Houstonia longifolia
Gaertn. · speciesAt a glance
Sources11 archives
Databases and archives Houstonia longifolia's data was compiled from.
WikipediaWikimedia Foundation4 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility4 707 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI15 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics35 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↗Every layer below draws on the sources above — open one to explore it, or use ← → to move between tabs.
Houstonia longifolia, commonly known as long-leaved bluet or longleaf summer bluet, is a perennial plant in the family Rubiaceae.Gaertner, Joseph. 1788 De Fructibus et Seminibus Plantarum: accedunt seminum centuriae quinque priores cum tabulis Aeneis LXXIX. Stutgardiae, Tubingae 1: 226 It can be found throughout most of the Eastern United States and Canada. It has been reported from every state east of the Mississippi River except Delaware, plus North Dakota, Minnesota, Missouri, Arkansas and Oklahoma, with isolated populations in Kansas and Texas. Also, all Canadian provinces from Quebec to Alberta.Biota of North America Program It prefers upland woods in poor, dry, often sandy soil, blooming from June to August.
No narrative description available for this taxon yet.
Size & morphology2
Life cycle & reproduction3
Diet & foraging1
Habitat & environment6
Physiology & chemistry2
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 longifolia has left across the world's sequence archives.
At a glance
★ 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.
The complete instruction manual Houstonia longifolia 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.
Genome sizehow big the whole instruction manual is
Measured in base pairs (bp) — the individual letters of DNA (human ≈ 3.2 Gb, a bacterium a few million). The chart places this genome on a logarithmic scale — each step to the right is ten times bigger — among reference organisms. Across species a bigger genome loosely tracks with larger cells, slower growth and lower-energy lifestyles (powered flight favours small genomes) — yet it does not imply more genes or a more advanced organism (the long-standing C-value paradox).
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.
2n 123×CCDB · ipcn-api-dl · CCDB · Cave1962
n 62×CCDB · Cave1962
diploid inferred1×PloiDB · genus-scale
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
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.
Record type4 707 records
Range
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
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.
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Holding institutions64 of 100 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
| Institution | Specimens |
|---|---|
| Madison, US | 206 |
| Chongqing Museumlocation not on record | 146 |
| Chapel Hill, US | 114 |
| Philadelphia, US | 82 |
| Saint Louis, US | 58 |
| Ann Arbor, US | 50 |
| Wuzhou, CN | 44 |
| Bloomington, US | 41 |
| Burlington, US | 40 |
| University of Stellenboschlocation not on record | 40 |
| Jena Microbial Resource Collectionlocation not on record | 37 |
| WINlocation not on record | 34 |
| Williamsburg, US | 27 |
| GAlocation not on record | 20 |
| St. Paul, US | 17 |
| Bangkok, TH | 16 |
| Morgantown, US | 15 |
| Green Bay, US | 14 |
| College Park, US | 14 |
| New Haven, US | 12 |
| Fayetteville, US | 12 |
| Columbia, US | 11 |
| Jackson, US | 10 |
| Toronto, CA | 10 |
| Lord Fairfax Community Collegelocation not on record | 9 |
| Millersville, US | 7 |
| Smithsonian Institutionlocation not on record | 6 |
| Knoxville, US | 6 |
| GB | 6 |
| Université Lavallocation not on record | 6 |
| Staten Island, US | 5 |
| Pittsburg, US | 5 |
| Clemson, US | 5 |
| Norfolk, US | 5 |
| Flagstaff, US | 4 |
| Tuscaloosa, US | 4 |
| Mississippi State, US | 4 |
| San Angelo, US | 4 |
| Emporia, US | 4 |
| Fairfax, US | 4 |
| BAYLUlocation not on record | 3 |
| Richmond, US | 3 |
| Vancouver, CA | 3 |
| Little Rock, US | 3 |
| DOI/NPS, Selma to Montgomery National Historic Traillocation not on record | 3 |
| Weymouth Woods Sandhills Nature Preservelocation not on record | 3 |
| Québec, CA | 3 |
| Dekalb, US | 3 |
| James F. Matthews Center for Biodiversity Studieslocation not on record | 3 |
| Montréal, CA | 3 |
| Valdosta State Universitylocation not on record | 3 |
| Durham, US | 3 |
| Logan, US | 2 |
| University of Alberta Museumslocation not on record | 2 |
| Fort Worth, US | 2 |
| DOI/NPS, Mississippi National River & Recreation Arealocation not on record | 2 |
| New Brunswick, US | 2 |
| Royal Ontario Museum, Green Plant Herbarium (TRT)location not on record | 2 |
| Maryland Department of Natural Resourceslocation not on record | 2 |
| Acadia Universitylocation not on record | 2 |
| Conway, US | 2 |
| Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record | 2 |
| AUAlocation not on record | 2 |
| DOI/NPS, Greenbelt Parklocation not on record | 2 |
| University of Tennessee at Chattanoogalocation not on record | 2 |
| EL PASO, US | 2 |
| Moscow, US | 2 |
| Beijing, CN | 1 |
| Austin, US | 1 |
| Springfield, US | 1 |
| MeiseBGlocation not on record | 1 |
| WTUlocation not on record | 1 |
| Boise, US | 1 |
| Johnson City, US | 1 |
| Wlocation not on record | 1 |
| US | 1 |
| Kirksville, US | 1 |
| Philadelphia, US | 1 |
| Northridge, US | 1 |
| University of Lethbridgelocation not on record | 1 |
| University of Southern Mississippilocation not on record | 1 |
| Tennessee Technological Universitylocation not on record | 1 |
| China Agricultural Universitylocation not on record | 1 |
| Saint John, CA | 1 |
| McWane Science Centerlocation not on record | 1 |
| Jefferson City, US | 1 |
| Cincinnati, US | 1 |
| Fredericksburg, US | 1 |
| Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record | 1 |
| Blacksburg, US | 1 |
| Bruce Peninsula National Parklocation not on record | 1 |
| Western Carolina Universitylocation not on record | 1 |
| Durham, US | 1 |
| Edmonton, CA | 1 |
| Science Museum of Minnesotalocation not on record | 1 |
| Denver, US | 1 |
| Royal Botanical Gardenslocation not on record | 1 |
| Tall Timbers Research Stationlocation not on record | 1 |
| Uppsala, SE | 1 |
| Whitewater, US | 1 |
Where the DNA of Houstonia longifolia 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
Where its DNA was found
How strong is each trace?
Modelled climatemodelled
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.