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Rhododendron Research Network

Online Resources for Rhododendron Studies

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Jump to:  Rhododendron-specific Databases, General Plant Databases, Molecular Databases, Plant Trait Databases, Plant Image Galleries, Online Floras, Living Collections, DNA Banks, Seed Banks, Tissue Banks, Taxonomy, Online Herbarium Collections, Career Opportunities, Research Funding Resources

● Rhododendron-specific species / hybrids databases:

American Rhododendron Society (ARS) Plant Database

Searchable database of rhododendrons and azaleas species and hybrids that contains information on flower color, flower/truss description, fragrance, bloom time, foliage description, plant habit, height, cold hardiness temp, elepidote or lepidote, subgenus, section, subsection, and geographical origin as well as a truss photo.

Vireya Rhododendrons

The website includes a gallery that holds ~1000 images of vireyas, an archive with over 50 selected works on vireya culture and comprehensive listings of named hybrids, a species database, and information on the history, distribution, classification and cultivation of vireya rhododendrons.

Danish Chapter of the ARS

A great resource for photos of Rhododendron taxa, as well as species information. In Danish and English.

Edinburgh Rhododendron Monographs

Species, subspecies and variety descriptions along with notes on distribution, habitat, and nomenclature for about 1,000 Rhododendron species.

German Genebank Rhododendron

A searchable database with descriptions for all Rhododendron species and hybrids that exist in botanical gardens, state and public establishments, and private gardens in Germany. In German.

The Rhododendron, Camellia & Magnolia Group

The RHS Rhododendron Group website has lists of species and hybrids, hardy varieties, RHS Award of Garden Merit selections, top 100 Rhododendrons, Azalea species and hybrids and Vireyas.  Also download the The International Rhododendron Register and Checklist, Second Edition 2004

Hirsutum.info: About Rhododendrons, Azaleas, and Vireyas; a virtual arboretum

Very large searchable collection of rhododendron photo images, donated by ARS members and others. Website is currently not functioning.

Western North American Rhododendron Species Project (WNARSP)

The Project's mission is to research and identify all locations of the indigenous Rhododendron species of the western United States and Canada and create a computerized archive of the information.

● General plant databases with species information and images:

Burke Herbarium Image Collection

The image collection provides photographs and information for vascular plants, macrofungi, and lichenized fungi of Washington state, including distribution maps, species descriptions, and synonymy.

Calflora Plant Database

Calflora provides species information, distribution maps, and images for California plants.

Encyclopedia of Life (EOL)

EOL provides species information, maps, and images for all life on Earth.

Lady Bird Johnson Wildflower Center

U. Texas website provides images and information on species native to North America, including plant characteristics, bloom information, distribution, growing conditions, value to beneficial insects, propagation, and where to acquire species.

NatureServe Explorer

NatureServe Explorer provides conservation status, taxonomy, distribution, and life history information for more than 70,000 plants, animals, and ecological communities and systems in the United States and Canada.

United States Department of Agriculture (USDA) PLANTS Database

The PLANTS Database provides standardized information about vascular plants, mosses, liverworts, hornworts, and lichens of the U.S. and its territories, including general information, distribution maps, images, synonyms, classification, legal status, and wetland status.

● Molecular databases:

National Center for Biotechnology Information (NCBI)

NCBI maintains databases for nucleotide and protein sequences deposited from all organisms.

DNA Data Bank of Japan (DDBJ)

DDBJ maintains databases for nucleotide sequences deposited from all organisms.

European Molecular Biology Laboratory – European Bioinformatics Institute (EMBL-EBI)

EMBL-EBI maintains databases for nucleotide and protein sequences deposited from all organisms.

Chinese Academy of Sciences Rhododendron Plant Genome Database (RPGD)

Comprehensive database for Rhododendron that integrates large amounts of omics data, including genome assemblies, gene expression profiles derived from published RNA-Seq data, functional annotation, gene family, transcription factor, homolog gene information, simple sequence repeat and chloroplast genome assemblies.

Rhododendron Genome Integrative Explorer from Beijing Forestry University

Tools for using the Rhododendron simsii genome and transcriptome.

● Specific plant trait databases:

Chromosome Counts Database (CCDB)

Comprehensive community resource for plant chromosome numbers.

Index to Plant Chromosome Numbers (IPCN)

IPCN provides gametophytic and/or sporophytic counts of chromosomes from published chromosome reports on plants.

Plant DNA C-values Database

DNA amount in the unreplicated gametic nucleus of an organism is referred to as its C-value. Available reports for genome size according to C-value can be found here.

