Silphium radula

Nutt. · species

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Plantae/Tracheophyta/Magnoliopsida/Asterales/Asteraceae/Silphium

At a glance

Occurrence records828

Data sources9

Biological traits12

DNA specimens0

eDNA detections1

Sources9 archives

Databases and archives Silphium radula's data was compiled from.

WikipediaWikimedia Foundation2 languages↗

BioWikiNetmultilingual Wikipediamultilingual↗

GBIFGlobal Biodiversity Information Facility828 records↗

ENAEuropean Nucleotide Archive · EMBL-EBI1 eDNA detections↗

LOTUSNatural Products (Wikidata)compounds↗

GRIN TaxonomyUSDA-ARSdistribution & uses↗

Open Tree of LifeOpenTreephylogeny backbone↗

CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗

PloiDBPloidy Databasegenome & karyotype

On this page6 sections

Every layer below draws on the sources above — open one to explore it, or use ← → to move between tabs.

NarrativeWikipediaarticle

Traits & measurements3 literature sources12 traits

Chemical compositionLOTUS9 compounds

Occurrence & distributionGBIF828 records

Environmental DNA1 datasets · 0 countries1 detections

Genome at a glanceCCDB2n = 14

01Narrative

Silphium radula, commonly known as roughstem rosinweed, is a species of flowering plant in the family Asteraceae. It is native North America, where it is found in the South Central region of the United States. Its natural habitat is prairies over sandy or calcareous soil.Silphium radula var. radula Flora of North America

No narrative description available for this taxon yet.

02Traits & measurements

SourcesWCVPTRYGIFT

Size & morphology3

Seed mass22.92 mg

Seed mass max22.92 mg

Seed mass min22.92 mg

Life cycle & reproduction2

Life formperennial

Life spanperennial

Diet & foraging1

Parasiteindependent

Habitat & environment6

Aquaticterrestrial

Climatetemperate

Climberself-supporting

Epiphyteterrestrial

Growth formherb

Woodinessnon-woody

03Chemical composition9 compounds

Compounds documented for Silphium radula across natural-product and food-composition databases — not just the ~150 nutrients on a classic label ("nutritional dark matter").

Compound class profile2 classes

Oleanane triterpenoids7

Ursane and Taraxastane triterpenoids2

Documented compounds9 total

Tissue Source Quantified only

Compound	Amount	Source
(2R,3R,4S,5S,6R)-2-[[(3S,4aR,5R,6aR,6bS,8S,8aS,10S,11S,12R,12aS,14aR,14bR)-5,8,10-trihydroxy-4,4,6a,6b,8a,11,12,14b-octamethyl-2,3,4a,5,6,7,8,9,10,11,12,12a,14,14a-tetradecahydro-1H-picen-3-yl]oxy]-6-(hydroxymethyl)oxane-3,4,5-triol	present	LOTUS
(2R,3R,4S,5S,6R)-2-[[(3S,4aR,5R,6aR,6bS,8S,8aS,10S,12aS,14aR,14bR)-5,8,10-trihydroxy-4,4,6a,6b,8a,11,11,14b-octamethyl-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicen-3-yl]oxy]-6-(hydroxymethyl)oxane-3,4,5-triol	present	LOTUS
(2R,3R,4S,5S,6R)-2-[[(3S,4aR,5R,6aR,6bS,8S,8aS,12aS,14aR,14bR)-8-[(2R,3S,4S,5S,6R)-4,5-dihydroxy-6-(hydroxymethyl)-3-[(2S,3R,4S,5S)-3,4,5-trihydroxyoxan-2-yl]oxyoxan-2-yl]oxy-5-hydroxy-4,4,6a,6b,8a,11,11,14b-octamethyl-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicen-3-yl]oxy]-6-(hydroxymethyl)oxane-3,4,5-triol	present	LOTUS
(2R,3R,4S,5S,6R)-2-[[(3S,4R,4aR,5R,6aR,6bS,8S,8aS,10S,12aS,14aR,14bR)-5,10-dihydroxy-4-(hydroxymethyl)-4,6a,6b,8a,11,11,14b-heptamethyl-8-[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicen-3-yl]oxy]-6-(hydroxymethyl)oxane-3,4,5-triol	present	LOTUS
(2R,3R,4S,5S,6R)-2-[[(3S,4R,4aR,5R,6aR,6bS,8S,8aS,12aS,14aR,14bR)-8-[(2R,3S,4S,5S,6R)-4,5-dihydroxy-6-(hydroxymethyl)-3-[(2S,3R,4S,5S)-3,4,5-trihydroxyoxan-2-yl]oxyoxan-2-yl]oxy-5-hydroxy-4-(hydroxymethyl)-4,6a,6b,8a,11,11,14b-heptamethyl-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicen-3-yl]oxy]-6-(hydroxymethyl)oxane-3,4,5-triol	present	LOTUS
(2S,3R,4S,5R,6R)-2-[(2R,3R,4S,5S,6R)-2-[[(3S,4aR,5R,6aR,6bS,8S,8aS,11R,12S,12aS,14aR,14bR)-5,8-dihydroxy-4,4,6a,6b,8a,11,12,14b-octamethyl-2,3,4a,5,6,7,8,9,10,11,12,12a,14,14a-tetradecahydro-1H-picen-3-yl]oxy]-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]oxy-6-(hydroxymethyl)oxane-3,4,5-triol	present	LOTUS
(3S,4S,4aR,5R,6aR,6bS,8S,8aS,10S,12aS,14aR,14bR)-5,8,10-trihydroxy-4,6a,6b,8a,11,11,14b-heptamethyl-3-[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicene-4-carbaldehyde	present	LOTUS
(3S,4S,4aR,5R,6aR,6bS,8S,8aS,12aS,14aR,14bR)-5-hydroxy-4,6a,6b,8a,11,11,14b-heptamethyl-3,8-bis[[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy]-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicene-4-carbaldehyde	present	LOTUS
(3S,4S,4aR,5R,6aR,6bS,8S,8aS,12aS,14aR,14bR)-5-hydroxy-4,6a,6b,8a,11,11,14b-heptamethyl-3,8-bis[[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy]-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicene-4-carboxylic acid	present	LOTUS

