Gymnadenia conopsea
Lake Engure Nature Park has rich fen vegetation. Typical mire communities are represented by associations of rare specimens such as ' and '. Together with "Schoenus ferrugineus" and "Cladium mariscus", the fen vegetation provides habitat for species that are rare in Latvia — sweet gale ("Myrica gale"), "Dactylorhiza incarnata", "Dactylorhiza cruenta", "Liparis loeselii", "Gymnadenia conopsea" and "Ophrys insectifera" and the rare mosses Irish ruffwort ("Moerckia hibernica") and riccardia ("Riccardia multifida") also are found there. In addition the alliance, "Caricetum lasiocarpae", typical for the coastal lowland of Latvia, is also protected.