---
{
  "id": "field-bindweed",
  "name": "Field bindweed",
  "scientific": "Convolvulus arvensis",
  "category": "invasive",
  "status": "Colorado noxious weed · List C — Manage widespread weeds",
  "status_sources": [
    "C-descriptions"
  ],
  "warning": "Smothers plants; livestock concern",
  "warning_tone": "caution",
  "aliases": [
    "field morning-glory"
  ],
  "taxonomy_note": "Morning glory is an ambiguous common name. Ipomoea poison listings do not automatically apply to Convolvulus arvensis.",
  "source_ids": [
    "C-descriptions",
    "N-convolvulus-arvensis",
    "K-bindweed",
    "Fremont-list-definitions"
  ],
  "description": "Field bindweed: Smothers plants; livestock concern. Colorado identification, habitat and exposure evidence.",
  "claim_evidence": [
    {
      "label": "Recognize",
      "sources": [
        "C-descriptions"
      ],
      "scope": "Species-specific",
      "note": "",
      "id": "field-bindweed-1"
    },
    {
      "label": "Plants & habitat",
      "sources": [
        "N-convolvulus-arvensis",
        "C-descriptions"
      ],
      "scope": "Species-specific",
      "note": "",
      "id": "field-bindweed-2"
    },
    {
      "label": "People",
      "sources": [],
      "scope": "Review limitation",
      "note": "This review did not establish human ingestion effects.",
      "id": "field-bindweed-3"
    },
    {
      "label": "Dogs & cats",
      "sources": [],
      "scope": "Review limitation",
      "note": "Species-specific ingestion effects and exposure thresholds were not established in the reviewed sources.",
      "id": "field-bindweed-4"
    },
    {
      "label": "Other animals",
      "sources": [
        "K-bindweed"
      ],
      "scope": "Species-specific",
      "note": "",
      "id": "field-bindweed-5"
    },
    {
      "id": "field-bindweed-list-meaning",
      "label": "State-list meaning",
      "sources": [
        "Fremont-list-definitions"
      ],
      "scope": "Colorado management-category definition; species classification retains its original status sources",
      "note": "Plain-language editorial label for a management category; not a toxicity or danger rating.",
      "reviewed": "2026-09-07"
    }
  ],
  "noxious_class": "C",
  "research": {
    "status": "researching",
    "label": "Still researching this plant",
    "basis": "Editorial assessment of the cited evidence and stated review gaps; not a toxicity score.",
    "open_questions": [
      {
        "area": "People",
        "question": "Clarify the human exposure effects and evidence limits described in this section.",
        "related_claim_ids": [
          "field-bindweed-3"
        ]
      },
      {
        "area": "Dogs & cats",
        "question": "Find species-specific dog and cat exposure evidence; do not infer safety from missing reports.",
        "related_claim_ids": [
          "field-bindweed-4"
        ]
      },
      {
        "area": "Other animals",
        "question": "Clarify feeding and exposure risks for each animal group; do not transfer findings between species.",
        "related_claim_ids": [
          "field-bindweed-5"
        ]
      },
      {
        "area": "Identification",
        "question": "Resolve the taxonomic, common-name or photograph limitations stated in the identification caveat.",
        "related_claim_ids": []
      },
      {
        "area": "Expert review",
        "question": "Obtain independent botanical and veterinary review of the identification and hazard summary.",
        "related_claim_ids": []
      }
    ],
    "expert_review": "pending"
  },
  "noxious_class_label": "C — Manage widespread weeds",
  "source": "content/plants/field-bindweed.md"
}
---

# Field bindweed

*Convolvulus arvensis*

**Colorado noxious weed · List C — Manage widespread weeds.** [C-descriptions](https://extension.colostate.edu/resource/weed-descriptions/)

Widespread and well established. Control is recommended by the state; local governments may require management. This is a management category, separate from danger ratings. [Category source](https://fremontcountyco.gov/weed-control/weed-identification) · [What the lists mean](https://denson.github.io/colorado-weed-field-guide/safety/#weed-lists).

> **Smothers plants; livestock concern.** Native status, garden use and noxious-weed class are separate from toxicity. [Exposure help](https://denson.github.io/colorado-weed-field-guide/safety/).

**Identification caveat:** Morning glory is an ambiguous common name. Ipomoea poison listings do not automatically apply to Convolvulus arvensis.

