Angelica pachycarpa is found growing in the Crithmo-Armerion maritimae (Géhu 1968) community of plants in Spain and Portugal which includes these species also: Armeria berlengensis, Armeria euscadiensis, Armeria maritima subsp.
Local flora is well represented with the Armeria of Roussillon (Armeria ruscinonensis Girard), the polycarpon of Catalonia (Polycarpon polycarpoides), the Thymelaea hirsuta, the Limonium tremolsii, and also Tamarix (Tamaricaceae), and Gattiliers (Vitex agnus-castus).
In 1878, Jean Baptiste Saint-Lager "corrected" the gender agreement of Stylidium armeria to Stylidium armerium.