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Record W7119238691

Asteraceae: Erigeron canadensis

2025· article· W7119238691 on OpenAlex
R. Neil Reese

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

aboutThe title or abstract carries a Canadian signal from the geographic lexicon.
no affNo Canadian affiliation: this work is invisible to an affiliation-only frame.
No Canadian affiliation. An affiliation-only frame, the usual design, would never have seen this work. It is one of the works that make the case for inverting the frame.

Bibliographic record

VenueOpen PRAIRIE (South Dakota State University) · 2025
Typearticle
Language
FieldBiochemistry, Genetics and Molecular Biology
TopicSesquiterpenes and Asteraceae Studies
Canadian institutionsnot available
Fundersnot available
KeywordsAcheneBractInflorescenceStamenBristleAsteraceaeThistleReceptacle
DOInot available

Abstract

fetched live from OpenAlex

Erigeron canadensis is a fast-growing, annual or short-lived perennial herb growing from a fibrous root system, with slender stems that are typically 30 to 150 tall, erect, branched, and often sparsely hairy to nearly glabrous. Leaves are alternate, narrowly lanceolate to linear, measuring 2 to 10 cm long and 0.5 to 1.5 cm wide, with short petioles or sessile bases and finely serrate to entire margins. Flowering occurs from late summer to fall (July–October), producing open, branching panicles of numerous small flower heads . Each flower head is about 1–2 cm across, with 40–100 white to pale lavender ray florets, 2 to 4 mm long, surrounding yellow disc florets. Flowers are bisexual, with five-lobed corollas, 5 stamens fused by their anthers into a tube surrounding the style, and a single pistil with a slender style bifurcated at the tip into two slender, elongated stigmatic branches. The involucre is composed of several series (3 to 4 rows) of narrow, greenish to pale bracts (phyllaries) that are lanceolate and often slightly membranous with finely fringed or ciliate margins, forming a cup-shaped structure surrounding the base of the composite flower head. The fruit is a small, ribbed achene about 1 to 2 millimeters long with a pappus of fine bristles aiding wind dispersal. Seeds mature in early fall. Canadian horseweed is native to North America and widespread throughout South Dakota, commonly found in disturbed sites, roadsides, fields, and open areas.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesMeta-epidemiology (narrow)
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Not applicable · Consensus signal: Not applicable
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.430
Threshold uncertainty score0.999

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0010.001
Meta-epidemiology (broad)0.0010.000
Bibliometrics0.0000.001
Science and technology studies0.0010.000
Scholarly communication0.0010.000
Open science0.0020.004
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.012
GPT teacher head0.248
Teacher spread0.237 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it