Krigia biflora, also known as two-flower cynthia or two-flower dwarf dandelion, is a species of plant in the family Asteraceae. It is native to North America, where it is found in central Canada (Manitoba and Ontario) and in the eastern, central, and southwestern United States.United States Department of Agriculture plants profileBiota of North America Program 2014 county distribution map This species is rare in Connecticut, and it is listed as a species of special concern.Connecticut Botanical Society Krigia biflora is an erect perennial growing tall. One plant can have 20 or more flower heads, very often two per flower stalk, each head with 25–60 yellow to orange-yellow ray flowers about across. There are no disc flowers. It can be an aggressively spreading plant. It grows in a variety of habitats and soils and blooms in late spring to late summer. The name of the plant consists of two words: Krigia for David Krieg, the German physician who first collected this plant in Maryland; and biflora, meaning two-flowered.Wisconsin PlantsFlora of North America, Krigia biflora (Walter) S. F. Blake, 1915. Orange dwarfdandelion Its habitats include streams, meadows, and moist prairies.
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 Krigia biflora has left across the world's sequence archives.
At a glance
DNA specimens12
Marker genes5
GenBank sequences10
eDNA detections7
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★rbcL4★rbcLa★ITS4★ITS2
plant barcodefungal barcode
06Genome at a glanceCCDB
The complete instruction manualKrigia biflora 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.
Genome sizehow big the whole instruction manual is
Genome size2 611 260 000 bp
Measured in base pairs (bp) — the individual letters of DNA (human ≈ 3.2 Gb, a bacterium a few million). The chart places this genome on a logarithmic scale — each step to the right is ten times bigger — among reference organisms. Across species a bigger genome loosely tracks with larger cells, slower growth and lower-energy lifestyles (powered flight favours small genomes) — yet it does not imply more genes or a more advanced organism (the long-standing C-value paradox).
BACTERIUM Carsonella ruddii0.00016 Gb
FUNGUS0.04 Gb
INSECT0.25 Gb
THIS GENOME Krigia biflora2.61 Gb
HUMAN3.2 Gb
WHEAT17 Gb
FERN Tmesipteris160.45 Gb
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.
Chromosome-count records — grouped by value · 2n = full set, n = gamete · click a value for sources & references
2n 105×CCDB · ipcn-api-dl · CCDB · book-fedorov
CCDB · ipcn-api-dl — Kim, K. J. & B. L. Turner. 1992. Systematic overview of Krigia (Asteraceae---Lactuceae). Brittonia 44(2): 173–198.
CCDB · ipcn-api-dl — Morton, J. K. 1981. Chromosome numbers in Compositae from Canada and the U.S.A. Bot. J. Linn. Soc. 82: 357–368.
CCDB · ipcn-api-dl — Chinnappa, C. C. 1981. Cytological studies in Krigia (Asteraceae). Canad. J. Genet. Cytol. 23: 67 1 –678.
CCDB · ipcn-api-dl — Harriman, N. A. 1975. In IOPB chromosome number reports XLVIII. Taxon 24: 367–372.
CCDB · book-fedorov — Kawano 1965a
2n 201×CCDB · ipcn-api-dl
CCDB · ipcn-api-dl — Kim, K. J. & B. L. Turner. 1992. Systematic overview of Krigia (Asteraceae---Lactuceae). Brittonia 44(2): 173–198.
n 51×CCDB · ipcn-api-dl
CCDB · ipcn-api-dl — Tomb, A. S., K. L. Chambers, D. W. KYHOS, A. M. Powell & P. H. RAVEN. 1978. Chromosome numbers in the Compositae XIV. Lactuceae. Amer. J. Bot. 65: 717–721.