05DNA & barcoding1 eDNA hits

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 Silphium radula has left across the world's sequence archives.

At a glance

eDNA detections1

06Genome at a glanceCCDB

The complete instruction manual Silphium radula 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.

Chromosomes2n = 14 n = 7

Ploidydiploid inferred

Chromosome records14–142n range14median14mode8records

Chromosome-count records — grouped by value · 2n = full set, n = gamete · click a value for sources & references

2n 148×CCDB · ipcn-api-dl · CCDB · book-ipcn67-71 · CCDB · eflora +1

CCDB · ipcn-api-dl — Xu, H. y., M. y. Chang & L. c. Tian. 1992. Studies on the karyotypes of 8 species in Silphium. Chin. Bull. Bot. 9(3): 47–49.

CCDB · ipcn-api-dl — Zhao, Z. 1996. Documented chromosome numbers 1996:2. Miscellaneous U. S. A. and Mexican species, mostly Asteraceae. Sida 17(1): 259–263.

CCDB · book-ipcn67-71 — SETTLE, w. J. 1967. The chromosome morphology in the genus Silphium (Compositae). Ohio Jour. Sci. 67: 10-19.

CCDB · eflora

CCDB · book-fedorov — Fisher T. R., Cruden 1962

n 71×CCDB · Cave1962

CCDB · Cave1962 — Fisher & Cruden 1962

n 81×CCDB · ipcn-api-dl

CCDB · ipcn-api-dl — Smith, E. B., P. E. Hyatt & K. D. Golden. 1992. Documented chromosome numbers 1992: 1. Chromosome numbers of some Arkansas flowering plants. Sida 15: 145–146.

Ploidy records — measured levels and diploid/polyploid inferences · click for sources

diploid inferred1×PloiDB · genus-scale

PloiDB · genus-scale — chromEvol; reliability=1.000 ↗

08Occurrence & distribution

Record type828 records

Wild obs. + sensor697

Museum / vouchered131

Range

Area of Occupancy AOO1 592 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 accuracy91% within 1 km

≤100 m 391≤1 km 51≤10 km 16>10 km 29

487 georeferenced · 210 without coordinates

Open the mapobservation + sensor697

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 accuracy38% within 1 km

≤100 m 6≤1 km 12≤10 km 26>10 km 4

48 georeferenced · 83 without coordinates

Open the institutions mapphysical evidence131

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 institutions15 of 19 geolocated

Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.

Institution	Specimens
Fort Worth, US	63
Texas Lutheran Universitylocation not on record	22
BAYLUlocation not on record	9
US	8
Austin, US	6
Bronx, US	5
Lubbock, US	2
Phoenix, US	2
San Angelo, US	2
Chongqing Museumlocation not on record	2
Bloomington, US	2
Flagstaff, US	1
Stockholm, SE	1
Denton, US	1
Saint Louis, US	1
Canadian Department of Agriculturelocation not on record	1
Clemson, US	1
Bangkok, TH	1
Jackson, US	1

19 institutions · 131 of 131 vouchered records shown

09Environmental DNA1 detections

Where the DNA of Silphium radula 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.

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