Croptilon rigidifolium

(E.B.Sm.) E.B.Sm. · species

image placeholder — illustration coming later

Plantae/Tracheophyta/Magnoliopsida/Asterales/Asteraceae/Croptilon

At a glance

Occurrence records85

Data sources8

Biological traits9

DNA specimens1

eDNA detections1

Sources8 archives

Databases and archives Croptilon rigidifolium's data was compiled from.

WikipediaWikimedia Foundation2 languages↗

BioWikiNetmultilingual Wikipediamultilingual↗

GBIFGlobal Biodiversity Information Facility85 records↗

ENAEuropean Nucleotide Archive · EMBL-EBI1 eDNA detections↗

BOLD SystemsCentre for Biodiversity Genomics1 specimens↗

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 & measurements2 literature sources9 traits

Occurrence & distributionGBIF85 records

Environmental DNA1 datasets · 0 countries1 detections

DNA & barcodingBOLD1 specimens

Genome at a glanceCCDB2n = 10

01Narrative

Croptilon rigidifolium, called the stiff-leaf scratchdaisy, is a North American species of flowering plants in the tribe Astereae within the family Asteraceae. It has been found in the US State of Texas and also in the Mexican State of Nuevo León.Biota of North America Program 2014 county distribution mapSmith, Edwin Burnell 1965. Rhodora 67(771): 229-231 as Haplopappus rigidifoliusSmith, Edwin Burnell 1981. Sida 9(1): 60 Croptilon rigidifolium is an herb sometimes reaching a height of 150 cm (5 feet). Flower heads are yellow, with both ray florets and disc florets.Flora of North America, Stiff-leaf scratchdaisy, Croptilon rigidifolium (E. B. Smith) E. B. Smith

No narrative description available for this taxon yet.

02Traits & measurements

SourcesGIFTTRY

Size & morphology1

Seed mass0.302 mg

Life cycle & reproduction2

Life spanannual

Raunkiær life formtherophyte

Diet & foraging1

Parasiteindependent

Habitat & environment5

Aquaticterrestrial

Climberself-supporting

Epiphyteterrestrial

Growth formherb

Woodinessnon-woody

05DNA & barcoding1 specimens

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 Croptilon rigidifolium has left across the world's sequence archives.

At a glance

DNA specimens1

Marker genes1

eDNA detections1

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.

★ITS

fungal barcode

06Genome at a glanceCCDB

The complete instruction manual Croptilon rigidifolium 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 = 10 n = 5

Ploidydiploid inferred

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

2n 101×CCDB · book-fedorov

CCDB · book-fedorov — Smith E. B. 1965, 1966

n 41×CCDB · book-ipcn65

CCDB · book-ipcn65 — Smith 1965c

n 51×CCDB · book-ipcn66

CCDB · book-ipcn66 — E. B. Smith 1966a

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 type85 records

Wild obs. + sensor26

Museum / vouchered59

Range

Area of Occupancy AOO268 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 accuracy88% within 1 km

≤100 m 13≤1 km 1>10 km 2

16 georeferenced · 10 without coordinates

Open the mapobservation + sensor26

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 accuracy37% within 1 km

≤100 m 2≤1 km 9≤10 km 18>10 km 1

30 georeferenced · 29 without coordinates

Open the institutions mapphysical evidence59

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 institutions5 of 7 geolocated

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

Institution	Specimens
Austin, US	31
Wuzhou, CN	15
Texas Lutheran Universitylocation not on record	5
Fort Worth, US	5
Davis, US	1
US	1
BAYLUlocation not on record	1

7 institutions · 59 of 59 vouchered records shown

09Environmental DNA1 detections

Where the DNA of Croptilon rigidifolium 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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