I would agree with you Calin, I did have photos of leaves of my Cardiocrinum giganteum but I don't have any on this computer. There are other Cardiocrinum species but C. giganteum is most commonly grown. I had one which was supposed to be Cardiocrinum giganteum var. yunnanense, it turned out to be Cardiocrinum cathayanum! I had two small offsets growing which I have not lifted and I know I should have, they survived in the ground in our harsh winter 2010/11. Maybe this year, if they grow, I will have to pot them up and give them care as it is a spectacular flower!
With luck I may still have a C. giganteum, at least it was alive last year but I found they need to be grown in pots in a cold greenhouse over winter here in order to mature and flower. Some I had in the ground disappeared. Two offsets I got from my first one which I bought took 4 and 5 years to flower, from seed you could be waiting an eternity.
This plant looks close to maturity, if it's about to flower it would be a good idea to put it in the ground so it can do it's thing and make offsets before it dies in the autumn. When it flowers you will get a better idea which species it is.
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