Pleurocoronis pluriseta is a species of flowering plant in the family Asteraceae known by the common name bush arrowleaf. It is native to the southwestern United States and northern Mexico, where it grows in desert scrub and similar habitat. This is a clumpy or bushy subshrub reaching up to about half a meter in maximum height with many slender branches. The distinctive leaves are several centimeters in length and are mostly petiole; there is generally a toothed diamond- or arrowhead-shaped blade no more than one centimeter long at the very tip. The inflorescence is made up of one or two flower heads, sometimes more. Each flower head is somewhat cylindrical or bullet-shaped, measuring up to about a centimeter long. The head is discoid, containing only disc florets and no ray florets. It is lined with a series of many phyllaries coated thinly in glandular hairs and often streaked with purple-red coloration. The tips of the outer phyllaries curve outward. The fruit is a hairy, ribbed achene a few millimeters long with a pappus of bristles and scales on its tip.
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 Pleurocoronis pluriseta has left across the world's sequence archives.
At a glance
DNA specimens4
Marker genes5
GenBank sequences6
eDNA detections2
Countries1
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★ITS2★ITS2
plant barcodefungal barcode
06Genome at a glanceCCDB
The complete instruction manualPleurocoronis pluriseta 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 182×CCDB · book-ipcn67-71 · CCDB · eflora
CCDB · book-ipcn67-71 — KING, R. M. 1967. Studies in the Eupatorieae (Compositae) I-III. Rhodora 69: 35-47.
CCDB · eflora
n 91×CCDB · ipcn-api-dl
CCDB · ipcn-api-dl — King, R. M., D. W. Kyhos, A. M. Powell, P. H. Raven & H. Robinson. 1976 [1977]. Chromosome numbers in Compositae. XIII. Eupatorieae. Ann. Missouri Bot. Gard. 63(4): 862–888.
Ploidy records — measured levels and diploid/polyploid inferences · click for sources
How far back this lineage goes — and how we know. Everything here is measured in Ma, short for “mega-annum”: millions of years ago. The chart reads left to right like a calendar of the Earth, from the deep past on the left to today at the right edgetop to bottom like a core drilled through the Earth, from the deep past at the top down to today at the bottom.
At a glance
DNA clock origin6.13 Ma TimeTree
When this lineage existed
How to read this: the coloured strip along the bottomdown the left is the geological calendar — the standard epochs (Pliocene, Pleistocene…) every museum uses, shown so you can see which chapter of Earth's history this lineage lived in. This lineage is a young one, so the strip is zoomed in to epochs — the finer subdivisions inside a period. The orange marker is the DNA clock: DNA accumulates mutations at a roughly steady rate, so comparing this species' DNA with its relatives estimates when the lineage split off — independently of any fossil.
DNA clock origin
08Occurrence & distribution
Record type2 180 records
Wild obs. + sensor1 269
Museum / vouchered911
Origin
Native175
Range
Area of Occupancy AOO3 720 km²
Wildobservation + sensor
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 556≤1 km 54≤10 km 31>10 km 28
669 georeferenced · 600 without coordinates
Open the mapobservation + sensor1 269
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 accuracy66% within 1 km
≤100 m 100≤1 km 126≤10 km 109>10 km 7
342 georeferenced · 569 without coordinates
Open the institutions mapphysical evidence911
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 institutions37 of 49 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Claremont, US
213
Riverside, US
143
San Diego, US
127
ASUlocation not on record
54
Phoenix, US
48
Flagstaff, US
41
CASlocation not on record
39
Santa Barbara, US
21
Los Angeles, US
15
Arcata, US
14
Henderson, US
14
San Luis Obispo, US
12
Severin-McDaniel Insect Collectionlocation not on record
10
Ensenada, MX
10
Pullman, US
8
Mexico City, MX
8
Arizona State University Biocollectionslocation not on record
7
US
5
EL PASO, US
5
La Paz, MX
4
DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record
4
DOI/NPS, Colonial National Historical Parklocation not on record
4
Davis, US
4
The University of Arizonalocation not on record
3
Pocatello, US
3
Irvine, US
3
Arizona Western Collegelocation not on record
3
Orem, US
3
Wuzhou, CN
3
Bronx, US
2
Northridge, US
2
DOI/NPS, Greenbelt Parklocation not on record
2
Provo, US
2
Hermosillo, MX
2
US
2
Angwin, US
2
University of Stellenboschlocation not on record
1
Logan, US
1
Chadron, US
1
Denver, US
1
San Jose, US
1
Québec, CA
1
Boise, US
1
Columbia, US
1
San Francisco, US
1
San Diego Natural History Museum, Herbariumlocation not on record
1
Calabar, NG
1
Austin, US
1
Musee des Dinosaures d'Esperaza (Aude)location not on record
1
49 institutions · 855 of 911 vouchered records shown · 56 without an institution code
09Environmental DNA2 detections
Where the DNA of Pleurocoronis pluriseta 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 found2
Studies independent surveys1
Countries1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 2 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 median18.2 °C 18.2–18.2
Seasonal swing summer↔winter19.5 °C
Max temp (day)24.5 °C
Min temp (night)11.5 °C
Precipitation29.0 mm/mo
Air humidity47.2 %
Moisture balance-110 mm/mo
Vapour deficit1,108 Pa
Wind speed3.50 m/s
Cloud cover31.8 %
CHELSA 1981–2010, ~9 km grid, at location & month of 1 detection point · 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 180 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI2 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics4 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↗