Nemacaulis denudata — The Life Data

Plantae/Tracheophyta/Magnoliopsida/Caryophyllales/Polygonaceae/Nemacaulis

At a glance

Occurrence records358

Data sources7

Biological traits10

DNA specimens6

eDNA detections2

Sources7 archives

Databases and archives Nemacaulis denudata's data was compiled from.

WikipediaWikimedia Foundation4 languages↗

BioWikiNetmultilingual Wikipediamultilingual↗

GBIFGlobal Biodiversity Information Facility358 records↗

ENAEuropean Nucleotide Archive · EMBL-EBI2 eDNA detections↗

BOLD SystemsCentre for Biodiversity Genomics6 specimens↗

GRIN TaxonomyUSDA-ARSdistribution & uses↗

Open Tree of LifeOpenTreephylogeny backbone↗

On this page5 sections

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

NarrativeWikipediaarticle

Traits & measurements2 literature sources10 traits

Occurrence & distributionGBIF358 records

Environmental DNA1 datasets · 1 countries2 detections

DNA & barcodingBOLD6 specimens

01Narrative

Nemacaulis is a monotypic plant genus in the buckwheat family containing the single species Nemacaulis denudata, which is known by the common names woollyheads and cottonheads. This plant is a somewhat nondescript delicate annual herb with thin, spindly, naked stems and woolly white flowerheads. It can be found in sandy habitats in California, Arizona, and northern Mexico.

No narrative description available for this taxon yet.

02Traits & measurements

SourcesWCVPGIFT

Life cycle & reproduction3

Life formannual

Life spanannual

Raunkiær life formtherophyte

Diet & foraging1

Parasiteindependent

Habitat & environment6

Aquaticterrestrial

Climatesubtropical

Climberself-supporting

Epiphyteterrestrial

Growth formherb

Woodinessnon-woody

05DNA & barcoding6 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 Nemacaulis denudata has left across the world's sequence archives.

At a glance

DNA specimens6

Marker genes4

eDNA detections2

Countries1

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.

matKrbcLaITSITS2

plant barcodefungal barcode

08Occurrence & distribution

Record type358 records

Wild obs. + sensor209

Museum / vouchered149

Range

Area of Occupancy AOO624 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 accuracy85% within 1 km

≤100 m 126≤1 km 9≤10 km 3>10 km 20

158 georeferenced · 51 without coordinates

Open the mapobservation + sensor209

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 accuracy78% within 1 km

≤100 m 61≤1 km 6≤10 km 16>10 km 3

86 georeferenced · 63 without coordinates

Open the institutions mapphysical evidence149

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 institutions25 of 31 geolocated

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

Institution	Specimens
San Diego, US	35
Riverside, US	16
Austin, US	15
Ensenada, MX	13
Phoenix, US	8
Santa Barbara, US	7
ASUlocation not on record	7
Claremont, US	7
Mexico City, MX	6
Irvine, US	4
Austin, US	4
Saint Louis, US	3
EL PASO, US	3
Los Angeles, US	2
South Kensington, GB	2
Mexico City, MX	1
Bronx, US	1
La Paz, MX	1
Davis, US	1
Arcata, US	1
University of Stellenboschlocation not on record	1
DOI/NPS, Colonial National Historical Parklocation not on record	1
Chicago, US	1
Canadian Department of Agriculturelocation not on record	1
Durham, US	1
Durango, MX	1
Hermosillo, MX	1
Flagstaff, US	1
Arizona State University Biocollectionslocation not on record	1
Severin-McDaniel Insect Collectionlocation not on record	1
Bloomington, US	1

31 institutions · 148 of 149 vouchered records shown · 1 without an institution code

09Environmental DNA2 detections

Where the DNA of Nemacaulis denudata 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 found2

Studies independent surveys1

Countries1

Signal confidence: weakweighed across independent studies, places & mapped detections

Where its DNA was found

0 of 2 detections have coordinates

Open the map1 country0

Soil sandy. Growing flat in beach dunes.

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 median16.2 °C 16.2–16.2

Seasonal swing summer↔winter6.10 °C

Max temp (day)18.0 °C

Min temp (night)14.4 °C

Precipitation3.50 mm/mo

Air humidity65.5 %

Vapour deficit631 Pa

Cloud cover27.0 %

CHELSA 1981–2010, ~9 km grid, at location & month of 1 detection point · 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.