Eurybia divaricata (formerly Aster divaricatus), commonly known as the white wood aster, is an herbaceous plant native to eastern North America. It occurs in the eastern United States, primarily in the Appalachian Mountains, though it is also present in southeastern Canada, but only in about 25 populations in the provinces of Ontario and Quebec. In the U.S. it is abundant and common, but in Canada it is considered threatened due to its restricted distribution. It can be found in dry open woods as well as along wood-edges and clearings. The species is distinguished by its flower heads that have yellow centers and white rays that are arranged in flat-topped corymbiform arrays, emerging in the late summer through fall. Other distinguishing characteristics include its serpentine stems and sharply serrated narrow heart-shaped leaves. The white wood aster is sometimes used in cultivation in both North America and Europe due to it being quite tough and for its showy flowers.
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 Eurybia divaricata has left across the world's sequence archives.
At a glance
DNA specimens12
Marker genes3
eDNA detections8
Countries1
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.
★rbcL★rbcLa★ITS2
plant barcodefungal barcode
06Genome at a glanceCCDB
The complete instruction manualEurybia divaricata 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 187×CCDB · ipcn-api-dl · CCDB · eflora
CCDB · ipcn-api-dl — Semple, J. C. 1985. Chromosome number determinations in fam. Compositae tribe Astereae. Rhodora 87: 517–527.
CCDB · ipcn-api-dl — Semple, J. C. 1983. Range expansion of Heterotheca camporum (Compositae: Asteraceae) in the southeastern United States. Brittonia 35(2): 140–146.
CCDB · ipcn-api-dl — Semple, J. C., J. G. Chmielewski & M. E. Lane. 1989. Chromosome number determinations in fam. Compositae, tribe Astereae. III. Additional counts and comments on generic limits and ancestral base numbers. Rhodora 91: 296–314.
CCDB · ipcn-api-dl — Lamboy, W. F. 1992. The taxonomic status and probable origin of Aster chlorolepis, a southern Appalachian endemic. Castanea 57(1): 52–65.
CCDB · ipcn-api-dl — Semple, J. C., J. Zhang & C. Xiang. 1993. Chromosome number determinations in fam. Compositae, tribe Astereae. V. Eastern North American taxa. Rhodora 95: 234–253.
CCDB · ipcn-api-dl — Semple, J. C. & L. Brouillet. 1980. Chromosome numbers and satellite chromosome morphology in Aster and Lasallea. Amer. J. Bot. 67(7): 1027–1039.
CCDB · ipcn-api-dl — Hill, L. M. 1983. Chromosomal typification of Sisyrinchium bermudiana L. (Iridaceae). Rhodora 85: 257–258.
CCDB · ipcn-api-dl — Semple, J. C. & L. Brouillet. 1980. Chromosome numbers and satellite chromosome morphology in Aster and Lasallea. Amer. J. Bot. 67(7): 1027–1039.
CCDB · book-ipcn73-74 — ANDERSON, L.C., D.W. KYHOS, T. MOSQUIN, A.M. POWEL~, & P.H. RAVEN. 1974. Chromosome numbers in Compositae. IX Haplopappus and other Astereae. Amer. J. Bot. 61: 665-671.
CCDB · Cave1963 — Van Fassen 1963
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 accuracy91% within 1 km
≤100 m 5 003≤1 km 965≤10 km 312>10 km 298
6 578 georeferenced · 1 206 without coordinates
Open the mapobservation + sensor7 784
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 accuracy36% within 1 km
≤100 m 98≤1 km 315≤10 km 620>10 km 130
1 163 georeferenced · 764 without coordinates
Open the institutions mapphysical evidence1 927
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
Coordinate accuracy100% within 1 km
≤1 km 1
1 georeferenced
Open the mapnot free-living1
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 institutions58 of 81 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
476
Bronx, US
343
New Haven, US
129
University of Stellenboschlocation not on record
96
Bangkok, TH
75
Chongqing Museumlocation not on record
67
University of New Hampshirelocation not on record
64
Burlington, US
50
Wuzhou, CN
31
College Park, US
28
Morgantown, US
23
New Brunswick, US
21
Montréal, CA
20
Western Carolina Universitylocation not on record
20
Bloomington, US
18
Knoxville, US
18
Richmond, US
16
Chapel Hill, US
15
Millersville, US
15
Hudson, US
11
Appalachian State Universitylocation not on record
10
Philadelphia, US
10
University of Tennessee at Chattanoogalocation not on record
9
Johnson City, US
9
Tuscaloosa, US
9
Norfolk, US
8
Asheville, US
8
SLU Artdatabankenlocation not on record
8
Fredericksburg, US
7
Columbia, US
7
Clemson, US
6
LDlocation not on record
6
Québec, CA
6
GAlocation not on record
5
Tennessee Technological Universitylocation not on record
4
Pullman, US
4
Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record
4
Harrisonburg, US
4
Provo, US
4
Oskarshamn, SE
4
Williamsburg, US
3
EL PASO, US
3
Tempe, US
3
Fairfax, US
3
Maryland Department of Natural Resourceslocation not on record
3
Durham, US
3
Northridge, US
2
Dekalb, US
2
BRNUlocation not on record
2
Barcelona, ES
2
Denver, US
2
DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record
2
San Luis Obispo, US
2
Canadian Department of Agriculturelocation not on record
2
Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record
1
Riverside, US
1
Mississippi State, US
1
CJBGlocation not on record
1
Whitehorse, CA
1
Vancouver, CA
1
Saint Louis, US
1
Oswego, US
1
Fort Worth, US
1
Pittsburg, US
1
West Virginia Wesleyan Collegelocation not on record
1
Little Rock, US
1
San Angelo, US
1
Saint John, CA
1
Valdosta State Universitylocation not on record
1
AUAlocation not on record
1
Dover, US
1
Chadron, US
1
Claremont, US
1
State University of New York, College at Oneontalocation not on record
1
Jena Microbial Resource Collectionlocation not on record
1
Phoenix, US
1
Lord Fairfax Community Collegelocation not on record
1
Boise, US
1
Flagstaff, US
1
Trondheim, NO
1
Cambridge, US
1
81 institutions · 1 729 of 1 927 vouchered records shown · 198 without an institution code
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
09Environmental DNA8 detections
Where the DNA of Eurybia divaricata 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 found8
Studies independent surveys1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 8 detections have coordinates
Open the map0 countries0
Open woods.understory of dry deciduous woods.Wooded slope.Pond area.Roadside.
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.
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 Foundation4 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility9 712 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI8 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics12 specimens↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
PloiDBPloidy Databasegenome & karyotype
GLoBIGlobal Biotic Interactionsbiotic interactions↗