Epilobium densiflorum is a species of willowherb known by the common names denseflower willowherb, dense spike-primrose or dense boisduvalia. It is native to western North America from British Columbia to Baja California, where it is found in a variety of habitats. This is an erect annual often exceeding a meter in height with fuzzy green foliage. The pointed leaves are up to 8 centimeters long near the base of the plant, and the upper leaves are generally more hairy than the lower. The stem may branch or not. The top of the stem is occupied by a hairy, leafy, densely flowered inflorescence. Each flower has four deeply notched petals in shades of pinkish purple to nearly white with dark veining, each about a centimeter long. The fruit is a cylindrical capsule about a centimeter long.
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 Epilobium densiflorum has left across the world's sequence archives.
At a glance
DNA specimens9
Marker genes4
GenBank sequences7
eDNA detections5
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.
★rbcL3★rbcLa★ITS4★ITS2
plant barcodefungal barcode
06Genome at a glanceCCDB
The complete instruction manualEpilobium densiflorum 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.
Chromosomes2n = 20 n = 10
Chromosome-count records — grouped by value · 2n = full set, n = gamete · click a value for sources & references
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Coordinate accuracy94% within 1 km
≤100 m 493≤1 km 116≤10 km 19>10 km 21
649 georeferenced · 172 without coordinates
Open the mapobservation + sensor821
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 accuracy63% within 1 km
≤100 m 65≤1 km 347≤10 km 230>10 km 7
649 georeferenced · 639 without coordinates
Open the institutions mapphysical evidence1 288
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 institutions43 of 62 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Corvallis, US
103
DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record
101
Riverside, US
96
Pullman, US
90
Claremont, US
86
San Diego, US
74
Davis, US
67
Bronx, US
48
Santa Barbara, US
42
Caldwell, US
37
Canadian Department of Agriculturelocation not on record
34
Arcata, US
34
San Luis Obispo, US
32
Provo, US
16
Ashland, US
15
CASlocation not on record
15
US
14
Logan, US
13
San Jose, US
11
University of Stellenboschlocation not on record
11
Boise, US
10
Moscow, US
9
WTUlocation not on record
9
Portland, US
8
ASUlocation not on record
7
VALElocation not on record
7
Victoria, CA
6
Flagstaff, US
6
Vancouver, CA
6
IDElocation not on record
6
Santa Cruz, US
6
Bloomington, US
5
Saint Louis, US
4
Severin-McDaniel Insect Collectionlocation not on record
4
EL PASO, US
4
Pocatello, US
4
University of British Columbia, Herbariumlocation not on record
3
Musee des Dinosaures d'Esperaza (Aude)location not on record
2
Northridge, US
2
Emporia, US
2
Phoenix, US
2
Macomb, US
2
Henderson, US
2
Eastern Nevada Landscape Coalitionlocation not on record
1
Wuzhou, CN
1
San Diego Natural History Museum, Herbariumlocation not on record
1
Austin, US
1
TFBLMlocation not on record
1
Wellington, NZ
1
Pittsburg, US
1
Burlington, US
1
STNFlocation not on record
1
Missoula, US
1
Turku, FI
1
KNFYlocation not on record
1
Chongqing Museumlocation not on record
1
Long Beach, US
1
Irvine, US
1
KNFHClocation not on record
1
Arizona State University Biocollectionslocation not on record
1
Turlock, US
1
St. Paul, US
1
62 institutions · 1 074 of 1 288 vouchered records shown · 214 without an institution code
09Environmental DNA5 detections
Where the DNA of Epilobium densiflorum 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 found5
Studies independent surveys1
Countries2
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 5 detections have coordinates
Open the map2 countries0
edge of pools and drying wet places in meado…Meadowon dry gravel roadside (N side), with Gnapha…Springy places along road
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 median18.7 °C 17.4–20.8
Seasonal swing summer↔winter14.9 °C
Max temp (day)23.5 °C 23.0–28.2
Min temp (night)14.7 °C 12.9–14.8
Precipitation28.9 mm/mo 14.6–29.1
Air humidity56.5 % 44.0–56.7
Moisture balance-117 mm/mo -167–-116
Vapour deficit937 Pa 863–1,399
Wind speed1.90 m/s 1.80–2.20
Cloud cover31.7 % 20.4–31.7
CHELSA 1981–2010, ~9 km grid, at location & month of 4 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 Facility2 109 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI5 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics9 specimens↗
NCBIUS National Library of Medicinesequences↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
GLoBIGlobal Biotic Interactionsbiotic interactions↗