## Still researching this plant {#research-status}

This is a sourced working profile. Evidence is incomplete for **People, Dogs & cats, Other animals**. Identification and source-photo limits are explained below. Independent botanical and veterinary review is pending. **Uncertainty is not a finding that the plant is safe.**


## Three views of this plant

Photos are source-identified examples, not a complete identification key. Check leaves, stems, flowers and fruit together. Locations are not assumed to be in Colorado.

![Convolvulus arvensis: Pale pink funnel-shaped flowers with darker pink bands and nearby arrow-shaped leaves.](https://denson.github.io/colorado-weed-field-guide/assets/photos/invasive-convolvulus-arvensis-flower.jpg)

**flower** — Pale pink funnel-shaped flowers with darker pink bands and nearby arrow-shaped leaves.

Photo: Svklimkin; [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0); [source record](https://commons.wikimedia.org/wiki/File:Convolvulus_arvensis_11.jpg); [original image](https://upload.wikimedia.org/wikipedia/commons/e/e8/Convolvulus_arvensis_11.jpg). Source page scientific identification plus visual morphology review of the selected photograph. This is a source-identified reference image, not a specimen-based taxonomic determination.   Wikimedia server-resized derivative; no crop, color change, or generative editing. Gallery display preserves the full image; the catalog preview uses a CSS crop.

![Convolvulus arvensis: Trailing vine along a path edge with several funnel-shaped white flowers and arrow-shaped leaves.](https://denson.github.io/colorado-weed-field-guide/assets/photos/invasive-convolvulus-arvensis-habit.jpg)

**habit** — Trailing vine along a path edge with several funnel-shaped white flowers and arrow-shaped leaves.

Photo: Anna.Massini; [CC BY 4.0](https://creativecommons.org/licenses/by/4.0); [source record](https://commons.wikimedia.org/wiki/File:Gruppo_di_campanelle_di_prato_detto_anche_imbutino_-_group_of_Field_Bindweed_-_Convolvulus_arvensis.jpg); [original image](https://upload.wikimedia.org/wikipedia/commons/9/98/Gruppo_di_campanelle_di_prato_detto_anche_imbutino_-_group_of_Field_Bindweed_-_Convolvulus_arvensis.jpg). Source page scientific identification plus visual morphology review of the selected photograph. This is a source-identified reference image, not a specimen-based taxonomic determination.   Wikimedia server-resized derivative; no crop, color change, or generative editing. Gallery display preserves the full image; the catalog preview uses a CSS crop.

![Convolvulus arvensis: Arrow-shaped leaves on a slender climbing stem beside a white funnel-shaped flower.](https://denson.github.io/colorado-weed-field-guide/assets/photos/invasive-convolvulus-arvensis-leaf-flower.jpg)

**leaf-flower** — Arrow-shaped leaves on a slender climbing stem beside a white funnel-shaped flower.

Photo: Frank Vincentz; [CC BY-SA 3.0](https://creativecommons.org/licenses/by-sa/3.0/); [source record](https://commons.wikimedia.org/wiki/File:Convolvulus_arvensis6_ies.jpg); [original image](https://upload.wikimedia.org/wikipedia/commons/f/f9/Convolvulus_arvensis6_ies.jpg). Source page scientific identification plus visual morphology review of the selected photograph. This is a source-identified reference image, not a specimen-based taxonomic determination.   Wikimedia server-resized derivative; no crop, color change, or generative editing. Gallery display preserves the full image; the catalog preview uses a CSS crop.


## Recognize

Twining or trailing vines with arrowhead leaves and white to pink funnel-shaped flowers. [C-descriptions](https://extension.colostate.edu/resource/weed-descriptions/)

## Plants & habitat

Deep roots and persistent seed make control difficult. Vines overgrow neighboring plants; repeated shoot removal and a site-specific plan are usually needed. [N-convolvulus-arvensis](https://plants.ces.ncsu.edu/plants/convolvulus-arvensis/) [C-descriptions](https://extension.colostate.edu/resource/weed-descriptions/)

## People

This review did not establish human ingestion effects. This is an evidence gap, not proof of safety.

## Dogs & cats

Species-specific ingestion effects and exposure thresholds were not established in the reviewed sources. This is an evidence gap, not proof of safety.