TRY Plant Trait Database

Database includes a variety of plant trait data, which can be obtained upon request.

● Plant image galleries:


CalPhotos is a collection of photos of plants, animals, fossils, people, and landscapes from around the world.

● Online floras:

Electronic Atlas of the Flora of British Columbia

Flora of China

Flora of North America

Flora of Pakistan

Jepson eFlora, Flora of California

World Flora Online

● Living collections:

The Arboretum and Botanical Garden, University of Bergen, Norway

Botanic Gardens Conservation International (BGCI)

Kristian Theqvist RhodoGarden

An extensively documented private collection in Finland.

Polar Alpine Botanical Garden (PABGI)

Garden located in Russia above the arctic circle that features a collection of Rhododendron species.
PABGI collection information: https://journals.rbge.org.uk/rbgesib/article/view/304

Rhododendron Species Botanical Garden

Royal Botanic Garden Edinburgh (RBGE)

U. California Botanical Garden

Visit Rhododendron Gardens and Parks Around the World

● DNA banks:

Integrated Digitized Biocollections (iDigBio)

iDigBio is actively compiling a list of DNA banking facilities and genetic resources repositories in the United States that maintain collections of nucleic acid extracts (DNA or RNA) or preserved tissues suitable for genetic and genomic studies of biodiversity.

New York Botanical Garden Steere Herbarium

The Botanical Garden’s DNA Bank is a centralized repository of frozen plant, algal, and fungal tissue and extracted DNA.

Royal Botanic Gardens Kew DNA Bank

The Kew DNA and Tissue Collection contains samples of plant genomic DNA and silica dried tissue samples.

● Seed banks:

Botanic Gardens Conservation International (BGCI)

Search collection records to locate threatened, rare, medicinal and other plant species in living collections

Royal Botanic Gardens Kew Millennium Seed Bank

Unites States Department of Agriculture (USDA) Germplasm Resources Information Network (GRIN

● Tissue banks:

Botanic Gardens Conservation International (BGCI)

Integrated Digitized Biocollections (iDigBio)

iDigBio is actively compiling a list of DNA banking facilities and genetic resources repositories in the United States that maintain collections of nucleic acid extracts (DNA or RNA) or preserved tissues suitable for genetic and genomic studies of biodiversity.

Missouri Botanical Garden

New York Botanical Garden Steere Herbarium

● Taxonomy:

Catalogue of Life

The Catalogue of Life is the most comprehensive and authoritative global index of species. Search Annual Checklist for accepted names and synonyms.

International Plant Names Index (IPNI)

IPNI provides nomenclatural information (spelling, author, types and first place and date of publication) for the scientific names of Vascular Plants from Family down to infraspecific ranks.

Integrated Taxonomic Information System (ITIS)

ITIS provides authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.

The Plant List

The Plant List provides the Accepted Latin name for most species, with links to all Synonyms by which that species has been known.

World Flora Online

An online flora of all known plants.

● Online herbarium collections:

Australasian Virtual Herbarium

Biodiversity of the Hengduan Mountains

Consortium of California Herbaria

Consortium of Pacific Northwest Herbaria

Fairchild Tropical Botanic Garden Virtual Herbarium

Fairchild Tropical Botanic Garden Virtual Herbarium (Other Herbariums)

Global Biodiversity Information Facility (GBIF)

Harvard University Herbaria

Integrated Digitized Biocollections (iDigBio)

JSTOR Global Plants

New York Botanical Garden C. V. Starr Virtual Herbarium

Royal Botanic Garden Edinburgh (RBGE)

Royal Botanic Gardens Kew Herbarium

SEINet Network of North American Plant Herbaria (Arizona-New Mexico)

Singapore Herbarium

SouthEast Regional Network of Expertise and Collections (SERNEC)

Symbiota Portals

● Research career opportunities:

American Public Gardens Association Career Center

American Society of Plant Taxonomists Job Postings

Botanical Society of America Job Board

Ecological Society of America Jobs Listing

Evolution Directory Jobs

Society of Herbarium Curators Jobs

The Society for the Preservation of Natural History Collections Jobs

● Rhododendron research funding resources:

American Rhododendron Society Research Grants

American Society of Plant Taxonomists:
    Engagement and Excellence in Plant Systematics Education Award
    Graduate Student Research Grants
   Undergraduate Research Prize
   Botanical Advocacy and Service Grant

Botanical Society of America Awards

Ecological Society of America awards

Society of Herbarium Curators Student Research Awards

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Website: www.rhododendron.org
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