The plants are being propagated by seeds, and 30 baby plants were put in confidential locations according to the article. Also:

“Delissea argutidentata was last seen in this area in the early 1970s within three small enclosures fenced by a former tenant. A plant pressing collected from the area in 1971 notes that there were only three plants remaining, the tops of all the plants were damaged – presumably by cattle – and there was no regeneration, likely due to the dense grass. The forward-thinking and installation of protective fencing are key attributes to the species’ persistence in an area highly modified by previous pastoral usage.”

Edit: I could not find anything on this plant having Entheogenic properties nor can I find any other medicinal properties for it. It appears to just be a missing part of the ecosystem.