Episode 25 of The Trigan Empire
The Giant Plant
aka The Giant Rallus
The Rallu Invasion (The Collection)
De reuzen-ibisplant (Dutch title)
The Giant Ibis Plant (Dutch title, translated)
The Giant Plant was originally published in 7 installments in issues 474 (13 February 1971) to 480 (27 March 1971) of Look and Learn magazine.
It is reprinted in the Don Lawrence Collection Volume 7, The Rallu Invasion.
Installments
Links
474 (13 February 1971)
https://www.catawiki.com/en/l/1404163-40-543-don-lawrence-trigan-empire-original-page-gouache-on-board-de-reuzen-ibisplant-the-giant-rallus-1971
475 (20 February 1971)
https://www.catawiki.com/en/l/44087781-lawrence-don-originele-pagina-in-kleur-trigie-de-reuzen-ibisplant-the-giant-rallus-1971
476 (27 February 1971)
https://www.catawiki.com/en/l/3338481-don-lawrence-trigan-empire-original-page-de-reuzen-ibisplant-the-giant-rallus-1971
477 (6 March 1971)
https://www.pinterest.de/pin/607493437206058479/
478 (13 March 1971)
https://www.catawiki.com/en/l/3338515-don-lawrence-trigan-empire-original-page-de-reuzen-ibisplant-the-giant-rallus-1971
https://www.catawiki.com/en/l/47853259-lawrence-don-originele-pagina-in-kleur-trigie-de-reuzen-ibis-plant-1975
480 (27 March 1971)
https://www.catawiki.com/en/l/3338533-don-lawrence-trigan-empire-original-page-de-reuzen-ibisplant-the-giant-rallus-1971
https://www.catawiki.com/en/l/53897863-lawrence-don-originele-pagina-in-kleur-trigie-de-reuzen-ibis-plant-1975
Plot summary (Dutch)