Houstonia purpurea (formerly Hedyotis purpurea) is a species of flowering plant in the coffee family known by the common names Venus's pride, woodland bluet, and purple bluet. It is native to the eastern United States from eastern Texas and Oklahoma east to Florida and Pennsylvania, with scattered populations in Nebraska, Iowa, Michigan, New York State and New England. There are three varieties of this species. The rarest, var. montana (Roan Mountain bluet) is a federally listed endangered species of the United States. It occurs only in the southern Appalachians along the border between Tennessee and North Carolina. It is named for Roan Mountain, one of a very few mountain peaks where it grows.USFWS. Determination of endangered status for Geum radiatum and Hedyotis purpurea var. montana. Federal Register April 5, 1990.Houstonia purpurea var. montana. Center for Plant Conservation. Flower Leaf
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 Houstonia purpurea has left across the world's sequence archives.
At a glance
DNA specimens7
Marker genes4
GenBank sequences10
eDNA detections4
Countries1
The DNA barcodea real sequence read deposited for this species
Houstonia purpurea var. purpurea voucher S. Church & D. Church 136(IND) 18S ribosomal RNA gene, partial sequence; internal transcribed spacer 1, complete sequence; and 5.8S 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★rbcL1★rbcLa★ITS8
plant barcodefungal barcode
06Genome at a glanceCCDB
The complete instruction manualHoustonia purpurea 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.
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Coordinate accuracy84% within 1 km
≤100 m 3 008≤1 km 571≤10 km 273>10 km 403
4 255 georeferenced · 1 102 without coordinates
Open the mapobservation + sensor5 357
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 accuracy60% within 1 km
≤100 m 144≤1 km 152≤10 km 169>10 km 29
494 georeferenced · 321 without coordinates
Open the institutions mapphysical evidence815
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 · 1 records without
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 institutions57 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
Bangkok, TH
129
University of Stellenboschlocation not on record
87
Chapel Hill, US
83
Williamsburg, US
61
Jena Microbial Resource Collectionlocation not on record
49
Chongqing Museumlocation not on record
49
Jackson, US
33
Knoxville, US
22
Philadelphia, US
22
College Park, US
19
Western Carolina Universitylocation not on record
18
Saint Louis, US
13
DOI/NPS, Mississippi National River & Recreation Arealocation not on record
13
Asheville, US
11
Johnson City, US
10
Washington, US
10
Columbia, US
9
AUAlocation not on record
8
Tennessee Technological Universitylocation not on record
7
GAlocation not on record
6
Richmond, US
6
Mount Berry, US
5
Morgantown, US
5
Norfolk, US
5
University of Tennessee at Chattanoogalocation not on record
5
University of Southern Mississippilocation not on record
5
Davenport, US
5
BAYLUlocation not on record
4
Burlington, US
4
Long Beach, US
4
Northridge, US
4
Bloomington, US
4
EL PASO, US
4
Dover, US
3
Tuscaloosa, US
3
Durham, US
3
Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record
3
Chicago, US
3
Flagstaff, US
3
Appalachian State Universitylocation not on record
3
Millersville, US
3
China Agricultural Universitylocation not on record
3
Clemson, US
3
Fairfax, US
2
Conway, US
2
University of North Carolina at Pembrokelocation not on record
2
San Angelo, US
2
Austin, US
2
St. Paul, US
2
DOI/NPS, Greenbelt Parklocation not on record
2
Mississippi State, US
2
Columbus State Universitylocation not on record
2
Valdosta State Universitylocation not on record
2
Fort Worth, US
2
Edmonton, CA
2
Bronx, US
2
Moscow State Universitylocation not on record
2
Grand Junction, US
1
Elikins, US
1
Durango, US
1
Canadian Department of Agriculturelocation not on record
1
Staten Island, US
1
Institut und Museum fuer Geologie und Palaeontologielocation not on record
1
Fayetteville, US
1
Edinburgh, GB
1
James F. Matthews Center for Biodiversity Studieslocation not on record
1
Springfield, US
1
Ann Arbor, US
1
Beijing, CN
1
GB
1
Weymouth Woods Sandhills Nature Preservelocation not on record
1
US
1
Moscow, US
1
Boise, US
1
Dekalb, US
1
Kirksville, US
1
Institut de Biologia Evolutiva, (CSIC-UPF)location not on record
1
Paris, FR
1
Denver, US
1
Lincoln, US
1
Riverside, US
1
81 institutions · 801 of 815 vouchered records shown · 14 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 DNA4 detections
Where the DNA of Houstonia purpurea 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 found4
Studies independent surveys1
Countries1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 4 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 median21.7 °C 18.0–21.7
Seasonal swing summer↔winter21.7 °C
Max temp (day)27.4 °C 23.8–27.4
Min temp (night)16.6 °C 12.8–16.7
Precipitation143 mm/mo 128–146
Air humidity57.8 % 56.7–58.2
Moisture balance-7.50 mm/mo -18.5–-7.10
Vapour deficit1,083 Pa 896–1,091
Wind speed3.50 m/s 2.70–4.00
Cloud cover39.4 % 39.4–40.8
CHELSA 1981–2010, ~9 km grid, at location & month of 3 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 Foundation4 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility6 173 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI4 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics7 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
Paleobiology DatabasePBDB consortiumfossil record↗
GLoBIGlobal Biotic Interactionsbiotic interactions↗