Trifolium microdon is a species of clover known by the common name thimble clover. It is native to western North America from British Columbia to southern California, where it grows in many types of habitat, including disturbed areas. It is an annual herb taking a decumbent or erect form. It is coated in hairs. The leaves are made up of oval leaflets with notched or flat tips, each measuring up to 1.5 centimeters long. The inflorescence is a head of flowers borne in a deep bowl-like involucre of bracts that can nearly envelop the whole head. The flower corollas are white to pink and about half a centimeter long.
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 Trifolium microdon has left across the world's sequence archives.
At a glance
DNA specimens11
Marker genes5
GenBank sequences10
eDNA detections6
Countries2
The DNA barcodea real sequence read deposited for this species
Trifolium microdon voucher UCJEPS Ahart Dittes & Guardino 18576 small subunit ribosomal RNA gene, partial sequence; internal transcribed spacer 1, 5.8S ribosomal RNA gene, and internal transcribed spacer 2, complete sequence; 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.
★matK1★rbcL★rbcLa★ITS9★ITS2
plant barcodefungal barcode
06Genome at a glanceCCDB
The complete instruction manualTrifolium microdon 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 origin13 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 type992 records
Wild obs. + sensor478
Museum / vouchered509
Other5
Range
Area of Occupancy AOO2 356 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 accuracy94% within 1 km
≤100 m 339≤1 km 30≤10 km 9>10 km 13
391 georeferenced · 87 without coordinates
Open the mapobservation + sensor478
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 accuracy59% within 1 km
≤100 m 23≤1 km 138≤10 km 106>10 km 6
273 georeferenced · 236 without coordinates
Open the institutions mapphysical evidence509
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 institutions38 of 53 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Victoria, CA
42
Corvallis, US
41
WTUlocation not on record
41
Davis, US
37
Santa Barbara, US
33
Pullman, US
24
Angwin, US
17
Arcata, US
17
San Luis Obispo, US
15
Claremont, US
14
DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record
14
Santa Cruz, US
13
Canadian Department of Agriculturelocation not on record
13
Vancouver, CA
9
US
8
Riverside, US
6
LDlocation not on record
6
San Francisco, US
6
Philadelphia, US
5
CASlocation not on record
4
DOI/NPS, San Juan Island National Historical Parklocation not on record
3
Portland, US
3
University of British Columbia, Herbariumlocation not on record
3
Bronx, US
3
Los Angeles, US
3
Chicago, US
2
Ashland, US
2
Valparaiso, CL
2
San Jose, US
2
Bloomington, US
2
MeiseBGlocation not on record
2
ASUlocation not on record
2
Pocatello, US
2
Kew, GB
1
Paris, FR
1
Montréal, CA
1
University of Stellenboschlocation not on record
1
Chongqing Museumlocation not on record
1
Catalina Island Conservancylocation not on record
1
Wuzhou, CN
1
San Diego, US
1
Logan, US
1
Northridge, US
1
Severin-McDaniel Insect Collectionlocation not on record
1
Knoxville, US
1
Mississippi State, US
1
Moscow, US
1
Tacoma, US
1
Uppsala, SE
1
Royal Ontario Museum, Green Plant Herbarium (TRT)location not on record
1
Saint John, CA
1
University of Lethbridgelocation not on record
1
Portland, US
1
53 institutions · 416 of 509 vouchered records shown · 93 without an institution code
09Environmental DNA6 detections
Where the DNA of Trifolium microdon 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 found6
Studies independent surveys1
Countries1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 6 detections have coordinates
Open the map1 country0
Open rocky-grassy point with T. microcephalum.
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 median12.9 °C 11.5–13.7
Seasonal swing summer↔winter12.4 °C
Max temp (day)16.4 °C 13.8–16.6
Min temp (night)9.60 °C 9.50–11.6
Precipitation46.0 mm/mo 36.2–54.0
Air humidity59.3 % 58.3–61.2
Moisture balance-71.1 mm/mo
Vapour deficit621 Pa 537–630
Wind speed3.80 m/s
Cloud cover43.3 % 41.7–43.4
CHELSA 1981–2010, ~9 km grid, at location & month of 4 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 Facility992 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI6 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics11 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↗