Cirsium mexicanum is a Mesoamerican and Caribbean species of plants in the tribe Cardueae within the family Asteraceae. Common name is Mexican thistle. It is widespread across Mexico (Tamaulipas, Durango, Jalisco, Puebla, Hidalgo, Veracruz, Tabasco, Oaxaca, Chiapas, Yucatán Peninsula),SEINet, Southwestern Biodiversity, Arizona Chapter, Cirsium mexicanum DC includes photos and Mexican distribution map Central America (all 7 countries) and the West Indies (Cuba, Hispaniola, Puerto Rico).Pérez J., L. A., M. Sousa Sánchez, A. M. Hanan-Alipi, F. Chiang Cabrera & P. Tenorio L. 2005. Vegetación terrestre. Cap. 4: 65–110. In J. Bueno, F Álvarez & S. Santiago (eds.) Biodivers. Tabasco. CONABIO-UNAM, México D.F..D'Arcy, W.G. 1987. Flora of Panama. Checklist and Index. Part 1: The introduction and checklist. Monographs in Systematic Botany from the Missouri Botanical Garden 17: v–xxx, 1–328Ibarra Manríquez, G. & S. Sinaca Colín. 1995. Lista florística comentada de la estación de biología tropical "Los Tuxtlas", Veracruz, Mexico. Revista de Biología Tropical 43(1–3): 75–115García-Mendoza, A. J. & J. A. Meave. 2011. Diversidad Florística de Oaxaca: de Musgos a Angispermas 1–351. Universidad Nacional Autónoma de México, Ciudad UniversitariaMolina Rosito, A. 1975. Enumeración de las plantas de Honduras. Ceiba 19(1): 1–118Tropicos, Cirsium mexicanum DC
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 Cirsium mexicanum has left across the world's sequence archives.
At a glance
DNA specimens3
Marker genes5
GenBank sequences8
eDNA detections2
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.
★matK5★rbcL2★rbcLa★ITS1★ITS2
plant barcodefungal barcode
06Genome at a glanceCCDB · GoaT · TreeOfSex
The complete instruction manualCirsium mexicanum 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.
CCDB · ipcn-api-dl — Ownbey, G. B., P. H. Raven & D. W. Kyhos. 1975 [1976]. Chromosome numbers in some North American species of the genus Cirsium. III. Western United States, Mexico, and Guatemala. Brittonia 27(4): 297–304.
CCDB · book-ipcn67-71 — OWNBEY, G.B. 1968. Cytotaxonomic notes on eleven species of Cirsium native to Mexico. Brittonia 20: 336-342.
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Coordinate accuracy85% within 1 km
≤100 m 119≤1 km 66≤10 km 21>10 km 12
218 georeferenced · 96 without coordinates
Open the mapobservation + sensor314
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 accuracy97% within 1 km
≤100 m 299≤1 km 7≤10 km 9>10 km 2
317 georeferenced · 471 without coordinates
Open the institutions mapphysical evidence788
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 institutions41 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
Saint Louis, US
151
Durango, MX
143
Mexico City, MX
78
Austin, US
57
National Biodiversity Institute, Costa Ricalocation not on record
46
Bronx, US
45
Tuxtla Gutiérrez, MX
41
Antiguo Cuscatlán, SV
14
Tapachula, MX
14
University of Stellenboschlocation not on record
12
Kew, GB
12
Zacatecas, MX
11
León, NI
11
Mérida, MX
9
Tuxtla Gutiérrez, MX
8
San José, CR
8
Instituto de Ecología Aplicada, Universidad Autónoma de Tamaulipaslocation not on record
5
Riverside, US
5
Universidad Juárez Autónoma de Tabascolocation not on record
5
Mérida, MX
4
Tlalnepantla, MX
4
NO DISPONIBLElocation not on record
4
Guasave, MX
4
Berlin, DE
4
Ciudad de México, MX
4
ASUlocation not on record
3
Juriquilla, MX
3
Austin, US
3
San Francisco, US
3
University of Zhejianglocation not on record
2
Jena Microbial Resource Collectionlocation not on record
2
Mexico City, MX
2
Area de Conservacion Guanacastelocation not on record
2
Tampa, US
2
HEMlocation not on record
2
Cambridge, US
2
Morelia, MX
2
San Francisco de Campeche, MX
2
Sociedad para el Estudio de los Recursos Bióticos de Oaxaca, A. C.location not on record
1
CASlocation not on record
1
Claremont, US
1
Chapingo, MX
1
Uniwersytet Śląski w Katowicachlocation not on record
1
Autlán de Navarro, MX
1
Puebla, MX
1
Phoenix, US
1
Managua, NI
1
Universidad Nacional Autónoma de Honduraslocation not on record
1
Calabar, NG
1
Elocation not on record
1
MEXUlocation not on record
1
San Diego, US
1
CIIDIRlocation not on record
1
Instituto de Investigaciones Biológicas, Universidad Veracruzana, Región Xalapalocation not on record
1
BMlocation not on record
1
Montpellier, FR
1
OTSlocation not on record
1
Ann Arbor, US
1
Wuzhou, CN
1
EL PASO, US
1
Mexico City, MX
1
Instituto de Investigaciones Botánicas y Zoológicas - Prof. Rafael M. Moscoso, Universidad Autónoma de Santo Domingolocation not on record
1
62 institutions · 753 of 788 vouchered records shown · 35 without an institution code
09Environmental DNA2 detections
Where the DNA of Cirsium mexicanum 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 median24.8 °C 24.4–25.2
Seasonal swing summer↔winter2.50 °C
Max temp (day)28.6 °C 27.4–29.8
Min temp (night)21.4 °C 21.1–21.6
Precipitation129 mm/mo 38.4–220
Air humidity64.2 % 60.3–68.0
Moisture balance-36.3 mm/mo -139–66.8
Vapour deficit1,124 Pa 979–1,268
Wind speed4.70 m/s 4.00–5.40
Cloud cover26.1 % 16.0–36.1
CHELSA 1981–2010, ~9 km grid, at location & month of 2 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 Facility1 102 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI2 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics3 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↗