Polygonum achoreum, common names Blake's knotweed, leathery knotweed or striate knotweed,Brako, L., A.Y. Rossman & D.F. Farr. 1995. Scientific and Common Names of 7,000 Vascular Plants in the United States 1–294. is a North American species of plants in the buckwheat family. It is widespread across much of Canada and the northern United States.Biota of North America Program 2014 state-level distribution map Polygonum achoreum is an herb up to 70 cm tall with yellow-green flowers in flat-topped clusters.Flora of North America, Polygonum achoreum S. F. Blake, 1917.Blake, Sydney Fay. 1917. Rhodora 19(226): 232–234 descriptions in English and Latin, commentary in English
No narrative description available for this taxon yet.
A DNA barcode is a short, standardised stretch of genes that works like a fingerprint — enough to tell one species from another. Below is the molecular trace Polygonum achoreum has left across the world's sequence archives.
At a glance
DNA specimens12
Marker genes6
GenBank sequences10
eDNA detections9
Countries2
The DNA barcodea real sequence read deposited for this species
★ the standard DNA barcode for this group — the short region actually read to tell this species apart. The rest are extra genes sequenced along the way.
★matK2★rbcL2★rbcLa★trnL-F★ITS6★ITS2
plant barcodefungal barcode
06Genome at a glanceCCDB
The complete instruction manualPolygonum achoreum carries — its genome. We read it from three angles — how big it is, how the DNA is packed into chromosomes, and how completely it has been sequenced — and explain how to read each value as you go.
Chromosomes & ploidyhow the DNA is packaged
2n is the full chromosome count in a normal body cell; n is a gamete (egg or sperm), which carries half. Ploidy is how many complete chromosome sets each cell holds — 2× (diploid) is typical for animals, while higher levels (polyploidy) are common in plants. Click any value below to see the underlying records and sources.
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Coordinate accuracy88% within 1 km
≤100 m 88≤1 km 4≤10 km 1>10 km 11
104 georeferenced · 18 without coordinates
Open the mapobservation + sensor122
Museum / Voucheredphysical evidence
Backed by a physical specimen — a herbarium sheet, sample or voucher held in a collection. “Vouchered” means supported by material evidence, not just an observation.
Coordinate accuracy41% within 1 km
≤100 m 33≤1 km 141≤10 km 216>10 km 37
427 georeferenced · 388 without coordinates
Open the institutions mapphysical evidence815
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
10Collections & institutions
Holding institutions47 of 73 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
St. Paul, US
93
Madison, US
90
Wuzhou, CN
89
Québec, CA
84
Vancouver, CA
34
Green Bay, US
29
Université Lavallocation not on record
27
Chicago, US
24
Burlington, US
23
Ann Arbor, US
21
Chongqing Museumlocation not on record
18
Bloomington, US
16
Missoula, US
16
Oregon State Universitylocation not on record
16
Chadron, US
16
Bozeman, US
15
Saint Louis, US
14
Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record
12
Montréal, CA
12
University of Alberta Museumslocation not on record
11
Bronx, US
10
Saint John, CA
9
WTUlocation not on record
8
Spearfish, US
7
Victoria, CA
7
University of Wisconsinlocation not on record
7
WINlocation not on record
7
Whitehorse, CA
6
Pullman, US
5
Lincoln, US
5
Acadia Universitylocation not on record
5
Brookings, US
4
Moscow, US
4
University of New Hampshirelocation not on record
3
Paris, FR
3
Montréal, CA
3
Trois-Rivières, CA
3
Toronto, CA
3
Mexico City, MX
2
Pocatello, US
2
Musee des Dinosaures d'Esperaza (Aude)location not on record
2
LDlocation not on record
2
Portland, US
2
Kirksville, US
2
Corvallis, US
2
Emporia, US
2
ASUlocation not on record
2
University of Lethbridgelocation not on record
2
DOI/NPS, Greenbelt Parklocation not on record
2
University of Guelph, OAC Herbariumlocation not on record
2
Anchorage, US
2
Moscow State Universitylocation not on record
2
Claremont, US
2
Research Collection of B. A. Bennettlocation not on record
1
Mexico City, MX
1
DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record
1
McWane Science Centerlocation not on record
1
USFS/BHSClocation not on record
1
Millersville, US
1
Phoenix, US
1
Pittsburg, US
1
LINUlocation not on record
1
San Luis Obispo, US
1
University of Stellenboschlocation not on record
1
Tampa, US
1
Museum of the Rockieslocation not on record
1
Cambridge, US
1
MeiseBGlocation not on record
1
GB
1
Helsinki, FI
1
Flagstaff, US
1
DULlocation not on record
1
Dekalb, US
1
73 institutions · 809 of 815 vouchered records shown · 6 without an institution code
09Environmental DNA9 detections
Where the DNA of Polygonum achoreum was picked up in samples of water, soil or air — nobody saw the organism, only its DNA left behind. A trace is a clue that the species was near, not a confirmed sighting.
Signal
Detections DNA found9
Studies independent surveys1
Countries1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 9 detections have coordinates
Open the map1 country0
Big sagebrush/Idaho Fescue-Sticky Geranium p…Microsite variations in moisture, cleared gr…
How strong is each trace?
DNA read depthRead counts were not reported for this species — the map shows presence only, not how strong each trace was.
Modelled climatemodelled
−15°Ctemperature across detection sites+40°C
Temperature median15.4 °C 15.2–20.2
Seasonal swing summer↔winter26.4 °C
Max temp (day)20.7 °C 20.6–24.4
Min temp (night)11.8 °C 10.7–16.9
Precipitation91.5 mm/mo 83.2–112
Air humidity60.0 % 57.8–60.2
Moisture balance-13.1 mm/mo -48.3–-5.50
Vapour deficit748 Pa 698–964
Wind speed3.40 m/s 3.00–3.80
Cloud cover37.5 % 36.3–45.8
CHELSA 1981–2010, ~9 km grid, at location & month of 3 detection points · median with p10–p90 · reflects where sampling happened, not only the true niche
How to read this: each dot is one detection of this species' DNA in an environmental sample. The confidence meter weighs how many independent studies and places back up the signal — one detection in one study is a hint; many across several studies is solid. Records dated before 2008 (when eDNA methods began) are treated as likely mislabeled and left off the map.
WikipediaWikimedia Foundation2 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility937 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI9 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics12 specimens↗
NCBIUS National Library of Medicinesequences↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
PloiDBPloidy Databasegenome & karyotype
GLoBIGlobal Biotic Interactionsbiotic interactions↗