Antennaria howellii, l'Antennaire de Howell, est une espèce de plantes à fleurs de la famille des Asteraceae, endémique du Nord de l'Amérique du Nord de l'Est de l'Alaska jusqu'à Terre-Neuve et de la Californie, du Colorado et de la Caroline du Nord. Cette espèce est dédiée à Thomas Jefferson Howell, botaniste américain de la deuxième moitié du XIXe siècle. Cette vivace à feuilles persistantes se propage par ses stolons. Ses feuilles, formant une rosette basale, mesurent 2-4 cm de long et 6-12 mm large. Elles sont spatulées, d'un vert clair dessus et d'un blanc cotonneux dessous. Les capitules apparaissent en mai, sur une hampe florale de 15-35 cm. Elle se plait au sein des pinèdes montagnardes. Plusieurs sous-espèces sont notables : - Antennaria howellii subsp. canadensis - Antennaria howellii subsp. howellii - Antennaria howellii subsp. neodioica - Antennaria howellii subsp. petaloidea
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 Antennaria howellii has left across the world's sequence archives.
At a glance
DNA specimens10
Marker genes5
GenBank sequences10
eDNA detections10
Countries2
The DNA barcodea real sequence read deposited for this species
Antennaria howellii voucher CCDB-18321-H12 internal transcribed spacer 2 and large subunit ribosomal RNA gene, partial sequence
Marker genes sequenced
★ 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.
★matK3★rbcL4★rbcLa★ITS3★ITS2
plant barcodefungal barcode
06Genome at a glanceCCDB · GoaT · TreeOfSex
The complete instruction manualAntennaria howellii 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.
Chromosome-count records — grouped by value · 2n = full set, n = gamete · click a value for sources & references
2n 846×CCDB · ipcn-api-dl · TreeOfSex · plant
CCDB · ipcn-api-dl
CCDB · ipcn-api-dl — Bayer, R. J. 1984. Chromosome numbers and taxonomic notes for North American Species of Antennaria (Asteraceae: Inuleae). Syst. Bot. 9: 74–83.
CCDB · ipcn-api-dl — Chmielewski, J. G. 2006. Chromosome numbers for western and arctic North American species of Antennaria (Asteraceae: Gnaphalieae). Sida 22(1): 561–563.
CCDB · ipcn-api-dl — Bayer, R. J. & G. L. STEBBINS. 1987. Chromosome numbers, patterns of distribution, and apomixis in Antennaria (Asteraceae: Inuleae). Syst. Bot. 12: 305–319.
CCDB · ipcn-api-dl — Chmielewski, J. G. 1995. Chromosome number determinations for Newfoundland species of Antennaria Gaertner (Asteraceae: Inuleae). Rhodora 97: 1–8.
CCDB · ipcn-api-dl — Bayer, R. J. & G. L. STEBBINS. 1987. Chromosome numbers, patterns of distribution, and apomixis in Antennaria (Asteraceae: Inuleae). Syst. Bot. 12: 305–319.
2n 981×CCDB · ipcn-api-dl
CCDB · ipcn-api-dl — Love, A. & D. Love. 1980b. In Chromosome number reports LXIX. Taxon 29: 707–709.
2n 1121×CCDB · ipcn-api-dl
CCDB · ipcn-api-dl — Chmielewski, J. G. & C. C. Chinnappa. 1988. The genus Antennaria (Asteraceae: Inuleae) in western North America. II. Additional chromosome counts. Rhodora 90: 133–137.
2n 1401×CCDB · ipcn-api-dl
CCDB · ipcn-api-dl — Bayer, R. J. & G. L. STEBBINS. 1987. Chromosome numbers, patterns of distribution, and apomixis in Antennaria (Asteraceae: Inuleae). Syst. Bot. 12: 305–319.
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 accuracy87% within 1 km
≤100 m 738≤1 km 83≤10 km 43>10 km 83
947 georeferenced · 309 without coordinates
Open the mapobservation + sensor1 256
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 38≤1 km 41≤10 km 101>10 km 12
192 georeferenced · 261 without coordinates
Open the institutions mapphysical evidence453
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 60 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Chongqing Museumlocation not on record
75
Saint John, CA
64
Vancouver, CA
48
St. Paul, US
26
Bozeman, US
19
Ann Arbor, US
18
Green Bay, US
16
Toronto, CA
14
Madison, US
13
Arcata, US
12
University of Alberta Museumslocation not on record
11
Université Lavallocation not on record
10
Stockholm, SE
9
WTUlocation not on record
9
Philadelphia, US
8
Bangkok, TH
7
Pullman, US
5
Millersville, US
5
Spearfish, US
5
University of New Hampshirelocation not on record
4
Cheney, US
4
Missoula, US
4
Québec, CA
4
University of Stellenboschlocation not on record
3
Victoria, CA
3
McWane Science Centerlocation not on record
3
Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record
3
Research Collection of B. A. Bennettlocation not on record
3
Logan, US
2
Whitewater, US
2
Bronx, US
2
Caldwell, US
2
DOI/NPS, Colonial National Historical Parklocation not on record
2
College Park, US
2
SEFlocation not on record
2
Burlington, US
2
Corvallis, US
2
Dekalb, US
2
Beijing, CN
2
Boise, US
1
Mount Pleasant, US
1
Lincoln, US
1
Durham, US
1
Moscow, US
1
University of British Columbialocation not on record
1
Kew, GB
1
Pocatello, US
1
USFS/BHSClocation not on record
1
Philadelphia, US
1
Portland, US
1
WINlocation not on record
1
DOI/NPS, Greenbelt Parklocation not on record
1
Provo, US
1
Montréal, CA
1
Whitehorse, CA
1
McGill University, Herbariumlocation not on record
1
Montréal, CA
1
Oskarshamn, SE
1
State University of New York, College at Oneontalocation not on record
1
Chapel Hill, US
1
60 institutions · 448 of 453 vouchered records shown · 5 without an institution code
09Environmental DNA10 detections
Where the DNA of Antennaria howellii 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 found10
Studies independent surveys1
Countries2
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 10 detections have coordinates
Open the map2 countries0
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 median13.7 °C 7.70–17.5
Seasonal swing summer↔winter30.4 °C
Max temp (day)19.1 °C 11.4–23.7
Min temp (night)8.20 °C 2.90–11.9
Precipitation89.4 mm/mo 52.2–103
Air humidity55.3 % 53.7–60.1
Moisture balance-36.3 mm/mo -82.8–3.20
Vapour deficit703 Pa 427–893
Wind speed3.30 m/s 1.90–4.20
Cloud cover39.4 % 33.9–51.5
CHELSA 1981–2010, ~9 km grid, at location & month of 9 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.
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility1 709 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI10 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics10 specimens↗
NCBIUS National Library of Medicinesequences↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
GoaTGenomes on a Tree · Sangergenome & karyotype↗
PloiDBPloidy Databasegenome & karyotype
Tree of SexTree of Sex Consortiumgenome & karyotype↗
GLoBIGlobal Biotic Interactionsbiotic interactions↗