Arbutus xalapensis, communément appelé Texas madrone, Amazaquitl ou Texas madroño, est une espèce de plantes à fleurs de la famille des éricacées. Elle est présente en Amérique centrale, dans le Sud-Ouest des États-Unis et dans tout le Mexique. On la trouve dans les canyons et les montagnes, sur les plaines rocheuses et dans les chênaies, à des altitudes allant jusqu'à 3 000 m dans le sud de son aire de répartition, mais plus bas, jusqu'à 600 m dans le nord.
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 Arbutus xalapensis has left across the world's sequence archives.
At a glance
DNA specimens1
Marker genes1
eDNA detections1
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.
★ITS
fungal barcode
06Genome at a glanceCCDB
The complete instruction manualArbutus xalapensis 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.
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 origin2.02 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 type7 117 records
Wild obs. + sensor4 338
Museum / vouchered2 764
Cultivated / captive4
Other11
Range
Area of Occupancy AOO11 924 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 accuracy67% within 1 km
≤100 m 1 944≤1 km 372≤10 km 206>10 km 954
3 476 georeferenced · 862 without coordinates
Open the mapobservation + sensor4 338
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 accuracy75% within 1 km
≤100 m 1 170≤1 km 55≤10 km 336>10 km 69
1 630 georeferenced · 1 134 without coordinates
Open the institutions mapphysical evidence2 764
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
Coordinate accuracy
no georeferenced coordinates · 4 records without
Open the mapnot free-living4
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 institutions71 of 108 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Durango, MX
521
Mexico City, MX
237
Guasave, MX
205
Austin, US
200
Chicago, US
184
Saint Louis, US
150
Dekalb, US
134
Bronx, US
125
Madison, US
88
Ciudad de México, MX
73
Chapingo, MX
72
Mexico City, MX
65
Mexico City, MX
58
Austin, US
42
San Francisco, US
35
Autlán de Navarro, MX
31
Fort Worth, US
29
Tapachula, MX
25
MEXUlocation not on record
24
ASUlocation not on record
23
CASlocation not on record
23
Juriquilla, MX
20
Ciudad de México, MX
17
Giardini Botanici Hanburylocation not on record
16
EL PASO, US
16
Riverside, US
14
Claremont, US
13
Tuxtla Gutiérrez, MX
11
Sociedad para el Estudio de los Recursos Bióticos de Oaxaca, A. C.location not on record
11
BAYLUlocation not on record
10
Zacatecas, MX
10
Tuxtla Gutiérrez, MX
10
Guatemala City, GT
10
Philadelphia, US
10
San Jose State University, Museum of Birds and Mammalslocation not on record
9
Wuzhou, CN
9
Tampa, US
8
Puebla, MX
8
San Diego, US
7
Hermosillo, MX
7
San Angelo, US
7
University of Stellenboschlocation not on record
6
Paris, FR
6
St. Paul, US
6
Toluca, MX
6
Centro de Investigación en Biodiversidad y Conservación, Universidad Autónoma del Estado de Moreloslocation not on record
5
Anchorage, US
5
Flagstaff, US
5
Culiacán, MX
5
Lubbock, US
5
Antiguo Cuscatlán, SV
4
La Paz, MX
4
Mérida, MX
4
Cambridge, US
4
US
4
Albuquerque, US
4
León, NI
3
San Luis Potosí, MX
3
Denver, US
3
Instituto de Ecología Aplicada, Universidad Autónoma de Tamaulipaslocation not on record
3
CIIDIRlocation not on record
3
Rotorua, NZ
3
San Francisco de Campeche, MX
3
Phoenix, US
3
Instituto de Investigaciones Biológicas, Universidad Veracruzana, Región Xalapalocation not on record
2
US
2
Bloomington, US
2
Chongqing Museumlocation not on record
2
Tlalnepantla, MX
2
Burlington, US
2
Universidad de Autonoma de Baja Californialocation not on record
2
GB
2
Zapopan, MX
2
IEBlocation not on record
2
MeiseBGlocation not on record
2
Centro de Investigaciones Biológicas, Universidad Autónoma del Estado de Hidalgolocation not on record
1
CHAPlocation not on record
1
Arcata, US
1
The University of Arizonalocation not on record
1
Facultad de Ingeniería en Tecnología de la Madera, Universidad Michoacana de San Nicolás de Hidalgolocation not on record
1
Instituto de Ecología, Universidad Nacional Autónoma de Méxicolocation not on record
1
JBRJlocation not on record
1
Frankfurt am Main
1
Istituto Agrario Castelnuovolocation not on record
1
Universidad Nacional Autónoma de Honduraslocation not on record
1
Universidad Autónoma de Nayaritlocation not on record
1
Morelia, MX
1
Ann Arbor, US
1
ANSMlocation not on record
1
Escuela Agrícola Panamericanalocation not on record
1
New Mexico Museum of Natural History and Sciencelocation not on record
1
Centro de Enseñanza Técnica Industriallocation not on record
1
CHAPAlocation not on record
1
CICYTEXlocation not on record
1
Kew, GB
1
China Agricultural Universitylocation not on record
1
Canadian Department of Agriculturelocation not on record
1
Museo de Historia Natural de El Salvadorlocation not on record
1
NO DISPONIBLElocation not on record
1
DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record
1
Chicago, US
1
Berlin, DE
1
Santa Barbara, US
1
Edinburgh, GB
1
Chadron, US
1
Bangkok, TH
1
LDlocation not on record
1
San Luis Obispo, US
1
108 institutions · 2 719 of 2 764 vouchered records shown · 45 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 DNA1 detections
Where the DNA of Arbutus xalapensis 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 found1
Studies independent surveys1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 1 detections have coordinates
Open the map0 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.
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 Facility7 117 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI1 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics1 specimens↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
PloiDBPloidy Databasegenome & karyotype
WikidataWikimedia Foundationstructured facts↗
GLoBIGlobal Biotic Interactionsbiotic interactions↗