Marie-Victorin Herbarium (MT) - Plantes vasculaires

Latest version published by Université de Montréal Biodiversity Centre on 19 June 2023 Université de Montréal Biodiversity Centre
Publication date:
19 June 2023
CC0 1.0

Download the latest version of this resource data as a Darwin Core Archive (DwC-A) or the resource metadata as EML or RTF:

Data as a DwC-A file download 199,423 records in English (26 MB) - Update frequency: unknown
Metadata as an EML file download in English (19 KB)
Metadata as an RTF file download in English (15 KB)


The Marie-Victorin Herbarium (MT) is the second largest university herbarium in Quebec, and ranks fourth among all Canadian herbaria. It includes about 680,000+ vascular plants. Half of the material is Canadian, but representation is global. Recently, the WAT herbarium was acquired and is now incorporated within MT, though specimens are still to be cited with the WAT acronym. The MT and WAT datasets are individually shown in the dataset, though they all belong to MT. The current dataset includes the 164,000+ digitized specimens from the collection.

Data Records

The data in this occurrence resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 199,423 records.

2 extension data tables also exist. An extension record supplies extra information about a core record. The number of records in each extension data table is illustrated below.

Occurrence (core)

This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.


The table below shows only published versions of the resource that are publicly accessible.

How to cite

Researchers should cite this work as follows:

Marie-Victorin Herbarium (MT) from University of Montreal Biodiversity Centre. http://dx.doi.org/10.5886/rzav8bu2 (accessed on [date]).


Researchers should respect the following rights statement:

The publisher and rights holder of this work is Université de Montréal Biodiversity Centre. To the extent possible under law, the publisher has waived all rights to these data and has dedicated them to the Public Domain (CC0 1.0). Users may copy, modify, distribute and use the work, including for commercial purposes, without restriction.

GBIF Registration

This resource has been registered with GBIF, and assigned the following GBIF UUID: 0348540a-e644-4496-89d3-c257da9ad776.  Université de Montréal Biodiversity Centre publishes this resource, and is itself registered in GBIF as a data publisher endorsed by Canada Biodiversity Information Facility.


MT; Marie-Victorin Herbarium; Herbier Marie-Victorin; Université de Montréal; WAT; SBL; Canadensys; Canada; Quebec; collection; herbarium; specimens; Vascular plants; Occurrence; Specimen; observation

External data

The resource data is also available in other formats


Luc Brouillet
  • Point Of Contact
Université de Montréal Biodiversity Centre
4101 rue Sherbrooke est
H1X2B2 Montreal
Carole Sinou
  • Metadata Provider
Biodiversity Informatics Manager
Université de Montréal Biodiversity Centre
4101 rue Sherbrooke est
H1X2B2 Montreal
Luc Brouillet
  • Point Of Contact
Former curator
Université de Montréal Biodiversity Centre
4101 rue Sherbrooke est
H1X2B2 Montreal
Étienne Léveillé-Bourret
  • Curator
  • Point Of Contact
Université de Montréal Biodiversity Centre
4101 rue Sherbrooke est
H1X2B2 Montreal
Geoffrey Hall
  • Custodian Steward
Collection manager
Université de Montréal Biodiversity Centre
4101 rue Sherbrooke est
H1X2B2 Montreal

Geographic Coverage

Global terrestrial coverage (except Antartica). Over 88% of the specimens in this dataset are collected in Canada, of which 70% in the province Quebec and 19.5% in Newfoundland. 5% of the specimens are from the United States and 3.5% from Cuba. For more detailed information about the whole collection, see our inventory at http://dataset.canadensys.net/mt-inventory.

Bounding Coordinates South West [-90, -180], North East [90, 180]

Taxonomic Coverage

This dataset includes all digitized vascular plants and bryophytes in the collection. The top 3 families are Cyperaceae (15%), Asteraceae (9%) and Poaceae (5%). For more detailed information about the whole collection, see our inventory at https://data.canadensys.net/ipt/resource?r=mt-inventory

Kingdom Plantae (Plants)
Class Equisetopsida (Terrestrial plants)
Subclass Lycopodiidae (Lycopods), Psilotidae, Ophioglossidae, Marattiidae, Polypodiidae (Ferns), Equisetidae (Horsetails), Cycadidae (Cycads), Ginkgoideae (Ginkgo), Gnetidae, Pinidae (Conifers), Magnoliidae (Angiosperms)

Temporal Coverage

Formation Period 1920-present

Sampling Methods

Originally, data were manually digitized as text from specimen labels, without photography. Currently, digitization still occurs as before for specific projects, but a new process based on specimen photography has been initiated, with the aim of increasing the pace of data capture. The process is: minimal digitization of specimen, photography (photos stored on photo server accessible via URL address), publication of minimally digitized data with photo. This will be followed eventually by full digitization either of targeted collections or via crowd sourcing (in development). All specimens newly acquired by MT and returned loans are digitized (when data are not provided by donor; MT encourages donors to provide digital data used to generate labels) and photographed.

Study Extent Digitization and photography of vascular plant specimens from the Marie-Victorin Herbarium (MT, including WAT)
Quality Control Initially, legacy data had been formatted to fit the new database structure and cleaned as well as possible, though they still contain inconsistencies. They are being corrected both opportunistically and in a systematic manner for determinations and geography data. Inaccurate georeferenced data are currently being corrected. New records are entered using controlled vocabularies where relevant and should contain fewer errors. Data from donations are processed via a workbench and compared with the controlled vocabularies to ensure consistency. Specimens are validated by a taxonomist before databasing to ensure identification accuracy.

Method step description:

  1. Examine specimen and annotations labels. Verify and update determination if qualified. Search specimen record in collection database and update where necessary, or create new record and populate fields with the information on the specimen label. Use controlled vocabularies where relevant. Determinations are recorded in a related table (included in this dataset as http://rs.gbif.org/extension/dwc/identification.xml), as are related projects and specimen exchange history.
  2. Verify locality provided on specimen labels with online databases to ensure quality of geographic data. Georeferences provided on labels are validated using online maps and GIS tools and corrected at need, with the addition of a measure of inaccuracy.
  3. Print the newly generated specimen number onto the physical specimen, to be used as reference to the datase and as accession number in the collection.

Collection Data

Collection Name Marie-Victorin Herbarium
Collection Identifier MT
Parent Collection Identifier MT
Collection Name University of Waterloo Herbarium
Collection Identifier WAT
Specimen preservation methods Mounted

Additional Metadata

Alternative Identifiers 0348540a-e644-4496-89d3-c257da9ad776