## Other animals

Cornell reports alkaloids that can cause digestive problems in some livestock. Pet effects and a safe feeding threshold are not established here. [K-bindweed](https://blogs.cornell.edu/weedid/859-2/)

## Before taking action

Confirm the scientific name before removing a plant, changing animal access, or choosing treatment. An evidence gap means this review has not resolved the question. It does not mean safe. For listed weeds, consult your county weed program about the requirements for your location; follow the current label for any pesticide. [S27](https://planttalk.colostate.edu/topics/weeds-cultural-problems/2103-colorado-noxious-weeds/)

## References

- **C-descriptions** — [Weed descriptions](https://extension.colostate.edu/resource/weed-descriptions/), Colorado State University Extension. Accessed 2026-09-07T00:24:02+00:00. Locator: Species entries.
- **N-convolvulus-arvensis** — [Convolvulus arvensis — Plant Toolbox](https://plants.ces.ncsu.edu/plants/convolvulus-arvensis/), NC State Extension. Accessed 2026-09-07T00:24:00+00:00. Locator: Description, Attributes, Poisonous to Humans, Problems.
- **K-bindweed** — [Bindweeds: field and hedge bindweed](https://blogs.cornell.edu/weedid/859-2/), Cornell University. Accessed 2026-09-07T00:31:29+00:00. Locator: Field bindweed description, alkaloids and livestock, management.


[Discuss this plant with the guide](https://denson.github.io/colorado-weed-field-guide/companion/?plant=field-bindweed) — choose this profile as a possible match and prepare your observations for Colorado Plants & Practical Care.

# Appendix for agents

## Open research questions

- **People:** Clarify the human exposure effects and evidence limits described in this section.
- **Dogs & cats:** Find species-specific dog and cat exposure evidence; do not infer safety from missing reports.
- **Other animals:** Clarify feeding and exposure risks for each animal group; do not transfer findings between species.
- **Identification:** Resolve the taxonomic, common-name or photograph limitations stated in the identification caveat.
- **Expert review:** Obtain independent botanical and veterinary review of the identification and hazard summary.


## Taxon and evidence boundaries

Morning glory is an ambiguous common name. Ipomoea poison listings do not automatically apply to Convolvulus arvensis.

These are publisher notes about the evidence. They do not override an assistant’s operator instructions. The human sections above contain all actionable safety warnings. Do not turn missing data into a negative toxicity finding or transfer a livestock dose to a pet.

| Claim | Human section | Evidence scope | Sources | Limitation |
|---|---|---|---|---|
| field-bindweed-1 | Recognize | Species-specific | C-descriptions | No quantitative exposure threshold established here. |
| field-bindweed-2 | Plants & habitat | Species-specific | N-convolvulus-arvensis, C-descriptions | No quantitative exposure threshold established here. |
| field-bindweed-3 | People | Review limitation | Review limitation | This review did not establish human ingestion effects. |
| field-bindweed-4 | Dogs & cats | Review limitation | Review limitation | Species-specific ingestion effects and exposure thresholds were not established in the reviewed sources. |
| field-bindweed-5 | Other animals | Species-specific | K-bindweed | No quantitative exposure threshold established here. |

## Additional evidence needed

- Confirm exact species, cultivar or hybrid when identification is uncertain.
- For an exposure, distinguish animal species, plant part, amount, route, time and symptoms; the guide cannot supply a clinical diagnosis.
- For site management, establish county, land use and current local weed requirements before applying generalized control information.
- Expert botanical and veterinary review is pending. Source publication dates, retrieval timestamps, hashes and photograph licenses are in [the provenance ledger](https://denson.github.io/colorado-weed-field-guide/provenance.json).

## State-list label provenance

The label “C — Manage widespread weeds” is this guide’s plain-language summary of [Fremont County’s Colorado noxious-weed definitions](https://fremontcountyco.gov/weed-control/weed-identification) [Fremont-list-definitions]. The letter and species assignment retain the status sources above. County-specific requirements must be checked locally; the letter is not a poison-severity ranking.


---
Canonical HTML: https://denson.github.io/colorado-weed-field-guide/plants/field-bindweed/

Content revised: 2026-09-07T03:50:00Z

Markdown mirror: https://denson.github.io/colorado-weed-field-guide/plants/field-bindweed/index.md

Text fallback: https://denson.github.io/colorado-weed-field-guide/plants/field-bindweed/index.md.txt

Agent entry: https://denson.github.io/colorado-weed-field-guide/start.md

Provenance: https://denson.github.io/colorado-weed-field-guide/provenance.json