Molecular data
Quercus porphyrogenita on GenBank NCBI
Online Plant Databases
Quercus porphyrogenita on EFLORAS
Quercus porphyrogenita on Encyclopedia of Life
Quercus porphyrogenita on ePIC RBG Kew
Quercus porphyrogenita on GBIF
Quercus porphyrogenita on IPNI
Quercus porphyrogenita on The Plant List
Quercus porphyrogenita in the online Kew Herbarium Catalogue
Quercus porphyrogenita in the online MNHN Paris Herbarium Catalogue
Quercus porphyrogenita in the online Naturalis Leiden Herbarium Catalogue
Quercus porphyrogenita on Tropicos
Quercus porphyrogenita on Wikispecies
Quercus porphyrogenita on JSTOR Global Plants
Quercus porphyrogenita on EUROPEANA Collections
Scanned TYPES
TYPES of Quercus porphyrogenita on JSTOR Global Plants
TYPES of Quercus porphyrogenita on Kew Herbarium Catalogue
TYPES of Quercus porphyrogenita on MNHN Paris
Search for TYPES of Quercus porphyrogenita in the online Naturalis Leiden Herbarium Catalogue
Images
Quercus porphyrogenita on Google Image Search
Online libraries
Quercus porphyrogenita in Biodiversity Heritage Library
Search for Quercus porphyrogenita on Botanicus.org
Scientific literature (ongoing)