The mosquito research used dried daylily flowers in their tests.
The research that looked for colchicine in species that did and did not belong to the Colchicaceae used leaf tissue and used daylilies as one of the species.
The original research that found colchicine in a number of species, in which colchicine was not found in later research, and also German, used different tissues but also "whole" plants.
The later German research used daylily roots/tubers and failed to find colchicine in daylilies.
A basic problem is whether colchicine is present only in members of the Cochicaceae family or whether it has been confirmed as being present in species in other families.
Plant toxins, their presence or absence, is a minefield of potential problems. Plants may or may not produce specific compounds depending on their genetics and depending on their environment. Some plants that become infected with certain disease producing bacteria or fungi, etc., can then produce specific compounds that may help fight those invaders and which they do not produce otherwise. Those compounds may have effects if the plants are eaten. Even more of a problem is that many plant species have bacteria and fungi within them that do not harm the plants but that can produce toxins that harm anything eating the plants. Microorganisms such as those are called endophytes and each one may or may not be present in specific individual plants of the same plant species.
There are quite possibly other compounds present in daylilies that can cause stomach upsets (or other upsets), especially if a sizeable amount is eaten, and which therefore may be classifiable as 'toxins'.
Unfortunately my past attempts to obtain information from researchers have often failed; perhaps this time will be different:-)
