Floristique du genre Oenothera L., section Oenothera, sous-section Euoenothera (Onagraceae) en France
http://www.tandfonline.com/doi/pdf/10.1080/12538078.1994.10515234?needAccess=true

Il genere Oenothera L. subsect. Oenothera, in Italia (Onagraceae)
bot.biologia.unipi.it/chiavi/Oenothera_Soldano.pdf

Oenothera - Flora Nordica
http://www.floranordica.org/Review/-Review_public/accounts/Oenothera.html

Systematics of Oenothera Sect. Oenothera Subsect. Oenothera (Onagraceae)
https://repository.si.edu/handle/10088/9721

The genus Oenothera (Onagraceae) in Belgium
http://www.br.fgov.be/DUMORTIERA/DUM_106/Dum_106_12-42_Rostanski%20and%20Verloove_Oenothera.pdf

The species of Oenothera L. in Britain
http://archive.bsbi.org.uk/Wats14p1.pdf

Oenothera indecora (Onagraceae) a neophyte new to Italy
http://www.herbmedit.org/flora/23-087.pdf

https://www.researchgate.net/publication/229150974_DATOS_FOLIARES_DE_LAS_ESPECIES_E_HIBRIDOS_ALOCTONOS_DE_VIDES_GENERO_VITIS_EN_EL_TERRITORIO_VALENCIANO
https://dialnet.unirioja.es/descarga/articulo/1394799.pdf
https://www.researchgate.net/publication/261870535_A_taxonomic_survey_of_the_genus_Vitis_L_Vitaceae_in_Italy_with_special_reference_to_Elba_Island_Tuscan_Archipelago
https://www.researchgate.net/publication/281432534_A_taxonomic_survey_of_the_genus_Vitis_L_Vitaceae_in_Italy_part_II_The_%27Euro-_American%27_hybrids
https://www.researchgate.net/publication/280023770_Vitis_novae-angliae_Vitaceae_Systematics_distribution_and_history_of_an_illegal_alien_grape_in_Europe

WASHINGTONIA × FILIBUSTA (ARECACEAE: CORYPHOIDEAE), A NEW HYBRID FROM CULTIVATION
http://www.phytoneuron.net/2014Phytoneuron/68PhytoN-Washingtoniahybrid.pdf

Revisión Taxonómica de las Especies del Género Verbena (Verbenaceae). Serie Pachystachyae (2007)
https://archive.org/stream/cbarchive_105064_revisintaxonmicadelasespeciesd2007/revisintaxonmicadelasespeciesd2007#page/n1/mode/2up

Revisión Taxonómica de las Especies del Género Verbena (Verbenaceae). II Serie Verbena (2010)
https://www.biodiversitylibrary.org/item/123303#page/375/mode/1up

Taxonomic notes on Verbena bonariensis (Verbenaceae) and related species in the USA (2010)
http://www.phytoneuron.net/PhytoN-Verbbonariensis.pdf

A taxonomic revision of the genus Verbena L. (Verbenaceae) in Australia (2002)
https://data.environment.sa.gov.au/Content/Publications/JABG20P021_Munir.pdf

Verbena incompta (Verbenaceae), an overlooked xenophyte in Europe
http://www.bioone.org/doi/pdf/10.3372/wi.41.41104

Best wishes for happy holidays and happy new year to all who contributed to the project!

Not just every Lantana is Lantana camara.
This key by meant to provide a tool for the identification of all the Lantana species but could turn out to be particularly useful also for the species that succeed in escaping where they are cultivated:
http://www.coresci.org/lantana/

Some species that belong to the genus Prosopis (Fabaceae) have turned out to be important invaders in southeastern Mediterranean. Thus it is important to idstinguish the native species from those that are alien.

http://www.reabic.net/journals/bir/2017/1/BIR_2017_DufourDror_Shmida.pdf

Identifying tropical Prosopis species a field guide
https://www.gardenorganic.org.uk/sites/www.gardenorganic.org.uk/files/resources/international/IdentifyingProsopisGuide.pdf

The'Prosopis Juliflora'-'Prosopis Pallida'Complex A Monograph
https://www.gardenorganic.org.uk/sites/www.gardenorganic.org.uk/files/resources/international/ProsopisMonographMainText.pdf