Diario del proyecto Malva Genus (Mallows) - California

14 de junio de 2024

Misidentification of Malva observations in CA - Part 2

This is a continuation of the study of Malva misidentifications in California starting in May 2021. You can read the initial report here.

I'm continuing to monitor and analyze Malva IDs in iNaturalist because there is still a high rate of misidentifications (29% to date). By correcting the errors and providing references for proper identification, I'm hoping the rate of errors can be significantly reduced.

MisIDs-2024-06-14
MisIDs-2024-06-14-Part2

While doing this work, I've made the following observations:

  • 13,601 Malva observations have been identified to species. Of these, 4,000 have been misidentified in CA to date.
  • In addition, there are 5,939 Malva observations that are foliage-only (i.e., showing no flowers or fruits). Many of these were incorrectly given a species designation. It is my understanding that foliage-only Malva observations should not be ID'd to species (except M. assurgentiflora, M. arborea, and M. subovata), so I've reverted them to genus level and marked them "No, it's as good as can be" so they'd become Research Grade and get removed from the queue.
  • There are still 6,335 observations that need to be confirmed (by someone other than me because I've already reviewed them). I've identified 16,605 Malva observations to date.
  • The "Other Errors" category includes missing dates, user opting out of community review (and misidentifying the observation), duplicate observations, and multiple species included in one observation.
  • The iNaturalist Computer Vision algorithm is now much more accurate in suggesting Malva species, which will hopefully decrease the number of misidentifications in the future.

Here is a time slice analysis of Malva IDs and misidentifications. I'm still working through the backlog of observations that need confirmation, so this is a work in progress:
TimeSlice-2024-06-14

Here is a Google sheet with the data.

Publicado el junio 14, 2024 12:34 TARDE por truthseqr truthseqr | 7 comentarios | Deja un comentario

03 de enero de 2024

Misidentification of Malva observations in CA

I started this project in May 2021 because I noticed numerous misidentifications in iNaturalist for species in the Malva genus. Also, I was frustrated because the iNat Computer Vision (CV) algorithm was no help in figuring out the proper ID for most new Malva observations - it mostly suggested M. parviflora. Since the CV software was influenced by thousands of incorrect Malva IDs, the solution was to correct the misidentified observations. Now that thousands of the incorrect IDs have been corrected, the CV software is giving much more accurate species suggestions.

After working on this project for over two years, identifying 11,005 Malva observations in California, and reviewing countless others, I've summarized my findings as follows:

MisIDs-2024-01-15

Correct IDs: 7,218
Incorrect IDs: 3,663
Total ID'd to Species: 10,881
Total ID'd to Genus (No Flowers/Fruits): 3,969
Unconfirmed: 2,514

Actions I've taken:

  • Created this umbrella project and subprojects to manage the work.
  • Researched identification resources and shared them with other iNat users, especially when ID errors were found.
  • Reviewed nearly 17,000 Malva observations in California (both Research and Needs ID status) dating from 2007 to the present date.
  • Corrected errors I found during the review, including those that had been set to Research Grade by previous reviewers. Tagged Malva experts when discrepancies were found.
  • Collected metrics on misidentifications in Excel for reporting purposes.
  • This is a work in progress... There are still 2,514 observations that haven't been confirmed and more are added every day.

While doing this work, I've made the following observations:

  • In addition to the above errors, there are approximately 3,969 foliage-only observations of Malvas in iNat for California that had mostly been ID'd as M. parviflora. It is my understanding that foliage-only Malva observations should not be ID'd to species (except M. assurgentiflora, M. arborea, and M. subovata), so I reverted them to genus level and marked them "No, it's as good as can be" so they'd become Research Grade and get removed from the queue.
  • The majority of Malva observations in California have been ID'd as M. parviflora. Thousands of observations, including the foliage-only ones, had been reviewed and set to Research Grade, so the CV model was suggesting M. parviflora for almost all new Malva observations, which perpetuated the problem.
  • Almost all the M. sylvestris observations had been misidentified (most of them are actually M. multiflora). Hundreds of them had been reviewed and set to Research Grade, so I'm sure these errors were causing the CV model to suggest incorrect species. All these misidentifications have been corrected.
  • "Cretan Tree Mallow" was set as the common name for M. multiflora in iNat when I started this project. I'm guessing people thought it must be a tree like M. arborea, so they avoided using it. In May 2022, I contacted Tony Iwane and asked, "How are common names determined in iNaturalist?" Here was his reply; I followed his advice:

They're not "determined", really, they can be added by any user (go to a taxon's page, click on Taxonomy, scroll down and click on "Add a name"). Site curators and staff can edit the order of preference for common names. In this case, I'd recommend flagging the taxon and suggesting that "cretan mallow" be the default name for the taxon and explain why."

There seem to be a few errors in Jepson eFlora:

A project of this size cannot be managed alone. Many people have contributed their time and expertise to this effort:

Updated 2024-01-09. I missed about a thousand M. parviflora observations in southern CA in my first pass, which I'm still in the process of reviewing.
Updated 2024-01-14. Finished reviewing M. parviflora observations and made a second pass through all the M. nicaeensis observations. A large percentage were actually M. multiflora.

Publicado el enero 3, 2024 12:37 TARDE por truthseqr truthseqr | 20 comentarios | Deja un comentario

13 de junio de 2023

Malva Species Comparison

The following photos are from this excellent document (I’ve reordered the photos for ease of comparison):

A Guide to the Identification of Wild Mallows (by Jose Potter Butler [@joepb], William Reinders [@reinderw], April 2021).

Compare-1
Compare-2

  1. Malva parviflora (Cheeseweed Mallow)
  2. Malva neglecta (Dwarf Mallow)
  3. How to Identify Malva nicaeensis (Bull Mallow)
  4. How to Identify Malva multiflora (Cretan Mallow)
  5. Malva arborea (Tree Mallow)
  6. Malva subovata (Sea Mallow)
  7. Malva sylvestris (Common Mallow)
  8. Malva assurgentiflora (Island Mallow)

Updated 2024-04-10: added links to more info for each species.

Publicado el junio 13, 2023 03:57 TARDE por truthseqr truthseqr | 13 comentarios | Deja un comentario

Archivos