulus trichocarpa

Named by Torr. & A.Gray ex. Hook.

Close relatives

Other species of Populus with a Codexery entry.

Sources: Wikipedia taxobox: Populus trichocarpa (CC BY-SA 4.0)

Conservation status

Least Concern (LC)

  1. LC▲ this species
  2. NT
  3. VU
  4. EN
  5. CR
  6. EW
  7. EX
Population trend
Not held in our sources — see the assessment

Source: IUCN Red List assessment · GBIF copy of the Red List category

Where the populus trichocarpa has been recorded

Where the populus trichocarpa has been recorded13 mapped locations from 33,086 GBIF occurrence records; marked places: Willamette Mission State ParkWillamette Mission State Park

Each dot is a place where the species has been observed and reported (33,086 records, half-degree grid) — not a modelled range. 221 inland records left out (institution coordinates).

Map: drawn by Codexery. Data: GBIF occurrence search (records CC0 / CC BY) · Natural Earth basemap (public domain) · place coordinates: Wikipedia (CC BY-SA 4.0)

What the specialist sources record

The Oregon Travel Experience account records a giant black cottonwood at Willamette Mission State Park, standing approximately 155 ft tall with a circumference of 26 ft 3 in and an age of about 270 years.[5] The American Forests Champion Trees Registry notes that this species ranks 3rd in poplar species in their registry.[6][7] The GBIF Backbone Taxonomy accepts Populus trichocarpa as a species within the family Salicaceae, holding 35,858 occurrence records.[8] A 2016 study published in PLOS provided the first direct evidence that wild P. trichocarpa fixes nitrogen.[9]

The Open Library record for ISBN 9781680513295 lists "Northwest Trees" as published by Mountaineers Books on Aug 12, 2020.[10] The Open Library record for ISBN 9780295952581 lists "Ethnobotany of western Washington" as published by University of Washington Press in 1973.[11]

References

  1. Wikipedia, "Populus trichocarpa" (CC BY-SA 4.0), which cites: Arno, "Northwest Trees: Identifying & Understanding the Region's Native Trees", Mountaineers Books, 2020, p. 196–202; Holmgren, "Intermountain Flora : Vascular Plants of the Intermountain West, U.S.A.", New York Botanical Garden, 2005, p. 126; Eckenwalder, "Populus trichocarpa", Flora of North America, 5 November 2020, p. 13 (we also read that source) en.wikipedia.org
  2. Wikipedia, "Populus trichocarpa" (CC BY-SA 4.0), which cites: Ewing, Susan. The Great Alaska Nature Factbook. Portland: Alaska Northwest Books, 1996. (original not read by us) en.wikipedia.org
  3. Wikipedia, "Populus trichocarpa" (CC BY-SA 4.0), which cites: "Black Cottonwood", Stagrallergymap.com; "That white cottony stuff blowing around in the air is not snow... - Family Allergy Asthma & Sinus Care" (original not read by us) en.wikipedia.org
  4. Wikipedia, "Populus trichocarpa" (CC BY-SA 4.0) en.wikipedia.org
  5. "Willamette Mission Cottonwood - Oregon Travel Experience", Ortravelexperience.com. facts only, no text reused. ortravelexperience.com
  6. Wikipedia, "Populus trichocarpa" (CC BY-SA 4.0), which cites: "Champion Trees Registry", American Forests; Forbes 2006 (we also read that source) en.wikipedia.org
  7. "Champion Trees Registry", American Forests. facts only, no text reused. americanforests.org
  8. GBIF Backbone Taxonomy and occurrence index, Populus trichocarpa (taxon key 6362904). CC BY 4.0 (backbone); counts are facts. gbif.org
  9. Wikipedia, "Populus trichocarpa" (CC BY-SA 4.0), which cites: Doty, S. L., Sher, A. W., Fleck, N. D., Khorasani, M., Bumgarner, R. E., Khan, Z., ... & DeLuca, T. H. (2016). Variable nitrogen fixation in wild Populus. PLOS (original not read by us) en.wikipedia.org
  10. Open Library record, ISBN 9781680513295 ("Northwest Trees"). CC0 (metadata); book content not read. openlibrary.org
  11. Open Library record, ISBN 9780295952581 ("Ethnobotany of western Washington"). CC0 (metadata); book content not read. openlibrary.org

Each numbered sentence above was checked against the source it cites before publication. Sentences citing Wikipedia adapt text from the English Wikipedia article Populus trichocarpa (contributors), used under CC BY-SA 4.0; this entry is available under the same licence. Other sources were used for facts only; no text or images are copied from them.

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Sources

Compiled from Wikipedia and the sources listed below. Text from Wikipedia is available under CC BY-SA 4.0; this entry is adapted from it.

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