Alstonia scholaris
(L.) R.Br. · speciesAt a glance
Sources15 archives
Databases and archives Alstonia scholaris's data was compiled from.
WikipediaWikimedia Foundation12 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility12 059 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI44 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics52 specimens↗
NCBIUS National Library of Medicinesequences↗
dukesphytochemcompounds
LOTUSNatural Products (Wikidata)compounds↗
NPASSNat. Product Activity & Species Sourcecompounds↗
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
WikidataWikimedia Foundationstructured facts↗Every layer below draws on the sources above — open one to explore it, or use ← → to move between tabs.
Alstonia scholaris, commonly called blackboard tree or devil's tree in English, is an evergreen tropical tree in the family Apocynaceae. It is native to southern China, tropical Asia (mainly the Indian subcontinent and Southeast Asia）and Australasia, where it is a common ornamental plant. It is a toxic plant, but is used traditionally for myriad diseases and complaints.
No narrative description available for this taxon yet.
Size & morphology20
Life cycle & reproduction9
Diet & foraging1
Habitat & environment15
Physiology & chemistry8
Other traits5
Compounds documented for Alstonia scholaris across natural-product and food-composition databases — not just the ~150 nutrients on a classic label ("nutritional dark matter").
Compound class profile5 classes
Documented compounds172 total
| Compound | Class | Amount | Source |
|---|---|---|---|
| (+)-Tubotaiwine | present | LOTUS | |
| (12S,19R)-12-ethyl-19-hydroxy-8,16-diazatetracyclo[10.6.1.02,7.016,19]nonadeca-1(18),2,4,6-tetraene-9,17-dione | present | LOTUS | |
| (1R,4aS,6S,7R,7aS)-1-methoxy-7-methyl-1,3,4,4a,5,6,7,7a-octahydrocyclopenta[c]pyran-6-ol | present | LOTUS | |
| (1R,4aS,6S,7R,7aS)-7-methyl-1,3,4,4a,5,6,7,7a-octahydrocyclopenta[c]pyran-1,6-diol | present | LOTUS | |
| (1S,12S,13R,16R,17R,18R)-3,16,20-trimethyl-15-oxa-3,20-diazapentacyclo[10.7.1.02,10.04,9.013,18]icosa-2(10),4,6,8-tetraene-17-carbaldehyde | present | LOTUS | |
| (1S,2R,4aS,6aR,6aS,6bR,8aR,10S,12aR,14bR)-10-hydroxy-1,2,6a,6b,9,9,12a-heptamethyl-2,3,4,5,6,6a,7,8,8a,10,11,12,13,14b-tetradecahydro-1H-picene-4a-carboxylic acid | present | LOTUS | |
| (1S,2R,4aS,6aR,6aS,6bR,8aS,10S,12aR,14bR)-10-hydroxy-1,2,6a,6b,9,9,12a-heptamethyl-2,3,4,5,6,6a,7,8,8a,10,11,12,13,14b-tetradecahydro-1H-picene-4a-carboxylic acid | present | LOTUS | |
| (2E)-2-[(4R)-4-[1-(1H-indol-2-yl)ethenyl]-1-methylpiperidin-3-ylidene]ethanol | present | LOTUS | |
| (2E,4E,6E,8E,10E,12E,14E,16E)-17-((4R)-4-Hydroxy-2,6,6-trimethyl-1-cyclohexen-1-yl)-2,6,11,15-tetramethyl-2,4,6,8,10,12,14,16-heptadecaoctaenal | present | NPASS | |
| (2Z)-2-[(4S)-4-[1-(1H-indol-2-yl)ethenyl]-1-methylpiperidin-3-ylidene]ethanol | present | LOTUS |
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 Alstonia scholaris 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 Alstonia scholaris 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 443×CCDB · ipcn-api-dl · CCDB · book-indian_vol1 · CCDB · book-fedorov
2n 221×CCDB · book-ipcn73-74
2n 401×CCDB · book-indian_vol1
n 202×CCDB · ipcn-api-dl · CCDB · book-ipcn67-71
polyploid inferred1×PloiDB · family-scale
Sequencing statusassembly quality — how far to trust these numbers
Assembly level tells you how finished the sequence is — from fragmented contigs, through scaffolds, up to a full chromosome-level assembly. BUSCO % estimates completeness: the share of genes expected to be present that were actually found. These describe the data quality, not the organism.
Record type12 059 records
Origin
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.
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Holding institutions40 of 65 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
| Institution | Specimens |
|---|---|
| Brisbane, AU | 83 |
| Smithfield, AU | 70 |
| Kunming, CN | 39 |
| Beijing, CN | 38 |
| Guilin, CN | 33 |
| Canberra, AU | 31 |
| Museo Entomologico de Leonlocation not on record | 26 |
| Baroda, IN | 22 |
| Saint Louis, US | 21 |
| Guangzhou, CN | 15 |
| Taipei, TW | 12 |
| Kew, GB | 12 |
| National Institute of Biological Resourceslocation not on record | 8 |
| Fort Worth, US | 8 |
| St. Paul, US | 6 |
| Pondicherry, IN | 6 |
| St. Augustine, TT | 6 |
| Paris, FR | 6 |
| Cibinong Science Center, Herbarium Bogorienselocation not on record | 5 |
| National Museum of Natural Sciencelocation not on record | 5 |
| 云南省思茅市民族传统医药研究所location not on record | 5 |
| Bronx, US | 5 |
| Palmerston, AU | 5 |
| Tampa, US | 4 |
| Nanjing, CN | 4 |
| Ivano-Frankivsk, UA | 4 |
| Stockholm, SE | 3 |
| Xiamen, CN | 3 |
| University of Stellenboschlocation not on record | 3 |
| Philadelphia, US | 3 |
| Vancouver, CA | 3 |
| Guangxi Institute of Traditional Medical and Pharmaceutical Scienceslocation not on record | 3 |
| Edinburgh, GB | 3 |
| Mount Annan, AU | 3 |
| Sri Ramaswamy Memorial Universitylocation not on record | 3 |
| Honolulu, US | 3 |
| James Cook Townsvillelocation not on record | 3 |
| ASUlocation not on record | 2 |
| Parkville, AU | 2 |
| Miami, US | 2 |
| Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record | 2 |
| Natural History Museum, Tribhuvan Universitylocation not on record | 2 |
| Cambridge University Herbariumlocation not on record | 2 |
| Zhengzhou, CN | 2 |
| LDlocation not on record | 2 |
| Yunnan Universitylocation not on record | 2 |
| The Maharaja Sayajirao University of Barodalocation not on record | 2 |
| Gujarat Biodiversity Gene Banklocation not on record | 1 |
| CSIRO, Tropical Forest Research Centrelocation not on record | 1 |
| University of the Sunshine Coastlocation not on record | 1 |
| Herbarium of South China Botanical Gardenlocation not on record | 1 |
| Jinghong, CN | 1 |
| Istituto Agrario Castelnuovolocation not on record | 1 |
| San Jose State University, Museum of Birds and Mammalslocation not on record | 1 |
| TAIElocation not on record | 1 |
| Yangling, CN | 1 |
| Santa Barbara, US | 1 |
| Armidale, AU | 1 |
| Kensington, AU | 1 |
| Adelaide, AU | 1 |
| UNICAMPlocation not on record | 1 |
| John T. Waterhouse Herbariumlocation not on record | 1 |
| South Kensington, GB | 1 |
| Dehra Dun, IN | 1 |
| Auckland, NZ | 1 |
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
Where the DNA of Alstonia scholaris 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.