Royal Horticultural Society
Cultivation and plant protection guides. Horticultural recommendations are read with attention to species and cultivation conditions.
Accessed 2026-10-08.
Atlas bibliography
Electronic sources
Botanical, university and horticultural portals used in the atlas.
27source portals
The [number-WWW] link beside a sentence opens the exact subpage on which the information is based. Each portal appears here once, with its homepage address and a permanent number.
Scientific articles, including those available electronically, remain in the literature list and are cited by author and year. They take precedence over guides and collectors' websites.
Plants of the World Online — Royal Botanic Gardens, Kew
Accepted names, synonyms and distribution. A citation beside a taxon leads to its record.
Accessed 2026-10-08.
International Plant Names Index
Authorship and publication of botanical names. A nomenclatural register does not determine acceptance of a taxon.
Accessed 2026-10-08.
Colorado State University Extension
https://extension.colostate.edu/
Regional CSU Extension and PlantTalk Colorado guides. Colorado conditions remain part of the recommendations' context.
Accessed 2026-10-08.
Massachusetts — Division of Fisheries and Wildlife
Official information on species and nature conservation, used for Opuntia cespitosa.
Accessed 2026-10-08.
Oklahoma State University Extension
https://extension.okstate.edu/
Materials on substrates, containers and hydroponics.
Accessed 2026-10-08.
Penn State Extension
University materials on mineral plant nutrition and hydroponic systems.
Accessed 2026-10-08.
Missouri Botanical Garden
A grammatical dictionary of botanical Latin by P. M. Eckel.
Accessed 2026-10-08.
University of California Integrated Pest Management
Identification of plant problems and principles of integrated pest management.
Accessed 2026-10-08.
Portal administracji publicznej — Ministerstwo Rolnictwa i Rozwoju Wsi
The official plant protection product search and links to current labels.
Accessed 2026-10-08.
Cactus Art
A horticultural and collector source. Used for names of cultivated forms and plant appearance, rather than to decide their taxonomic distinctness.
Accessed 2026-10-08.
Cactus DNA
A collector source on cultivated Astrophytum. Catalogue names require separate taxonomic assessment.
Accessed 2026-10-08.
NC State Extension Gardener Plant Toolbox
A university horticultural database used in describing Astrophytum.
Accessed 2026-10-08.
cactusinhabitat
https://www.cactusinhabitat.org/
Field documentation by G. Anceschi and A. Magli. Observations of Airampoa erectoclada from Catamarca were used, retaining the classification adopted separately from POWO.
Accessed 2026-10-08.
Iowa State University — Yard and Garden
https://yardandgarden.extension.iastate.edu/
University materials on plant lighting and supplemental lighting.
Accessed 2026-10-09.
List of Prokaryotic names with Standing in Nomenclature — DSMZ
Current bacterial names and synonyms.
Accessed 2026-10-09.
European and Mediterranean Plant Protection Organization — Global Database
Nomenclature and classification of organisms associated with plant health.
Accessed 2026-10-09.
South African National Biodiversity Institute — PlantZAfrica
Descriptions of southern African plants, habitats, propagation and cultivation.
Accessed 2026-10-09.
World Flora Online
https://www.worldfloraonline.org/
A global floristic database with nomenclature and morphological and habitat descriptions.
Accessed 2026-10-09.
Wyższa Szkoła Informatyki i Zarządzania z siedzibą w Rzeszowie
The official professional profile of the portal's author and a description of research by the Department of Biotechnology and Cell Biology.
Accessed 2026-10-09.
Société Nationale d’Horticulture de France
Botanical descriptions and cultivation guidance prepared by the French horticultural society. The Obregonia profile was used.
Accessed 2026-10-09.
U.S. Fish & Wildlife Service
Official data on species protection and current population status in the United States.
Accessed 2026-10-10.
Sistema de Información y Monitoreo de Biodiversidad — Ministerio del Medio Ambiente de Chile
Official profiles of Chilean species, their habitats, distribution and documented traits.
Accessed 2026-10-10.
Charles Darwin Foundation
https://www.darwinfoundation.org/
A scientific checklist of Galápagos organisms, with names, distribution and botanical literature.
Accessed 2026-10-10.
Cactus Conservation Institute
https://cactusconservation.org/
The institute provides scientific publications and field studies on cactus biology and conservation, including multi-year Lophophora observations.
Accessed 2026-10-10.
IUCN Red List of Threatened Species
Extinction risk assessments and documents on species conservation status. Citations identify the version and date of the specific assessment.
Accessed 2026-10-10.
Royal Botanic Gardens, Kew — repozytorium danych
Botanical datasets, including the World Checklist of Vascular Plants, with names, authorships, ranks and synonym relationships.
Accessed 2026-10-11.