Yup, captive/cultivated. If it is a new user, you could also copy/paste one of the canned responses to let them know that iNaturalist is primarily for observations of wild species. Florist bouquets are pretty straight forward cases for cultivated - it gets trickier if the flower in the vase is native to the location and possibly picked in the wild and taken home for further study/ID (also see this thread for more discussion on that).
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