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Hymenoxys helenioides

species of plant

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Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionDec 27, 2025
Entity authorityQ15588255 ↗
Source-derived summary

Hymenoxys helenioides is a North American species of flowering plant in the daisy family known by the common name intermountain rubberweed. It is native to Arizona, Utah, Colorado, and New Mexico in the western United States.

Hymenoxys helenioides is a perennial herb up to 50 cm (20 in) tall. One plant generally produces as many as 50 flower heads. Each head has 10–16 ray flowers and 50–150 disc flowers.

Taxonomy

In 1904 Hymenoxys helenioides was scientifically described and named by Theodore D. A. Cockerell. It is classified in the genus Hymenoxys within the family Asteraceae. It has no subspecies and has three heterotypic synonyms.

Range

According to Plants of the World Online, intermountain rubberweed is native to just three western states; Colorado, Utah, and Arizona. However, according to the Natural Resources Conservation Service it also grows in San Juan County, New Mexico and Clark County, Nevada, though nowhere else in these states.

Editorial summary

Begin with the source’s own compact description: “Hymenoxys helenioides” is species of plant. The dossier treats that line as a proposition to test through Hymenoxys, helenioides and species, not as a finished interpretation.

Editorial reviewA sound reference starting point where classification, measurement and the date of the underlying evidence remain visible. The current lead gives the account dated anchors—1904—that can be checked directly. The selected authority fields contribute no independent date. For this dossier, Hymenoxys, helenioides and species is the immediate research focus.
Editorial analysis

Why this record matters

The phrase “species of plant” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.

Evidence profile

Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated Dec 27, 2025. The linked authority identifier is Q15588255. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1904.

Critical limits

Scientific names, classifications and consensus can change while older terminology persists in catalogues and historical literature. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Check terminology, classification and the date of the cited evidence. Scientific names and technical consensus can change while older records retain historical value.

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Primary datasets, specimen catalogues, standards bodies and the most recent peer-reviewed literature.

Three-step research path

  1. Establish the record: confirm the title “Hymenoxys helenioides”, its source revision and the description used here.
  2. Expand the search: follow Hymenoxys helenioides primary sources, Hymenoxys helenioides archive and Hymenoxys research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

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  2. Is the terminology current, historical or disputed?
  3. Which observation, specimen, dataset or publication supports the account?
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Source & attribution

This entry incorporates text from “Hymenoxys helenioides” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.