Ploidy records — measured levels and diploid/polyploid inferences · click for sources
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Coordinate accuracy81% within 1 km
≤100 m 2 015≤1 km 451≤10 km 186>10 km 401
3 053 georeferenced · 644 without coordinates
Open the mapobservation + sensor3 697
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 accuracy42% within 1 km
≤100 m 47≤1 km 288≤10 km 408>10 km 51
794 georeferenced · 242 without coordinates
Open the institutions mapphysical evidence1 036
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 institutions65 of 91 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Philadelphia, US
234
Chongqing Museumlocation not on record
115
St. Paul, US
111
Bloomington, US
97
Ann Arbor, US
62
Madison, US
49
Allentown, US
19
Bronx, US
17
Dekalb, US
17
Tuscaloosa, US
17
New Haven, US
16
Bangkok, TH
15
Knoxville, US
15
WINlocation not on record
12
Emporia, US
10
Green Bay, US
9
Chicago, US
8
Jackson, US
8
University of Stellenboschlocation not on record
8
Albuquerque, US
8
US
7
New Brunswick, US
7
DOI/NPS, Colonial National Historical Parklocation not on record
6
Flagstaff, US
6
Staten Island, US
6
Philadelphia, US
5
Saint Louis, US
5
Wuzhou, CN
5
Waverly, US
5
Jurica-Suchy Nature Museumlocation not on record
5
Fayetteville, US
5
Davenport, US
5
Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record
5
Chapel Hill, US
5
AUAlocation not on record
4
Bureau of Land Management, Caliente Field Officelocation not on record
4
University of Tennessee at Chattanoogalocation not on record
4
Austin, US
3
DOI/NPS, Greenbelt Parklocation not on record
3
Mount Berry, US
3
Museum of the Rockieslocation not on record
3
EL PASO, US
3
Pittsburg, US
3
Mohonk Preservelocation not on record
3
University of Guelph, OAC Herbariumlocation not on record
3
Science Museum of Minnesotalocation not on record
3
San Angelo, US
3
Whitewater, US
3
University of Alberta Museumslocation not on record
2
Toronto, CA
2
Millersville, US
2
McWane Science Centerlocation not on record
2
BAYLUlocation not on record
2
Lubbock, US
2
Denver, US
2
Görlitz, DE
2
Burlington, US
2
Musee des Dinosaures d'Esperaza (Aude)location not on record
2
Conway, US
2
Tennessee Technological Universitylocation not on record
2
GAlocation not on record
2
Montréal, CA
2
Baltimore, US
1
Cincinnati, US
1
Fargo, US
1
Beijing, CN
1
Williamsburg, US
1
Johnson City, US
1
Pullman, US
1
Little Rock, US
1
Western Carolina Universitylocation not on record
1
Jena Microbial Resource Collectionlocation not on record
1
Due West, US
1
Decorah, US
1
Norfolk, US
1
University of North Carolina at Pembrokelocation not on record
1
Wlocation not on record
1
Richmond, US
1
San Luis Obispo, US
1
University of Southern Mississippilocation not on record
1
Edmonton, CA
1
China Agricultural Universitylocation not on record
1
Provo, US
1
Moscow, US
1
Elikins, US
1
Mississippi State, US
1
Northridge, US
1
Columbia, US
1
Cheney, US
1
US
1
Dover, US
1
91 institutions · 1 026 of 1 036 vouchered records shown · 10 without an institution code
09Environmental DNA7 detections
Where the DNA of Krigia biflora 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 found7
Studies independent surveys1
Countries1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 7 detections have coordinates
Open the map1 country0
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 median-3.20 °C -3.50–13.8
Seasonal swing summer↔winter27.4 °C
Max temp (day)-0.2 °C -0.5–18.8
Min temp (night)-5.10 °C -5.90–9.70
Precipitation74.9 mm/mo 66.5–79.4
Air humidity63.2 % 58.2–63.3
Moisture balance29.5 mm/mo -49.9–36.9
Vapour deficit180 Pa 177–750
Wind speed4.30 m/s 4.00–7.30
Cloud cover51.3 % 43.2–53.3
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 Facility4 734 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI7 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↗